Blackhat Hackers

Hard Drive Inspector Pro 4.1 Free Download

2013-10-14T09:35:00.002+05:30

Hard Drive Inspector professional is a straightforward to use program that monitors laptop disks’ health to stop crashes and high-priced disc recovery. the worth of knowledge keep on a median laptop disk drive typically exceeds the worth of the pc itself. however a tough drive is one amongst the foremost unreliable internal laptop devices. once it crashes (which happens quite frequently), the keep data are going to be lost totally or part. succeeding disk drive recovery is either unimaginable the least bit, or constitutes a really subtle and high-priced procedure which will be performed solely by specialists.

Modern onerous drives support S.M.A.R.T. (Self-Monitoring, Analysis, and news Technology) that was specially developed to notice coming disk failures. victimization this technology disk drive Inspector will monitor the present state of varied life vital parameters describing a disk’s responsibility andperformance. disk drive Inspector analyzes this knowledge and warns the user if the parameters indicate a vital reduction of disk responsibility. Timely alerts create it attainable to repeat the info Associate in Nursingd replace an unreliable disk, therefore preventing data loss and expensive disk drive knowledgerecovery.

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Adobe After Effects CS5 Free Download

2013-10-14T09:27:00.004+05:30

Adobe After Effects CS5 software is the industry leading solution for creating sophisticated motion graphics and cinematic visual effects. Transform moving images for delivery to theaters, living rooms,personal computers, and mobile devices.

Now that After Effects has switched to native 64 bit code, it can take advantage of as much memory as you can throw at it. For example, with 32GB of RAM you could preview more than 30 seconds of 1080p footage. In a system with 136GB of RAM, Adobe claims you can preview as much as 37 seconds of 4K footage, although our test workstation’s 6GB wasn’t enough to try this out. This will provide a significant workflow boost, and help After Effects to win even more friends in the world of film production.
Complementing the expanded RAM capabilities is integrated memory management, where you can allocate how RAM is apportioned between the Adobe apps running on your system, and how much is left for other software. You can also enable background multi-processing, giving each core its own memory segment, although this is only advisable when there’s lots of RAM available, as it reduces the overall total available when previewing.
Another benefit of sharing the same underlying playback engine as Premiere Pro CS5 is that format support mirrors the more mainstream editor, so includes virtually all of the latest types of footage. AVC-Intra, RED, and DSLR content can be imported and used natively. The AVC-Intra support includes 50Mbits/sec and 100Mbits/sec variants, and with RED footage you gain direct access to raw sensor data. This allows you to adjust settings in a similar fashion to photographic RAW files, only more. So you can configure how colour, decoding, white balance and even ISO setting are interpreted, without affecting the original file.

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AutoCAD 2008 Free Download

2013-10-14T09:11:00.001+05:30

AutoCAD 2008 2D and 3D Design Software Explore your design ideas with the powerful new features of AutoCAD 2008 software. Connect with Autodesk 360, share your designs with your social world, and work more productively with model documentation enhancements. And with AutoCAD Apps on Auto desk Exchange, its easier than ever to customize your Auto CAD experience.
Shape the world around you. AutoCAD delivers the speed, power, and flexibility to take documentation and design further. Design and shape the world around you with the powerful, flexible features inAutoCAD 2008 software, one of the worlds leading 2D and 3D CAD design tools. Maximize productivity by using powerful tools for design aggregation and documentation, connecting and streamlining your design and documentation workflows. AutoCAD 2008 is available on Windows and Mac OS, allowing you to work natively on your platform of choice. Extend the power of AutoCAD when you purchase as part of the AutoCAD Design Suite, providing easy-to-use visual communication workflows.

AutoCAD 2008 New Features

Section and Details View
A new model documentation tab provides easier access to tools for creating Section and Details views. Choose from common section methods including Full, half, offset, and aligned. Specify circular or rectangular boundaries for detail views. Constrain section lines and detail boundaries to key points in the drawing views to help maintain fidelity even as the model or layout change. Maintain consistency across multiple section or detail views with customizable view styles.
Strike Thru Text
A new strikethrough style is provided for Mtext, Mleaders, Dimensions, Tables and ArcText offering increased flexibility for representing text in your documents.
Autodesk 360 Connectivity
A tight connection with Autodesk 360 allows you to synchronize files. This includes syncing drawings and folders with your online account directly from within AutoCAD software. www.muhammadniaz.net You can export and attach files directly to your single sign-on account and share files with others via yourAutodesk online account.
Customization and Support File Sync
You can easily share and access your AutoCAD customization preferences and support files to travel with you as you move from one machine to the next.
Social Media Sharing
Share your AutoCAD designs with your social world using built-in connections for Facebook and Twitter.
AutoCAD Apps on Autodesk Exchange
Easily extend the power of AutoCAD software using AutoCAD companion apps created by members of the Autodesk Developer Network. Getting the add ins you need has never been easier. Visit a single destination to select from hundreds of Autodesk approved extensions.
Context Sensitive PressPull
The PressPull tool is enhanced to be more flexible and context sensitive. Now you can use the PressPull tool to extrude and offset curves, creating surfaces and solids. A new Multiple option in the PressPull tool enables you to select multiple objects within a single PressPull operation.
Inventor File Import
Autodesk Inventor Fusion software adds to the 3D conceptual design capabilities of AutoCAD, enabling you to flexibly edit and validate models from almost any source. Enhanced interoperability allows you to edit solids in CAD blocks without exploding them.
Surface Curve Extraction
The new Surface Curve Extraction tool extracts isoline curves through a specified point on a surface or face of a solid.
Modern User Interaction
The AutoCAD user interface has been enhanced to provide a more seamless interaction with the software. You ll find a less intrusive, yet more flexible command line, additional contextual ribbon tabs, and more objects with multi functional grips. This streamlined interaction with powerful tools, such as associative arrays and hatching help you save time and focus on your design.
Property Edit Preview
You can dynamically and instantaneously preview changes to object properties before applying them. For example, if you select objects and then use the Properties palette to change the color, the selected objects dynamically change color as you pass the cursor over each color in the list.
Simplified Migration to AutoCAD 2008
New and enhanced tools make it easier to migrate your custom settings or reset AutoCAD software to the default install settings. Improved handling of tool palettes, a reset tool that returns you to the default settings, and a new migration of custom materials help ease the transition to AutoCAD 2008 from AutoCAD 2007 or previous versions.

