Java是一款流行的編程語(yǔ)言，它可以使用按鍵和倒計(jì)時(shí)進(jìn)行綁定。

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class CountdownTimer implements KeyListener {
private JFrame frame;
private JLabel countdownLabel;
public CountdownTimer() {
frame = new JFrame("倒計(jì)時(shí)器");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
countdownLabel = new JLabel("10", JLabel.CENTER);
frame.add(countdownLabel);
frame.addKeyListener(this);
frame.setSize(300, 200);
frame.setVisible(true);
}
public static void main(String[] args) {
new CountdownTimer();
}
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_SPACE) {
int secondsRemaining = Integer.parseInt(countdownLabel.getText());
secondsRemaining--;
if (secondsRemaining >= 0) {
countdownLabel.setText("" + secondsRemaining);
} else {
frame.dispose();
}
}
}
@Override
public void keyReleased(KeyEvent e) {}
@Override
public void keyTyped(KeyEvent e) {}
}

以上代碼實(shí)現(xiàn)了一個(gè)簡(jiǎn)單的倒計(jì)時(shí)器。在窗口中顯示一個(gè)標(biāo)簽，標(biāo)簽中顯示10。當(dāng)用戶按下空格鍵時(shí)，倒計(jì)時(shí)開(kāi)始并且每按一次空格鍵，倒計(jì)時(shí)減一秒。當(dāng)?shù)褂?jì)時(shí)結(jié)束時(shí)，窗口關(guān)閉。