Java/com/study/demo11/TimeLogger.java

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();
    }
}