1. Install Autocad 2008 (launch setup.exe)
Click on Configure (after accepting license agreement ..)
Click on Custom
Deselect samples
Click on Configuration Complete and then Install

2. Start Autodesk 2008 and Select Activate the Product
when ask for activation, select Enter an Activation Code
Use as serial : 653-10091821 or 655-98989898 or 655-69696969
Write down the request code.

3. Fire up the xforce keygen and generate an activation code
based on your request code. Continue the registration process
Copy and paste your generated activation code ..
Restart AutoCAD

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acdVIDEO Converter 2 Pro Free Download

2013-10-14T00:39:00.003+05:30

acdVIDEO Converter 2 A simple to use HD video converter that can convert video files between the most popular media formats at high speed and quality. Choose between the standard version or do more with your videos with acdVIDEO Converter 2 Pro.

Fast, easy video conversion
acdVIDEO Converter 2 is a simple to use HD video converter that can quickly and easily convert video files between most popular media formats (even M2TS Blu-ray) for high quality playback on your mobile device, including the iPhone4S. Its smart video aspect ratio clipping algorithm helps you make full use of your mobile media player screen. You can also use it to extract your favorite MP3 audio from downloadedvideo files. Use the exclusive Pro Tools Pane to get more from your converted video: adjust the volume of your output file, create still images, clip your favourite segments and more!

Set and forget
Designed to convert videos for your mobile media player, acdVIDEO Converter 2 lets you create a to-do list of videos to convert, and set the program to shut down after conversion is completed, or pause/re-start the conversion at your convenience.
Convert videos and audio among all popular file formats
Convert between all kinds of video and audio formats, including AVI, MP4, MKV, FLV, 3GP, 3G2, WMV, MOV, VOB, MPG, PSP, M4V, VCD, DVD, ARM, ASF, AVS, SWF, MPEG, MTV, OGG, H261, H263, H264, MP3 and more.

Supported Input File Formats
AVI MP4 MKV FLV 3GP 3G2 WMV MOV VOB MPG PSP M4V VCD DVD ARM ASF AVS SWF MPEG MTV OGG H261 H263 H264 RM VID BFI C93 DRC DNXHD DSICIN DV DIF DXA EA FFM FLIC V4L GXF CIN CGI MVE LMLM4 LIBDC1394 NUT MJPEG M1V M2V M2T M2TS MVI MXF V NSV NUV OGV V4L2 RCV VMD PVA R3D YUV CIF GCIF RGB RL2 ROQ RPL CPK VB SON SMK STR THP SEQ TXD VC1 4XM VFM WC3 VQA Y4M

Supported Output File Formats
AVI WMV MP4 3GP FLV MOV ASF M4V MKV DV MPEG1 MPEG2 VOB WMA MP3.

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CorelDRAW 12 Free Download

2013-10-14T00:32:00.002+05:30

CorelDRAW 12 is a vector graphics editor developed and marketed by Corel Corporation of Ottawa, Canada. It is also the name of Corel’s Graphics Suite. Its latest version, named X5 (actually version 15), was released in February 2010.

The CorelDRAW Graphics Suite combines three heavyweight graphics tools–CorelDRAW 11, Photo-Paint 11, and R.A.V.E. 2 which can be used individually or together. Now in version 11, the CorelDRAW Suite shows Corel still has plenty of ideas on how to improve the effectiveness and ease-of-use of these major applications.

New Features of CorelDRAW 12

Enhanced Hints Docker
Multiple Trays
Search Capability
Trusted designer tool
Best content enrichment
Advanced OpenType Support in Corel Draw
New Custom Build Color Harmonies
Creative Color Shaping tools
Endless possibilities of creativity

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TuneUp Utilities 2014 Free Download

2013-10-14T00:25:00.000+05:30

TuneUp Utilities 2014 Improved cleaning, troubleshooting & optimizing. TuneUp Utilities 2014 takes PCoptimization to the next level to keep your Windows® PC, laptop, and tablet in top shape. New features in version 2014 include:

NEW! Flight Mode: Save more battery life and work on the go
NEW! Duplicate Finder: Delete unwanted duplicate files
IMPROVED! Disk Cleaner: Now cleans iTunes® and 150+ programs
IMPROVED! User Interface: Now even easier to optimize your PC

TuneUp Duplicate Finder: Easily find and remove unnecessary duplicate files

Symptoms: Your PC is running out of disk space quickly, even though you’ve removed temporary data with our improved Disk Cleaner!

Cause: Over time, a lot of unnecessary clone files accumulate on your hard disk. These could be backup copies of files you forgot, photos you accidentally saved twice, or personal videos you cloned for editing – but also many programs regularly clone files that you don’t need!

Solution: With Duplicate Finder, you’ll easily find duplicate files across your entire hard disk. Clonedphotos, music titles, videos, documents – no matter what file type, we’ll help you figure out which version of the file you need and which you can safely delete. You’ll often get back gigabytes of unnecessary data in no time.
TuneUp Flight Mode

Problem: You’re on your flight and your battery runs out much sooner than usual.

Cause: Even in regular “Economy Mode”, Wi-Fi & Bluetooth® devices continue to search for connections. This consumes battery and may even affect airplane electronics.

Solution: Just hit the Flight Mode switch to turn off all power-sapping wireless devices and save even more battery life than with Economy Mode. Flight Mode is your ultimate power saver, but it’s not just for frequent flyers: Whenever you need to squeeze the last bit out of your battery to finish that last movie or project on the road, Flight Mode is for you. Here’s what it includes:

Reduced processor power consumption: Flight Mode reduces your processors’ performance and optimizes their power consumption for maximum battery life and sufficient power for basic, everyday use.
Great power savings for your devices: Flight Mode reduces the power consumption of many built-in devices.
Turn off energy-sapping programs: Flight Mode switches off unnecessary background processes thatslow PC performance down.
Turns off wireless devices: Completely disables Wi-Fi & Bluetooth devices instantly just by flipping a switch. This will significantly prolong your battery life. and many more!

