tag:blogger.com,1999:blog-88332138196965151802025-11-12T05:54:38.409-08:00Lambert LeonardLambert Leonardhttp://www.blogger.com/profile/15724107357609635064noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-8833213819696515180.post-68621289952480368622010-03-03T05:05:00.000-08:002010-03-03T05:08:17.352-08:00Is java case sensitive? If not anybody can Prove it...Lambert Leonardhttp://www.blogger.com/profile/15724107357609635064noreply@blogger.com1tag:blogger.com,1999:blog-8833213819696515180.post-61279745387648634512010-03-02T01:09:00.000-08:002010-03-02T01:17:18.600-08:00Java Class Loader<div style="text-align: justify;"><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; line-height: 19px;"> The <b>Java Classloader</b> is a part of the <a class="mw-redirect" href="http://en.wikipedia.org/wiki/Java_Runtime_Environment" style="-webkit-background-clip: initial; -webkit-background-origin: initial; background-attachment: initial; background-color: initial; background-image: none; background-repeat: initial; text-decoration: none;" title="Java Runtime Environment"><span class="Apple-style-span" style="color: black;">Java Runtime Environment</span></a> that dynamically <a href="http://en.wikipedia.org/wiki/Loader_(computing)" style="-webkit-background-clip: initial; -webkit-background-origin: initial; background-attachment: initial; background-color: initial; background-image: none; background-repeat: initial; text-decoration: none;" title="Loader (computing)"><span class="Apple-style-span" style="color: black;">loads</span></a> <a class="mw-redirect" href="http://en.wikipedia.org/wiki/Java_class" style="-webkit-background-clip: initial; -webkit-background-origin: initial; background-attachment: initial; background-color: initial; background-image: none; background-repeat: initial; text-decoration: none;" title="Java class"><span class="Apple-style-span" style="color: black;">Java classes</span></a> into the <a href="http://en.wikipedia.org/wiki/Java_Virtual_Machine" style="-webkit-background-clip: initial; -webkit-background-origin: initial; background-attachment: initial; background-color: initial; background-image: none; background-repeat: initial; text-decoration: none;" title="Java Virtual Machine"><span class="Apple-style-span" style="color: black;">Java</span></a><a href="http://en.wikipedia.org/wiki/Java_Virtual_Machine" style="-webkit-background-clip: initial; -webkit-background-origin: initial; background-attachment: initial; background-color: initial; background-image: none; background-position: initial initial; background-repeat: initial; color: #002bb8; text-decoration: none;" title="Java Virtual Machine"> </a><a href="http://en.wikipedia.org/wiki/Java_Virtual_Machine" style="-webkit-background-clip: initial; -webkit-background-origin: initial; background-attachment: initial; background-color: initial; background-image: none; background-repeat: initial; text-decoration: none;" title="Java Virtual Machine"><span class="Apple-style-span" style="color: black;">Virtual Machine</span></a>. Usually classes are only loaded <a class="mw-redirect" href="http://en.wikipedia.org/wiki/On_demand" style="-webkit-background-clip: initial; -webkit-background-origin: initial; background-attachment: initial; background-color: initial; background-image: none; background-repeat: initial; text-decoration: none;" title="On demand"><span class="Apple-style-span" style="color: black;">on demand</span></a>. The Java run time system does not need to know about files and file systems because of class loaders. <a href="http://en.wikipedia.org/wiki/Delegation_(programming)" style="-webkit-background-clip: initial; -webkit-background-origin: initial; background-attachment: initial; background-color: initial; background-image: none; background-repeat: initial; text-decoration: none;" title="Delegation (programming)"><span class="Apple-style-span" style="color: black;">Delegation</span></a> is an important concept to understand when learning about class loaders.</span><br />
<span class="Apple-style-span" style="font-family: sans-serif; font-size: small;"><span class="Apple-style-span" style="font-size: 13px; line-height: 19px;"><br />
</span></span><br />
<span class="Apple-style-span" style="font-family: sans-serif; font-size: small;"><span class="Apple-style-span" style="font-size: 13px; line-height: 19px;"> When the JVM is started, three class loaders are used:</span></span><br />
<span class="Apple-style-span" style="font-family: sans-serif; font-size: small;"><span class="Apple-style-span" style="font-size: 13px; line-height: 19px;"> 1) Bootstrap class loader</span></span><br />
<span class="Apple-style-span" style="font-family: sans-serif; font-size: small;"><span class="Apple-style-span" style="font-size: 13px; line-height: 19px;"> 2) Extensions class loader</span></span><br />
<span class="Apple-style-span" style="font-family: sans-serif; font-size: small;"><span class="Apple-style-span" style="font-size: 13px; line-height: 19px;"> 3) System class loader</span></span><br />
