JTextField

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

public class Exercicio extends JFrame implements FocusListener,KeyListener{

    JLabel Nome, End, Idade;
    JTextField txt1, txt2, txt3;
    
    public Exercicio ()
    	{
    	
    	setSize(800, 600);
    	setTitle("Exercício Aula 4 - 09.08.2009");
    	setVisible(true);
    	setDefaultCloseOperation(EXIT_ON_CLOSE);
    	
    	txt1 = new JTextField();
    	txt1.setBounds(100,10,300,30);
    	txt1.addKeyListener(this);
 //  	txt1.addFocusListener(this);

    	txt2 = new JTextField();
    	txt2.setBounds(100,50,300,30);
    	txt2.addKeyListener(this);
 //  	txt2.addFocusListener(this);

    	txt3 = new JTextField();
    	txt3.setBounds(100,90,300,30);
    	txt3.addKeyListener(this);
//   	txt3.addFocusListener(this);

        
    	Nome = new JLabel("Nome");
    	Nome.setBounds(10,10,280,20);
        
    	End = new JLabel("Endereço");
    	End.setBounds(10,50,280,20);
        
    	Idade = new JLabel("Idade");
    	Idade.setBounds(10,90,280,20);
        
        getContentPane().setLayout(null);
       	getContentPane().add(txt1);
    	getContentPane().add(txt2);
    	getContentPane().add(txt3);
    	getContentPane().add(Nome);
    	getContentPane().add(End);        	
    	getContentPane().add(Idade); 
   	
    }
    
        public void keyPressed(KeyEvent e){
     	if(e.getSource()==txt1)
            if(e.getKeyCode()==10){
     		txt2.requestFocus();
     		}
        if(e.getSource()==txt2)
            if(e.getKeyCode()==10){
                txt3.requestFocus();
            }
    	}
    	
        public void focusGained(FocusEvent ee){
	   	}

        public void focusLost(FocusEvent ef){
	   	}

    public void keyTyped(KeyEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    public void keyReleased(KeyEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    }
    
    public static void main (String args[]){
        Exercicio exe = new Exercicio();    
        
    }
	   	
   
    
    
}