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Internet Download Manager 6.18 Free Download

2013-10-14T00:10:00.004+05:30

Internet Download Manager 6.18 Added Windows 8 compatibility. Fixed compatibility problems with different browsers including Internet Explorer 10, all Mozilla Firefox versions up to Mozilla Firefox Aurora, Google Chrome. Improved FLV grabber to save videos from web players on web pages, Google Video, MySpace TV, and other popular sites.

What is new in version 6.18

Added support for Firefox 26 and SeaMonkey 2.21
Resolved problems with downloading videos from several sites
Fixed errors during file assembling, missing file errors, problems with non playing videos, or videos without a sound when taking over downloading of videos in Google Chrome
Fixed other bugs

Internet Download Manager (IDM) is a tool to increase download speeds by up to 5 times, resume and schedule downloads. Comprehensive error recovery and resume capability will restart broken or interrupted downloads due to lost connections, network problems, computer shutdowns, or unexpected power outages. Simple graphic user interface makes IDM user friendly and easy to use.Internet Download Manager has a smart download logic accelerator that features intelligent dynamic file segmentation and safe multipart downloading technology to accelerate your downloads. Unlike otherdownload managers and accelerators Internet Download Manager segments downloaded files dynamically during download process and reuses available connections without additional connect and login stages to achieve best acceleration performance.

Internet Download Manager supports proxy servers, ftp and http protocols, firewalls, redirects, cookies, authorization, MP3 audio and MPEG video content processing. IDM integrates seamlessly into Microsoft Internet Explorer, Netscape, MSN Explorer, AOL, Opera, Mozilla, Mozilla Firefox, Mozilla Firebird, Avant Browser, MyIE2, and all other popular browsers to automatically handle your downloads. You can also drag and drop files, or use Internet Download Manager from command line. Internet Download Managercan dial your modem at the set time, download the files you want, then hang up or even shut down your computer when it’s done.

Other features include multilingual support, zip preview, download categories, scheduler pro, sounds on different events, HTTPS support, queue processor, html help and tutorial, enhanced virus protection ondownload completion, progressive downloading with quotas (useful for connections that use some kind of fair access policy or FAP like Direcway, Direct PC, Hughes, etc.), built-in download accelerator, and many others.

IDM Version 6.18 adds Windows 8 compatibility, adds IDM download panel for web-players that can be used to download flash videos from sites like MySpaceTV, and others. It also features complete Windows 7 and Vista support, video page grabber, redeveloped scheduler, and MMS protocol support. The new version also adds improved integration for IE 10 and IE based browsers, redesigned and enhanceddownload engine, the unique advanced integration into all latest browsers, improved toolbar, and a wealth of other improvements and new features.

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3. Install idman618
4. Close Internet Download Manager in Tray Icon
5. Copy “IDMan” in Crack Folder and Paste into “C:\Program Files\Internet Download Manager”

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Download here - IDM 6.18

Procedure for obtaining JNTUA Original Degree Certificate / Convocation

2013-10-02T12:28:00.002+05:30

JNTUA Original Degree Certificate / Convocation Form

Posted by Nishanth Singamala

Apply for Convocation- Download the link below

Click Here to Download-JNTUA Anantapur Convoaction/OD Form

Enclosures to the application:

1. DD in favor of the

Registrar,

JNTUA, Anantapur payable at Anantapur.

(HT Number shall be written on the back side of

Demand draft).

Fees inclusive of Postage:

a) In Convocation (In Absentia): Rs. 2000/-

b) Pre-Convocation: Rs. 3000/-

c) Post Convocation: Rs. 2000/- + Late fee of Rs. 500/- per each year

2. Photo Copy of the Provisional Certificate

Operators in java

2013-09-30T21:07:00.001+05:30

Operators in java

Operator is a special symbol that is used to perform operations. There are many types of operators in java such as unary operator, arithmetic operator, relational operator, shift operator, bitwise operator, ternary operator and assignment operator.

Precedence of Operators

Operators	Precedence
postfix	`expr++ expr--`
unary	`++expr --expr +expr -expr ~ !`
multiplicative	`* / %`
additive	`+ -`
shift	`<< >> >>>`
relational	`< > <= >= instanceof`
equality	`== !=`
bitwise AND	`&`
bitwise exclusive OR	`^`
bitwise inclusive OR	`\|`
logical AND	`&&`
logical OR	`\|\|`
ternary	`? :`
assignment	`= += -= *= /= %= &= ^= \|= <<= >>= >>>=`

Useful Programs:

There is given some useful programs such as factorial number, prime number, fibonacci series etc.

It is better for the freshers to skip this topic and come to it after OOPs concepts.

1) Program of factorial number.

class Operation{

 static int fact(int number){
  int f=1;
  for(int i=1;i<=number;i++){
  f=f*i;
  }
 return f;
 }

 public static void main(String args[]){
  int result=fact(5);
  System.out.println("Factorial of 5="+result);
 }
}

2) Program of fibonacci series.

class Fabnoci{
 
  public static void main(String...args)
  {
    int n=10,i,f0=1,f1=1,f2=0;
	for(i=1;i<=n;i++)
	{
	  f2=f0+f1;
	  f0=f1;
	  f1=f2;
          f2=f0;
          System.out.println(f2);
	}
	
   }
 }

3) Program of armstrong number.

class ArmStrong{
  public static void main(String...args)
  {
    int n=153,c=0,a,d;
	d=n;
	while(n>0)
	{
	a=n%10;
	n=n/10;
	c=c+(a*a*a);
	}
	if(d==c)
	System.out.println("armstrong number"); 
	else
    System.out.println("it is not an armstrong number"); 
	
   }
}

4) Program of checking palindrome number.

class Palindrome
{
   public static void main( String...args)
  {
   int a=242;
   int  n=a,b=a,rev=0;
   while(n>0)
   {
     a=n%10;
     rev=rev*10+a;
     n=n/10;
   }
   if(rev==b)
   System.out.println("it is Palindrome");
   else
   System.out.println("it is not palinedrome");
  
  }
}

5) Program of swapping two numbers without using third variable.

class SwapTwoNumbers{
public static void main(String args[]){
int a=40,b=5;
a=a*b;
b=a/b;
a=a/b;

System.out.println("a= "+a);
System.out.println("b= "+b);

}
}

6) Program of factorial number by recursion

class FactRecursion{

static int fact(int n){
if(n==1)
return 1;

return n*=fact(n-1);
}

public static void main(String args[]){

int f=fact(5);
System.out.println(f);
}
}

Unicode System

2013-09-30T21:04:00.005+05:30

Unicode System

Unicode is a universal international standard character encoding that is capable of representing most of the world's written languages.

