jdbc batch update

import java.sql.*;
class BatchUpdateDemo
{
    public static void main(String[] args)throws Exception   
    {
        Class.forName("oracle.jdbc.driver.OracleDriver");
        Connection con=DriverManager.getConnection
        ("jdbc:oracle:thin:@localhost:1521:xe","system","chandru");
        System.out.println(" Connected 2 DB.....");
        
        con.setAutoCommit(false);
        Statement stmt=con.createStatement();
        String vsql1="insert into emp2 values(1231,'chandu',100)";
        String vsql2="insert into emp2 values(1224,'chandu',100)";
        String vsql3="insert into emp2 values(1233,'chandu',100)";
        
        try
        {
         stmt.clearBatch();
         stmt.addBatch(vsql1);
         stmt.addBatch(vsql2);
         stmt.addBatch(vsql3);
         stmt.executeBatch();
         con.commit();//without commit the data won't be effected in DB.
        }
// any of the above addBatch fail whole transaction rooBack
        catch(Exception e)
        {
          con.rollBack();
        }
         System.out.println("Data has been entered successfully. ....");

    }
}