如何听按键并触发JButton?Java听按钮和键盘单击
例如:
我有 “A” 的JButton作为面板上的GUI。我在“aButton”上实现了一个buttonListener,它会将屏幕更改为其他内容。我希望这个按钮可以通过点击鼠标和键盘来触发。
如何在触发此“A”JButton的同时按下键盘上的“a”,同时还实现了buttonListener?
我目前的代码无法触发按键事件。
ButtonListener listener;
KeyboardListener keyboardListener;
private JButton aButton;
public MyButtonPanel() {
listener = new ButtonListener();
aButton = new JButton ("A");
aButton.setFont (BUTTON_TEXT);
aButton.setPreferredSize (new Dimension (60,30));
aButton.addActionListener (listener);
aButton.addKeyListener (keyboardListener);
setLayout (new BorderLayout());
add (aButton, BorderLayout.CENTER);
}
private class KeyboardListener implements KeyListener
{
public void keyPressed(KeyEvent arg0) {
char c = arg0.getKeyChar();
System.out.println("Pressed " + c);
}
public void keyReleased(KeyEvent arg0) {
char c = arg0.getKeyChar();
System.out.println("Released " + c);
}
public void keyTyped(KeyEvent arg0) {
char c = arg0.getKeyChar();
System.out.println("Typed " + c);
}
}
private class ButtonListener implements ActionListener {
public void actionPerformed (ActionEvent event) {
Object source = event.getSource();
if (source == aButton) {
System.out.println("This is a");
}
}
}
}
请阅读有关助记符的在这里http://docs.oracle.com/javase/tutorial/uiswing/components/button.html 有一些JButton键盘笔画链接的例子 – Sean 2012-02-16 15:51:34
我明白了所以我可以使用像这样b3.setMnemonic(KeyEvent.VK_E); b3.setActionCommand(“enable”); – nowhere 2012-02-16 16:07:50