Java Blog Plex by Java Developers

Empowering Java Development, Now Java Developer Community have another leading IDE open sourced.
JetBrains has announced that, starting with the next release – version 9.0, it will offer its IntelliJ IDEA Java development environment as open source software. IntelliJ IDEA is to become available in two versions;  a free and open source Community Edition, [...]

On 1st September JBoss released jBPM 4.1 with some extra ordinary features & commitments. The most significant feature add is Signavio and Oryx collaboration that gives the web based BPMN graphical designer.

The web based PDL designer is now implicit part the of jBPM 4.1 package, no need to do anything extra.
Features added are below:

End-to-end demo: [...]

Java Virtual Machine maintains an internal list of references for interned Strings ( pool of unique Strings) to avoid duplicate String objects in heap memory. Whenever the JVM loads String literal from class file and executes, it checks whether that String exists in the internal list or not. If it already exists in the list, then it  [...]

Implementing serialization in Java is pretty straight forward just a little step task. The class you want to be serialized just have to implements a marker Interface Serializable no override nothing extra work.
The JVM will take care of serialization and deserialization process automatically. Now you can write your object to any persistent technology e.g. database, [...]

With the most strong JSF + Richfaces framework combination for Java Ajax application, it is very easy to call server side methods from client side java script or call your server side event method from other jsf component easily. Following is the smart & small tip to do this.
<rich:simpletogglepanel label=”Sample Page” onexpand=”buildPage()”></rich:simpletogglepanel>
<a4j:jsfunction name=”buildPage” action=”#{controller.buildAllPage}” reRendr=”grid” [...]

JSF RIA based applications with richfaces comes with very common, mature and stable choice. Infact, richfaces is mature enough technology for implementing AJAX, rich user interfaces easily in JSF. I am sharing some of the common best practices for optimizing JSF richfaces application. 
<context-param>
        <param-name>org.ajax4jsf.COMPRESS_SCRIPT</param-name>
        <param-value>true</param-value>
</context-param>
This config will enforce the container to [...]

These are my SCJP certification kit Sun. I was very happy and exited to receive on of my biggest wish to come true about ever wanted Sun certification. You can see my SCJP certificates + nice visting type card that I can put in my pocket voilet. Now, with the great success and passion with [...]

/*
This class check the prime number between 1 to 1000 and write the prime number.
*/
public class PrimeNumber
{
// This method tests whether a given number is prime or not.
public static boolean isPrime ( int num )
{
boolean prime = true;
int limit = (int) Math.sqrt ( num );
for ( int i = 2; i <= limit; i++ )
{
if [...]

The JDBC is used whenever a Java application should communicate with a relational database for which a JDBC driver exists. JDBC is part of the Java platform standard; all visible classes and interfaces used in the JDBC are placed in package Java
Main JDBC classes:
Download the Java connecting with Oracle Code, you have to [...]

Java supports the custom, user defined exception. Java provides the well known and common exception classes and gives freedom for developer to create their own exception classes matching to their specific business logic/role. For example, a user not found exception would be implemented by its own.
Download the Java Source code  for creating user custom exceptions
MyException.java  [...]