Why java uses Unicode System?

Before Unicode, there were many language standards:

ASCII (American Standard Code for Information Interchange) for the United States.
ISO 8859-1 for Western European Language.
KOI-8 for Russian.
GB18030 and BIG-5 for chinese, and so on.

This caused two problems:

A particular code value corresponds to different letters in the various language standards.
The encodings for languages with large character sets have variable length.Some common characters are encoded as single bytes, other require two or more byte.

To solve these problems, a new language standard was developed i.e. Unicode System.

In unicode, character holds 2 byte, so java also uses 2 byte for characters.

lowest value:\u0000

highest value:\uFFFF

Variable and Datatype in Java

2013-09-30T21:03:00.003+05:30

Variable and Datatype in Java

Variable
Types of Variable
Data Types in Java

In this page, we will learn about the variable and java data types. Variable is a name of memory location. There are three types of variables: local, instance and static. There are two types of datatypes in java, primitive and non-primitive.

Variable

Variable is name of reserved area allocated in memory.

int data=50;//Here data is variable

Types of Variable

There are three types of variables in java

local variable
instance variable
static variable

Local Variable

A variable that is declared inside the method is called local variable.

Instance Variable

A variable that is declared inside the class but outside the method is called instance variable . It is not declared as static.

Static variable

A variable that is declared as static is called static variable. It cannot be local.

We will have detailed learning of these variables in next chapters.

Example to understand the types of variables

class A{

int data=50;//instance variable

static int m=100;//static variable

void method(){
int n=90;//local variable
}

}//end of class

Data Types in Java

In java, there are two types of data types

primitive data types
non-primitive data types

Data Type	Default Value	Default size
Boolean	false	1 bit
char	'\u0000'	2 byte
byte	0	1 byte
short	0	2 byte
int	0	4 byte
long	0L	8 byte
float	0.0f	4 byte
double	0.0d	8 byte

Why char uses 2 byte in java and what is \u0000 ?

because java uses unicode system rather than ASCII code system. \u0000 is the lowest range of unicode system.To get detail about Unicode see below.

JVM (Java Virtual Machine)

2013-09-30T21:00:00.002+05:30

JVM (Java Virtual Machine)

Java Virtual Machine
Internal Architecture of JVM
Classloader
Class Area
Heap Area
Stack Area
Program Counter Register
Native Method Stack
Execution Engine

JVM (Java Virtual Machine) is an abstract machine.It is a specification that provides runtime environment in which java bytecode can be executed.

JVMs are available for many hardware and software platforms (i.e.JVM is plateform dependent).

The JVM performs four main tasks:

Loads code
Verifies code
Executes code
Provides runtime environment

JVM provides definitions for the:

Memory area
Class file format
Register set
Garbage-collected heap
Fatal error reporting etc.

Internal Architecture of JVM

Let's understand the internal architecture of JVM. It contains classloader, memory area, execution engine etc.

1) Classloader:

Classloader is a subsystem of JVM that is used to load class files.

2) Class(Method) Area:

Class(Method) Area stores per-class structures such as the runtime constant pool, field and method data, the code for methods.

3) Heap:

It is the runtime data area in which objects are allocated.

4) Stack:

Java Stack stores frames.It holds local variables and partial results, and plays a part in method invocation and return.

Each thread has a private JVM stack, created at the same time as thread.

A new frame is created each time a method is invoked. A frame is destroyed when its method invocation completes.

5) Program Counter Regiser:

PC (program counter) register. It contains the address of the Java virtual machine instruction currently being executed.

6) Native Method Stack:

It contains all the native methods used in the application.

7) Execution Engine:

It contains:

1) A virtual processor

2) Interpreter:Read bytecode stream then execute the instructions.

3) Just-In-Time(JIT) compiler:It is used to improve the performance.JIT compiles parts of the byte code that have similar functionality at the same time, and hence reduces the amount of time needed for compilation.Here the term ?compiler? refers to a translator from the instruction set of a Java virtual machine (JVM) to the instruction set of a specific CPU.

Difference between JDK,JRE and JVM

2013-09-30T20:57:00.005+05:30

Difference between JDK,JRE and JVM

Brief summary of JVM
Java Runtime Environment (JRE)
Java Development Kit (JDK)

Understanding the difference between JDK, JRE and JVM is important in Java. We will have brief overview of JVM here. If you want to gain the detailed knowledge of JVM, move to the next page. Firstly, let's see the basic differences between the JDK, JRE and JVM.

JVM

JVM (Java Virtual Machine) is an abstract machine.It is a specification that provides runtime environment in which java bytecode can be executed.

JVMs are available for many hardware and software platforms (i.e.JVM is plateform dependent).

The JVM performs four main tasks:

Loads code
Verifies code
Executes code
Provides runtime environment

JRE

JRE is an acronym for Java Runtime Environment.It is used to provide runtime environment.It is the implementation of JVM.It physically exists.It contains set of libraries + other files that JVM uses at runtime.

Implementation of JVMs are also actively released by other companies besides Sun Micro Systems.

JDK

JDK is an acronym for Java Development Kit.It physically exists.It contains JRE + development tools.