<span class="Apple-style-span" style="font-family: sans-serif; font-size: small;"><span class="Apple-style-span" style="font-size: 13px; line-height: 19px;"></span></span><br />
<span class="Apple-style-span" style="font-family: sans-serif; font-size: small;"><div style="line-height: 1.5em; margin-bottom: 0.5em; margin-left: 0px; margin-right: 0px; margin-top: 0.4em;"><span class="Apple-style-span" style="font-size: small;">The bootstrap class loader loads the core Java libraries (</span><code style="font-family: monospace, sans-serif;"><java_home><span class="Apple-style-span" style="background-color: #6aa84f;"><span class="Apple-style-span" style="font-size: small;">/lib</span></span></java_home></code><span class="Apple-style-span" style="font-size: small;"> directory). This class loader, which is part of the core JVM, is written in native code.</span></div><div style="line-height: 1.5em; margin-bottom: 0.5em; margin-left: 0px; margin-right: 0px; margin-top: 0.4em;"><span class="Apple-style-span" style="font-size: small;">The extensions class loader loads the code in the extensions directories (</span><code style="font-family: monospace, sans-serif;"><java_home><span class="Apple-style-span" style="background-color: #6aa84f;"><span class="Apple-style-span" style="font-size: small;">/lib/ext</span></span></java_home></code><span class="Apple-style-span" style="font-size: small;"> or any other directory specified by the </span><code style="font-family: monospace, sans-serif;"><span class="Apple-style-span" style="background-color: #6aa84f;"><span class="Apple-style-span" style="font-size: small;">java.ext.dirs</span></span></code><span class="Apple-style-span" style="font-size: small;"> system property). It is implemented by the </span><code style="font-family: monospace, sans-serif;"><span class="Apple-style-span" style="background-color: #6aa84f;"><span class="Apple-style-span" style="font-size: small;">sun.misc.Launcher$ExtClassLoader</span></span></code><span class="Apple-style-span" style="font-size: small;"> class.</span></div><div style="line-height: 1.5em; margin-bottom: 0.5em; margin-left: 0px; margin-right: 0px; margin-top: 0.4em;"><span class="Apple-style-span" style="font-size: small;">The system class loader loads code found on </span><code style="font-family: monospace, sans-serif;"><span class="Apple-style-span" style="background-color: #6aa84f;"><span class="Apple-style-span" style="font-size: small;">java.class.path</span></span></code><span class="Apple-style-span" style="font-size: small;">, which maps to the system </span><code style="font-family: monospace, sans-serif;"><a href="http://en.wikipedia.org/wiki/Classpath_(Java)" style="-webkit-background-clip: initial; -webkit-background-origin: initial; background-attachment: initial; background-image: none; background-repeat: initial; color: #002bb8; text-decoration: none;" title="Classpath (Java)"><span class="Apple-style-span" style="font-size: small;"><span class="Apple-style-span" style="background-color: #6aa84f;">CLASSPATH</span></span></a></code><span class="Apple-style-span" style="font-size: small;"> variable. This is implemented by the </span><code style="font-family: monospace, sans-serif;"><span class="Apple-style-span" style="background-color: #6aa84f;"><span class="Apple-style-span" style="font-size: small;">sun.misc.Launcher$AppClassLoader</span></span></code><span class="Apple-style-span" style="font-size: small;"> class.</span></div></span></div>Lambert Leonardhttp://www.blogger.com/profile/15724107357609635064noreply@blogger.com0tag:blogger.com,1999:blog-8833213819696515180.post-15903032917398700952010-02-24T01:09:00.000-08:002010-02-24T01:09:41.438-08:00MyEclipse Subscription Code<a href="http://www.mediafire.com/file/mjqm1lljz1n/myeclipse_6.0_keygen.rar">http://www.mediafire.com/file/mjqm1lljz1n/myeclipse_6.0_keygen.rar</a>Lambert Leonardhttp://www.blogger.com/profile/15724107357609635064noreply@blogger.com0tag:blogger.com,1999:blog-8833213819696515180.post-90314919823445819122009-03-09T22:00:00.000-07:002009-03-09T22:00:52.308-07:00Prem Prakash<div style="MARGIN: 0px auto 10px; TEXT-ALIGN: center"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEga3TURcuyY4yr2A1iF5GR44NNzuZv45nVr4-gFxMJbWRG601eXQmZ_mfPGtuB0Ro5vCVLP-4fqXNbagNSr0o59OmuXXGZ1fv9k5KFdh5dAUxcmGEC8QOSWM37C6cszQBUldWEkrOQJCNk/s1600-h/DSC00002.JPG"><img alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEga3TURcuyY4yr2A1iF5GR44NNzuZv45nVr4-gFxMJbWRG601eXQmZ_mfPGtuB0Ro5vCVLP-4fqXNbagNSr0o59OmuXXGZ1fv9k5KFdh5dAUxcmGEC8QOSWM37C6cszQBUldWEkrOQJCNk/s400/DSC00002.JPG" border="0" /></a> </div><div style='clear:both; text-align:CENTER'><a href='http://picasa.google.com/blogger/' target='ext'><img src='http://photos1.blogger.com/pbp.gif' alt='Posted by Picasa' style='border: 0px none ; padding: 0px; background: transparent none repeat scroll 0% 50%; -moz-background-clip: initial; -moz-background-origin: initial; -moz-background-inline-policy: initial;' align='middle' border='0' /></a></div>Lambert Leonardhttp://www.blogger.com/profile/15724107357609635064noreply@blogger.com1