import java.awt.*;
import javax.swing.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

class  JavaGUI{
    public static void main(String[] args){
    JFrame f=new JFrame();
     JTextField text1=new JTextField(20);
     final JTextField text2=new JTextField(20);
        text1.addKeyListener(new KeyAdapter() {
          public void keyReleased(KeyEvent e) {
            if( e.getKeyCode() == KeyEvent.VK_ENTER ){
             text2.requestFocus();
            }
          }
        });
        JPanel p=new JPanel(new GridLayout(2,1));
        p.add(text1);
        p.add(text2);
        f.add(p);
        f.setVisible(true);
        f.pack();
    }
}

ya...very vry thanx dude.... its very helpful 2 me....

KeyEvent.VK_ENTER is for getting enterkey. then how can get other keys...?