Java/com/study/demo11/CountdownTimer.java

package com.study.demo11;

import java.awt.Button;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Label;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Timer;
import java.util.TimerTask;

public class CountdownTimer extends Frame {
    private Button sendButton;
    private Label statusLabel;
    private int remainingSeconds = 10;
    private Timer timer;

    public CountdownTimer() {
        super("按钮控制器");

        sendButton = new Button("发送验证码");
        statusLabel = new Label("", Label.CENTER);

        sendButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                startCountdown();
            }
        });

        setLayout(new FlowLayout());
        add(sendButton);
        add(statusLabel);

        setSize(300, 150);
        setLocationRelativeTo(null);
        setVisible(true);
    }

    private void startCountdown() {
        sendButton.setEnabled(false);
        remainingSeconds = 10;

        timer = new Timer();
        timer.scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                remainingSeconds--;
                if (remainingSeconds > 0) {
                    statusLabel.setText("剩余时间：" + remainingSeconds + "秒");
                } else {
                    timer.cancel();
                    sendButton.setEnabled(true);
                    statusLabel.setText("可以重新发送");
                }
            }
        }, 1000, 1000);
    }

    public static void main(String[] args) {
        new CountdownTimer();
    }
}