簡單示例（紅色為關鍵句）：

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

public class MyTest extends JFrame implements KeyListener{
private static final long serialVersionUID = -7206058252243611005L;
JPanel pan=new JPanel();
JTextField txt1=new JTextField();
JTextField txt2=new JTextField();
JTextField txt3=new JTextField();

public static void main(String[] args){
MyTest w =new MyTest();
w.setVisible(true);
}

MyTest(){
this.setSize(300,400);
pan.setLayout(new GridLayout(3,2));
pan.add(new JLabel("輸入1"));
pan.add(txt1);
pan.add(new JLabel("輸入2"));
pan.add(txt2);
pan.add(new JLabel("輸入3"));
pan.add(txt3);

this.add(pan);

txt1.addKeyListener(this);
txt2.addKeyListener(this);
txt3.addKeyListener(this);

}

@Override
public void keyPressed(KeyEvent arg0) {
// TODO Auto-generated method stub
int key= arg0.getKeyCode();
if (key==KeyEvent.VK_ENTER) {
arg0.getComponent().transferFocus();
}
}

@Override
public void keyReleased(KeyEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void keyTyped(KeyEvent arg0) {
// TODO Auto-generated method stub

}
}