eHow Java

Maven 2 version, a single command to update version of parent and sub modules(projects)

2010-07-07T10:08:00.000-07:00

Here's the Single command to change the version of the Parent project and sub modules in Maven 2

mvn -N versions:set -DnewVersion=0.0.4-SNAPSHOT

String to Police Alphabet(Alpha, Bravo,Charlie,Delta)

2010-06-14T05:32:00.000-07:00

The Result is:

Simple mail sender example with javamail

2010-01-23T03:45:00.000-08:00

Here's working sample of javamail example to send a mail.

/**
* @param args input param
* @throws Throwable throws any exception
*/
public static void main(final String[] args) throws Throwable {

Properties propMgr = PropertyManager.load("system.properties");
final Properties props = new Properties();
props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.host", "smtp.mymailserver.com");
props.setProperty("mail.user", "username");
props.setProperty("mail.password", "password");
final Session mailSession = Session.getDefaultInstance(props, null);
mailSession.setDebug(true);
final Transport transport = mailSession.getTransport();
final MimeMessage message = new MimeMessage(mailSession);
message.setSubject("HTML mail with images");
message.setFrom(new InternetAddress("sender@company.com"));
message.setContent("Cheers,Cashyup", "text/html");
message.addRecipient(Message.RecipientType.TO,
new InternetAddress(
"receiver@company.com"));
transport.connect();
transport.sendMessage(message, message
.getRecipients(Message.RecipientType.TO));
transport.close();
}

Simple programming - Java property loader

2010-01-21T08:23:00.000-08:00

Java Method:
/**
* Load a properties file from the application classpath
* @param propsName Property file name
* @return Properties Properties
* @throws IOException
*/
public static Properties load(final String propsName) throws IOException {
     if(LOGGER.isDebugEnabled()){LOGGER.debug("Entry");}
     final Properties props = new Properties();
     final URL url = ClassLoader.getSystemResource(propsName);
     props.load(url.openStream());
     if(LOGGER.isDebugEnabled()){LOGGER.debug("Exit");}
     return props;
}

Property file:system.properties
     name=cashyup
     passowrd=rukidding

Usage: Load properties and find specific property
     Properties propMgr = PropertyManager.load("system.properties"); //Loads properties
     //Properties propMgr = PropertyManager.load("com/kshan/util/alphabet.properties");
     LOGGER.info(propMgr.get("username")); //find a property by key

feature.xml problems in Eclipse

2010-01-21T05:53:00.000-08:00

You might see a problem when you manually install a plugin/features in Eclipse.

The Error could be "Error retrieving feature.xml" or "could not find the end of central directory features.xml" or something like "not found features.xml end of file"

When you try to install a new plugin with Help->Software Updates->Find and install , this error will occur and you can not install the new one. And you wonder, what is the problem?

Let me guess, when you installed your last Eclipse plugin, you just downloaded the package and unzip or just put it into Eclipse's root directory, without using the software updates tool in help menu in Eclipse.

Here's how you can fix it.

1. Delete the {ECLIPSE_HOME}/site.xml.

2. Run Help->Software Updates->Find and install. (The error should disappear).

If The plugin has a update site, you can install it in Eclipse using Help->Software Updates->Find and install.

Manual download and unzip it into your Eclipse directory is NOT advisable.

Google Search

2010-01-01T10:10:00.000-08:00