How to set path of JDK in Windows

2013-09-30T20:55:00.002+05:30

How to set path of JDK in Windows:

Posted by Nishanth Singamala

How to set path of JDK in Windows OS
1. Setting Temporary Path of JDK
2. Setting Permanent Path of JDK
How to set path of JDK in Linux OS

Path is required for using tools such as javac, java etc. If you are saving the java file in jdk/bin folder, path is not required.But If you are having your java file outside the jdk/bin folder, it is necessary to set path of JDK. There are two ways to set path of JDK:

temporary
permanent

1)Setting temporary Path of JDK in Windows:

For setting the temporary path of JDK, you need to follow these steps:

Open command prompt
copy the path of bin folder
write in command prompt: set path=copied path

For Example:

set path=C:\Program Files\Java\jdk1.6.0_23\bin

Let's see it in the figure given below:

2)Setting Permanent Path of JDK in Windows:

For setting the permanent path of JDK, you need to follow these steps:

Go to MyComputer properties -> advanced tab -> environment variables -> new tab of user variable -> write path in variable name -> write path of bin folder in variable value -> ok -> ok -> ok

For Example:

1)Go to MyComputer properties

2)click on advanced tab

3)click on environment variables

4)click on new tab of user variables

5)write path in variable name

6)Copy the path of bin folder

7)paste path of bin folder in variable value

8)click on OK button

9)click on OK button

Now your permanent path is set.You can now execute any program of java from any drive.

Setting Path in Linux OS

Setting the path in Linux OS is same as setting the path in the Windows OS. But here we use export tool rather than set. Let's see how to set path in Linux OS:

export PATH=$PATH:/home/jdk1.6.01/bin/

Here, we have installed the JDK in the home directory under Root (/home).

Internal Details of Hello Java Program

2013-09-30T20:09:00.000+05:30

Internal Details of Hello Java Program

Posted by Nishanth Singamala

Internal Details of Hello Java

In the previous page, we have learned about the first program, how to compile and how to run the first java program. Here, we are going to learn, what happens while compiling and running the java program. Moreover, we will see some quesitons based on the first program.

What happens at compile time?

At compile time, java file is compiled by Java Compiler (It does not interact with OS) and converts the java code into byte-code.

What happens at runtime?

At runtime, following steps are performed:

Classloader: is the subsystem of JVM that is used to load class files.

Bytecode Verifier: checks the code fragments for illegal code that can violate accesss right to objects.

Interpreter: read bytecode stream then execute the instructions.

Q)Can you save a java source file by other name than the class name?

Yes, like the figure given below illustrates:

To compile:	javac Hard.java
To execute:	java Simple

Q)Can you have multiple classes in a java source file?

Yes, like the figure given below illustrates:

Hello Java Example

2013-09-29T15:34:00.000+05:30

Hello Java Example

Requirements for creating Hello Java Example
Creating Hello Java Example
Resolving javac not recognized exception

In this page, we will learn how to write the hello java program. Creating hello java example is too easy. Here, we have created a class named Simple that contains only main method and prints a message hello java. It is the simple program of java.

Requirement for Hello Java Example

For executing any java program, you need to

create the java program.
install the JDK if you don't have installed it, download the JDK and install it.
set path of the bin directory under jdk.
compile and execute the program.

Creating hello java example

Let's create the hello java program:


class Simple{
public static void main(String args[]){
     System.out.println("Hello Java")
    }
}

save this file as Simple.java

To compile:	javac Simple.java
To execute:	java Simple

Output:Hello Java

Understanding first java program

Let's see what is the meaning of class, public, static, void, main, String[], System.out.println().

class is used to declare a class in java.
public is an access modifier which represents visibility, it means it is visible to all.
static is a keyword, if we declare any method as static, it is known as static method. The core advantage of static method is that there is no need to create object to invoke the static method. The main method is executed by the JVM, so it doesn't require to create object to invoke the main method. So it saves memory.
void is the return type of the method, it means it doesn't return any value.
main represents startup of the program.
String[] args is used for command line argument. We will learn it later.
System.out.println() is used print statement.

To write the simple program, open notepad and write simple program as displayed below:

As displayed in the above diagram, write the simple program of java in notepad and saved it as Simple.java. To compile and run this program, you need to open command prompt by start -> All Programs -> Accessories -> command prompt.

To compile and run the above program, go to your current directory first; my current directory is c:\new . Write here:

To compile:	javac Simple.java
To execute:	java Simple

Resolving an exception "javac is not recognized as an internal or external command" ?

If there occurs a problem like displayed in the below figure, you need to set path. Since DOS doesn't know javac or java, we need to set path. Path is not required in such a case if you save your program inside the jdk/bin folder. But its good approach to set path. Click here for How to set path in java.

Features of Java

2013-09-29T15:26:00.002+05:30

Features of Java

Posted By Nishanth Singamala

There is given many features of java. They are also called java buzzwords.

Features of Java
1. Simple
2. Object-Oriented
3. Platform Independent
4. secured
5. Robust
6. Architecture Neutral
7. Portable
8. High Performance
9. Distributed
10. Multi-threaded

Simple

Java is simple in the sense that:

syntax is based on C++ (so easier for programmers to learn it after C++).

removed many confusing and/or rarely-used features e.g., explicit pointers, operator overloading etc.

No need to remove un-referenced objects because there is Automatic Garbage Collection in java.

Object-oriented

Object-oriented means we organize our software as a combination of different types of objects that incorporates both data and behavior.

Object-oriented programming(Oops) is a methodology that simplify software development and maintenance by providing some rules.

Basic concepts of Oops are:

Object
Class
Inheritance
Polymorphism
Abstraction
Encapsulation

Platform Independent

A platform is the hardware or software environment in which a program runs. There are two types of platforms software-based and hardware-based. Java provides software-based platform. The Java platform differs from most other platforms in the sense that it's a software-based platform that runs on top of other hardware-based platforms.It has two components:

Run time Environment
API(Application Programming Interface)

Java code can be run on multiple platforms e.g.Windows,Linux,Sun Solaris,Mac/OS etc. Java code is compiled by the compiler and converted into byte code. This byte code is a platform independent code because it can be run on multiple platforms i.e. Write Once and Run Anywhere(WORA).

Secured

Java is secured because:

No explicit pointer
Programs run inside virtual machine sandbox.

Classloader- adds security by separating the package for the classes of the local file system from those that are imported from network sources.
Bytecode Verifier- checks the code fragments for illegal code that can violate accesss right to objects.
Security Manager- determines what resources a class can access such as reading and writing to the local disk.

