Java_Home: C:\Program Files\Java\jdk1.7.0_07

Path: %Java_Home%\bin;%Java_Home%\jre\bin;

ClassPath: .;%Java_Home%\bin;%Java_Home%\lib\dt.jar;%Java_Home%\lib\tools.jar

public class HelloWorld{

  public static void main(String args[]){

    System.out.println("HelloWorld");

  }

}