update:demo11

com/study/demo11/CountdownTimer.java

@@ -0,0 +1,63 @@
+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();
+    }
+}