These security are provided by java language. Some sucurity can also be provided by application developer through SSL,JAAS,cryptography etc.

Robust

Robust simply means strong. Java uses strong memory management. There are lack of pointers that avoids security problem. There is automatic garbage collection in java. There is exception handling and type checking mechanism in java. All these points makes java robust.

Architecture-neutral

There is no implementation dependent features e.g. size of primitive types is set.

Portable

We may carry the java byte-code to any platform.

High-performance

Java is faster than traditional interpretation since byte code is "close" to native code still somewhat slower than a compiled language (e.g., C++)

Distributed

We can create distributed applications in java. RMI and EJB are used for creating distributed applications. We may access files by calling the methods from any machine on the internet.

Multi-threaded

A thread is like a separate program, executing concurrently. We can write Java programs that deal with many tasks at once by defining multiple threads. The main advantage of multi-threading is that it shares the same memory. Threads are important for multi-media, Web applications etc.

History of Java

2013-09-29T15:12:00.001+05:30

History of Java

Posted By Nishanth Singamala

Brief history of Java

Java Version History

Java history is interesting to know. Java team members (also known as Green Team), initiated a revolutionary task to develop a language for digital devices such as set-top boxes, televisions etc.
At that time, it was a advanced concept for the green team. But, it was good for internet programming. Later, Netscape Navigator incorporated Java technology.

James Gosling

Currently, Java is used in internet programming, mobile devices, games, e-business solutions etc. Let's see the major points that describes the history of java.

1) James Gosling, Mike Sheridan, and Patrick Naughton initiated the Java language project in June 1991. The small team of sun engineers called Green Team.

2) Originally designed for small, embedded systems in electronic appliances like set-top boxes.

3) Firstly, it was called "Greentalk" by James Gosling and file extension was .gt.

4) After that, it was called Oak and was developed as a part of the Green project.

5) Why Oak? Oak is a symbol of strength and choosen as a national tree of many countries like U.S.A., France, Germany, Romania etc.

6) In 1995, Oak was renamed as "Java" because it was already a trademark by Oak Technologies.

7) Why they choosed java name for java language? The team gathered to choose a new name. The suggested words were "dynamic", "revolutionary", "Silk", "jolt", "DNA" etc. They wanted something that reflected the essence of the technology: revolutionary, dynamic, lively, cool, unique, and easy to spell and fun to say.
According to James Gosling "Java was one of the top choices along with Silk". Since java was so unique, most of the team members preferred java.

8) Java is an island of Indonesia where first coffee was produced (called java coffee).

9) Notice that Java is just a name not an acronym.

10) Originally developed by James Gosling at Sun Microsystems (which is now a subsidiary of Oracle Corporation) and released in 1995.

11) In 1995, Time magazine called Java one of the Ten Best Products of 1995.

12) JDK 1.0 released in(January 23, 1996).

Java Version History

There are many java versions that has been released.

JDK Alpha and Beta (1995)
JDK 1.0 (23rd Jan, 1996)
JDK 1.1 (19th Feb, 1997)
J2SE 1.2 (8th Dec, 1998)
J2SE 1.3 (8th May, 2000)
J2SE 1.4 (6th Feb, 2002)
J2SE 5.0 (30th Sep, 2004)
Java SE 6 (11th Dec, 2006)
Java SE 7 (28th July, 2011)

What is Java?

2013-09-29T14:54:00.004+05:30

Java - What, Where and Why?

Posted By Nishanth Singamala

Java - What, Where and Why?
What is Java
Where Java is used
Java Applications

Java technology is wide used currently. Let's start learning of java from basic questions like what is java, where it is used, what type of applications are created in java and why use java?

What is Java?

Java is a programming language and a platform.
Platform Any hardware or software environment in which a program runs, known as a platform. Since Java has its own Runtime Environment (JRE) and API, it is called platform.

Where it is used?

According to Sun, 3 billion devices run java. There are many devices where java is currently used. Some of them are as follows:

Desktop Applications such as acrobat reader, media player, antivirus etc.
Web Applications such as irctc.co.in, javatpoint.com etc.
Enterprise Applications such as banking applications.
Mobile
Embedded System
Smart Card
Robotics
Games etc.

Types of Java Applications

There are mainly 4 type of applications that can be created using java:

1) Standalone Application

It is also known as desktop application or window-based application. An application that we need to install on every machine such as media player, antivirus etc. AWT and Swing are used in java for creating standalone applications.

2) Web Application

An application that runs on the server side and creates dynamic page, is called web application. Currently, servlet, jsp, struts, jsf etc. technologies are used for creating web applications in java.

3) Enterprise Application

An application that is distributed in nature, such as banking applications etc. It has the advantage of high level security, load balancing and clustering. In java, EJB is used for creating enterprise applications.

4) Mobile Application

An application that is created for mobile devices. Currently Android and Java ME are used for creating mobile applications.

Do You Know ?

What is the difference between JRE and JVM ?
What is the purpose of JIT compiler ?
Can we save the java source file without any name ?
Why java uses the concept of unicode system ?

What we will learn in Basics of Java ?

History of java
Features of java
Simple Program of Java
Internal of Hello Java Program
How to set path in Windows OS
Difference between JDK, JRE and JVM
Internal Details of JVM
Variable and Data Type
Unicode System
Operators

How to Change the ICON of an EXECUTABLE file

2013-09-29T03:11:00.001+05:30

How to Change the ICON of an EXECUTABLE file

Posted by Nishanth Singamala

Some times it becomes necessary to change the icon of an executable file so that the file gets a new appearance. Many of the tools such as TuneUP Winstyler does this job by adjusting the Windows to display a custom icon to the user. But, in reality if the file is carried to a different computer, then it shows its original icon itself.

This means that in order to permanently change the icon, it is necessary to modify the executable file and embed the icon inside the file itself. When this is done the executable file’s icon is changed permanently, so that even if you take file to a different computer it show’s a new icon.

For this purpose I have found a nice tool which will modidify the executable file and embed the icon of your choice into the file itself. ie: The tool changes the icon of the executable file permanently.

How to Change the Executable File Icon?

