JavaSwing按钮键盘快捷键

我想给Swing按钮添加一个快捷键，在键盘上按这个键时相当于用鼠标按下该键（注意！！！！！不用按Alt键应也能相应！如计算器的按钮功能，按"1"输入一，按"2"输入二），不知应调用哪个方法（函数）？求大虾指点！！！注意，我刚才说过，不用按Alt键应也能相应！千万别忘了！！

貌似是KeyListener里面的常量。 比如0-9就是 VK_0,VK-1..........VK_9
上下左右则是 VK_UP, VK_DOWN, VK_LEFT, VK_RIGHT
package test;

import java.awt.Button;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JFrame;

public class MyTest extends JFrame{

public void MyTest(){
this.setSize(400,500);
this.setVisible(true);
Button button = new Button("回车");
button.setBounds(20, 20, 80, 20);
this.add(button);

button.addKeyListener(new KeyAdapter(){

public void keyPressed(KeyEvent e) {
if(e.getKeyCode()==KeyEvent.VK_ENTER){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_UP){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_DOWN){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_RIGHT){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_LEFT){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_0){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_0){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_1){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_2){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_3){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_F1){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_F2){
System.out.print(e.getKeyText(e.getKeyCode()));
}
if(e.getKeyCode()==KeyEvent.VK_F3){
System.out.print(e.getKeyText(e.getKeyCode()));
}
}
});
this.setFocusable(true);
}
public static void main(String[] args) {
new MyTest().MyTest();
}

}
望采纳！！！！