update:demo11

com/study/demo11/TimeLogger.java

@@ -0,0 +1,48 @@
+package com.study.demo11;
+
+import java.awt.Button;
+import java.awt.Frame;
+import java.awt.TextArea;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+public class TimeLogger extends Frame {
+    private Button logButton;
+    private TextArea logArea;
+    private DateTimeFormatter formatter;
+
+    public TimeLogger() {
+        super("时间记录器");
+        formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+
+        logButton = new Button("记录时间");
+        logArea = new TextArea(10, 40);
+        logArea.setEditable(false);
+
+        logButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                logTime();
+            }
+        });
+
+        add(logButton, java.awt.BorderLayout.NORTH);
+        add(logArea, java.awt.BorderLayout.CENTER);
+
+        setSize(400, 300);
+        setLocationRelativeTo(null);
+        setVisible(true);
+    }
+
+    private void logTime() {
+        LocalDateTime now = LocalDateTime.now();
+        String timeStr = "点击时间：" + now.format(formatter) + "\n";
+        logArea.append(timeStr);
+    }
+
+    public static void main(String[] args) {
+        new TimeLogger();
+    }
+}