Here is a step-by-step instruction on how to use this tool to change the icon of any EXE file:

Go to www.shelllabs.com and download the trial version of IconChanger and install it (Works on XP, Vista and Win 7).
Run the IconChanger program from Start -> All Programs and you should see an interface as shown below:
Now you will see a window stating that “Choose an object whose icon you want to change”. Click on the “OK” button.
Now select the executable file for which you wish to change the icon.
Icon changer will automatically search for all the icons on your “C:\ drive” so that you can select any one of those. If your desired icon is not shown in the window, you may paste the path of your icon file in the field which says “Search icons in” so that your desired icon gets displayed.
Select the ICON of your choice and click on Set button.
Now a popup window will appear and ask you to select from either of these two options.
- Change embeded icon.
- Adjust Windows to display custom icon.
Select the first option (Change embedded icon). You are done. The icon gets changed.

I hope you like this post. Pass your comments in case if you have any queries or clarifications.

How to Hack Windows Vista Base Score

2013-09-29T03:10:00.001+05:30

How to Hack Windows Vista Base Score

Posted by Nishanth Singamala

If you are a Windows Vista user then you are very likely to be familiar with the concept of Base Score. This score is calculated based on the computer’s hardware and software configuration. This score act’s as a rating to your PC. If you have a too low base score then don’t worry. Hacking Windows Vista’s so called Base Scoreis very easy. It is possible to hack this score in just a few minutes. Here are the snapshots of my own system. Actually my system’s base score is 3.7. But I have brought it up to 9.5 with this small hack. This can be done for your computer too!

Here is a step-by-step instruction to hack the base score of Windows Vista:

Type the following command in the “Run” dialog box:

%systemroot%\Performance\WinSAT\DataStore
You should see a .xml file with Assessment (Formal).WinSAT as filename.
Right-click it and select open with ‘Wordpad’ (Not notepad!)
On line 12, you should see something like the following:

<SystemScore>9.5</SystemScore>
<MemoryScore>9.5</MemoryScore>
<CpuScore>9.5</CpuScore>
<CPUSubAggScore>9.5</CPUSubAggScore>
<VideoEncodeScore>5.5</VideoEncodeScore>
<GraphicsScore>9.5</GraphicsScore>
<GamingScore>9.5</GamingScore>
<DiskScore>9.5</DiskScore>
You can enter any number in the place where I have written 9.5. But the number should be less than 10.
Once you have entered the number of your choice save the file and close it.
That’s it. You have successfully altered your Windows Vista base score. No restart is required.

Please note that this trick will neither improve the performance of your system nor will make your PC compatible to run Windows Aero UI. This is just a hack to display a bigger base score.

How to Completely Erase a Hard Disk Drive

2013-09-29T03:07:00.002+05:30

How to Completely Erase a Hard Disk Drive

Posted by Nishanth Singamala

A new year has begun and perhaps you have decided to perform a system upgrade or get rid of your old computer system and purchase a new one. But, before you sell or donate your old computer, it is very much necessary tocompletely erase your hard disk drive.

Yes, every one of us are aware of this fact and so, we delete the contents of the hard disk either by using the DELETE key on our keyboard or by Formatting the hard disk.

Deleting and Formatting – Just Not Secure Enough!

But the fact is, the data will still be on the hard disk even after deleting it or formatting the hard disk. Using the delete key on your keyboard will only remove the shortcuts to the files making them invisible to users. Deleted files still reside on the hard drive and a quick Google search will show many options for system recovery software will allow anyone to reinstate that data.

Formatting the hard drive is a bit more secure way to erase the hard disk. Formatting a disk will not erase the actual data on the disk but only the address tables pointing to the data are dropped. It makes it much more difficult to recover the files. However, a computer specialist would be able to recover most or all the data that was on the disk before the reformat. For those who accidentally reformat a hard disk, being able to recover most or all the data that was on the disk is a good thing. However, if you’re preparing a system for retirement to charity or any other organization, this obviously makes you more vulnerable to data theft.

Completely Erase the Hard Disk through Disk Wiping:

So it is necessary for us to use a 100 percent secure way to erase the data from the hard disk drive. This way of securely erasing the data is called Disk Wiping. Disk wiping is a secure method of ensuring that data, including company and individually licensed software on your computer and storage devices is irrecoverably deleted before recycling or donating the equipment. Because previously stored data can be brought back with the right software and applications, the disk wiping process will actually overwrite your entire hard drive with data, several times. Once you format you’ll find it all but impossible to retrieve the data which was on the drive before the overwrite. The more times the disk is overwritten and formatted the more secure the disk wipe is.

There are a variety of disk wiping products available that you can purchase, or freely downloaded online to perform more secure disk wipes. One of my favorite disk wiping software is:

WipeDrive/ WipeDrive Professional

You have to use this tool by burning the iso image file onto a CD or by using a floppy disk. After burning this tool you have to boot your PC and follow the screen instructions to completely wipe out the data from your hard disk drive.

Display Legal Notice on Windows Startup

2013-09-29T03:06:00.002+05:30

Display Legal Notice on Windows Startup

Posted by Nishanth Singamala

If your PC has multiple users or you have your PC on a public place, then you can nowdisplay legal notice to every user before they log in to your PC. This legal notice will be displayed on the Logon screen at every startup just before the Desktop is loaded.

Using this way, you can tell your friends or give a warning to the users about the DO’s and DON’ts in your computer when they use it in your absence. You can do this pretty easily just by using a small registry hack.

Steps to Display Legal Notice on Startup:

Go to Start -> Run, type regedit and hit ENTER.
Navigate to the following key in the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system

On the right side pane look for “legalnoticecaption“, double click on it and enter the desired Legal Notice Caption.

Next below this look for “legalnoticetext” and enter the desired Legal Notice Text. The legal notice text can be up to a page in its size so that it can include a set of do’s and dont’s for your computer.
After you do this just restart your computer and upon the next startup you can see the legal notice information for your computer. This trick works on Windows XP, Vista and Windows 7 as well.

I hope you enjoy this post! Pass your comments.

How to Make An Invisible Password Protected Folder

2013-09-29T03:05:00.002+05:30

How to Make An Invisible Password Protected Folder

Posted by Nishanth Singamala

Do you want to password protect your folder? Do you want to make it invisible so that it remains unnoticed by other users of your PC? Well, here is a way to do that.

In this post, I will show you how to make an invisible password protected folder in Windows without using any additional software.

How to Create a Password Protected Folder?

Here is is step-by-step procedure to do this:

Step-1: Create a new folder (Right-click -> New -> Folder) and give it any name of your choice. For instance I name it as ABC.

Step-2: Now, in this folder place all the important files, documents or any folders that you want to password protect.

Step-3: Right-click on this folder (ABC) and select the option Send To -> Compressed (zipped) Folder.

Step-4: Now a new compressed zipped folder gets created next this folder (ABC) with the same name.

Step-5: Double-click on this compressed zipped folder and you should see your original folder (ABC) here.

Step-6: Now go to the File menu and select the option Add a password (File -> Add a password)

Now a small window will pop up and here you can set your desired password. Once the password is set, the folder will ask for the password every time it is opened. Thus ,you have now created the password protected folder.

How to Make the Folder Invisible?

Step-1: Right-click on this password protected folder and select Properties.

Step-2: At the bottom select the option Hidden and press OK. Now your folder gets invisible (hidden).

Step-3: In order to unhide this folder, go to My Computer -> Tools -> Folder options. Switch to View tab, scroll down and under Hidden files and folders you’ll see the following two options:

Do not show hidden files and folders.
Show hidden files and folders.

Select the second option and press OK. Now the invisible folder becomes visible in its location. To access it you need the password. To make it invisible again, repeat step -1 through step-3 and select the first option and click OK. Now, the folder becomes invisible once again.

I hope that you’ve now understood how to create an invisible password protected folder in Windows. If you like this post, pass your comments! Cheers

How to Repair Windows Registry the Easy Way

2013-09-29T03:04:00.002+05:30

How to Repair Windows Registry the Easy Way

Posted by Nishanth Singamala

This article explains how to inspect and repair the registry errors in your Windows PC so as to improve its overall performance. If you are a Windows user, you are most likely to be aware of the fact that the Windows registry gets corrupted over time resulting in an overall decreased performance of the computer.

At times, registry errors can also make your PC to freeze down and hang up every now and then causing a serious annoyance to the users. At this point, the registry needs a serious repair to bring the PC back to its life. Well, before I tell you how to repair the registry, lets see what causes the registry to get corrupted.

Registry errors may occur due to installing too many applications/software programs from time to time without verifying the publishers. This may create invalid entries in the registry hive leading to the errors. With the Internet boom and the era of freeware with free downloads, people often install programs from untrusted sources which results in a serious damage to the registry. Since the registry is a crucial component of the Windows operating system, damage to this can cause the system performance to drop down significantly.

Repairing the Corrupt Windows Registry: The Easy Way

The best and the easiest way to do this is by using a Registry Repair Tool (Registry Cleaner). This program will automatically scan the registry of your PC to find invalid entries and will fix them by removing the errors with in no time. A registry cleaner is the simple and safest solution to fix registry errors without the need to re-install the Windows.

Which Registry Cleaner is the Best?

Well, today there exists hundreds of Registry repair tools on the market and as a result, people often get confused at which one to go far. Hence, when it comes to the choice of Registry repair tool, we must be very selective since not all of them are the same.

On the Internet, there exists many such tools which are simply useless and doesn’t apply any significant fixes to the Windows registry. After trying many such useless products on my PC, I finally found one good product which actually made a magic to my PC performance. It is:

RegCure Pro – Boost Your PC Speed

RegCure Pro is one of the best and award winning registry cleaner tool that repairs registry to avoid PC errors such as unwanted shutdown, freezing, crashing and more. This tool will:

Repair the registry and increases your PC performance by upto 70%
Fix DLL errors and invalid shortcuts
Free up virtual memory to avoid error messages
Performs Defragmentation and Compression of the registry
Fix blue screen errors, system crashes, startup errors and more…

RegCure Pro is not just a Registry cleaner, rather it is a complete Optimization Toolkit for your PC. For more information on this program, you can visit the RegCure Pro Homepage.

Can I Manually Repair the Registry?

Windows registry has a very complex structure with hundreds of thousands of entries embedded in it. A corrupt registry may contain thousands of invalid entries and errors in it as a result of which, it is impractical and almost impossible to manually inspect, find and repair those errors. Also, manual registry repair involves serious risk and can lead to a total system breakdown if done improperly. Except you are a highly experienced Windows user or a Windows expert, you are not encouraged to tamper with the registry.

Hence, using a Repair tool is the safest and the easiest way to repair the registry errors and improve the overall performance of your PC. It is recommended that you periodically (daily or weekly) perform registry scans using these tools to repair the errors as and when they come up so that, you can keep your PC’s health at its best. Just repairing the Windows registry can make your PC blazing fast like never before!

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Procedure for obtaining JNTUA Original Degree Certificate / Convocation

JNTUA Original Degree Certificate / Convocation Form

Operators in java

Operators in java

Useful Programs:

It is better for the freshers to skip this topic and come to it after OOPs concepts.

1) Program of factorial number.

2) Program of fibonacci series.

3) Program of armstrong number.

4) Program of checking palindrome number.

5) Program of swapping two numbers without using third variable.

6) Program of factorial number by recursion

Unicode System

Unicode System

Why java uses Unicode System?

Variable and Datatype in Java

Variable and Datatype in Java

Variable

Types of Variable

Local Variable

Instance Variable

Static variable

Example to understand the types of variables

Data Types in Java

Why char uses 2 byte in java and what is \u0000 ?

JVM (Java Virtual Machine)

JVM (Java Virtual Machine)

Internal Architecture of JVM

1) Classloader:

2) Class(Method) Area:

3) Heap:

4) Stack:

5) Program Counter Regiser:

6) Native Method Stack:

7) Execution Engine:

Difference between JDK,JRE and JVM

Difference between JDK,JRE and JVM

JVM

JRE

JDK

How to set path of JDK in Windows

How to set path of JDK in Windows:

1)Setting temporary Path of JDK in Windows:

For Example:

2)Setting Permanent Path of JDK in Windows:

For Example:

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