From abe94e7b76b081c8d1180f1c9b0dea5b2ac2e3e5 Mon Sep 17 00:00:00 2001
From: nxist2202005086 <304907878@qq.com>
Date: Sat, 15 Jun 2024 22:47:15 +0800
Subject: [PATCH] Add timer

---
 timer | 138 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 timer

diff --git a/timer b/timer
new file mode 100644
index 0000000..932ae46
--- /dev/null
+++ b/timer
@@ -0,0 +1,138 @@
+import javax.swing.*;  
+import java.awt.HeadlessException;  
+import java.awt.BorderLayout;  
+import java.awt.FlowLayout;  
+import java.awt.Font;  
+import java.awt.event.ActionListener;  
+import java.awt.event.ActionEvent;  
+
+public class Timer extends JFrame {  
+	private static final String INITIAL_LABEL_TEXT = "00:00:00";  
+   
+    // 计数线程  
+    private CountingThread thread = new CountingThread();  
+   
+    // 记录程序开始时间  
+    private long programStart = System.currentTimeMillis();  
+   
+    // 程序一开始就是暂停的  
+    private long pauseStart = programStart;  
+   
+    // 程序暂停的总时间  
+    private long pauseCount = 0;  
+   
+    private JLabel label = new JLabel(INITIAL_LABEL_TEXT);  
+   
+    private JButton startPauseButton = new JButton("暂停");  
+   
+    private JButton resetButton = new JButton("清零");  
+   
+    private ActionListener startPauseButtonListener = new ActionListener() {  
+        public void actionPerformed(ActionEvent e) { 
+            if (thread.stopped) {  
+                pauseCount += (System.currentTimeMillis() - pauseStart);  
+                thread.stopped = false; 
+                startPauseButton.setText("暂停");    
+                } else {  
+                pauseStart = System.currentTimeMillis();	
+                thread.stopped = true;
+                startPauseButton.setText("继续");
+            }  
+        }  
+    };  
+   
+    private ActionListener resetButtonListener = new ActionListener() {  
+        public void actionPerformed(ActionEvent e) {  
+            pauseStart = programStart;  
+            pauseCount = 0;  
+            thread.stopped = true;  
+            label.setText(INITIAL_LABEL_TEXT);  
+            startPauseButton.setText("暂停");  
+            
+        }  
+    };  
+   
+    public Timer(String title) throws HeadlessException {  
+        super(title);  
+        setDefaultCloseOperation(EXIT_ON_CLOSE);  
+        setLocation(300, 300);  
+        setResizable(true);  
+        setupBorder();  
+        setupLabel(); 
+        if (thread.stopped == false) {
+			setupButtonsPanel();
+		}
+          
+        
+        startPauseButton.addActionListener(startPauseButtonListener);  
+        resetButton.addActionListener(resetButtonListener); 
+
+        thread.start(); // 计数线程一直就运行着  
+    }  
+   
+    // 为窗体面板添加边框  
+    private void setupBorder() {  
+    	
+        JPanel contentPane = new JPanel(new BorderLayout());  
+        contentPane.setBorder(BorderFactory.createEmptyBorder(50, 50, 50, 50));  
+        this.setContentPane(contentPane);  
+    }  
+   
+     //配置按钮  
+    private void setupButtonsPanel() {  
+        JPanel panel = new JPanel(new FlowLayout());  
+        panel.add(startPauseButton);
+        panel.add(resetButton);  
+        add(panel, BorderLayout.SOUTH);  
+     }  
+   
+    // 配置标签  
+    private void setupLabel() {  
+        label.setHorizontalAlignment(SwingConstants.CENTER);  
+        label.setFont(new Font(label.getFont().getName(), label.getFont().getStyle(), 40));  
+        this.add(label, BorderLayout.CENTER);  
+    }  
+   
+    private class CountingThread extends Thread {  
+   
+        public boolean stopped = false;  
+   
+        private CountingThread() {  
+            setDaemon(true);  
+        }  
+   
+        @Override  
+        public void run() {  
+            while (true) {  
+                if (!stopped) {  
+                    long elapsed = System.currentTimeMillis() - programStart - pauseCount;  
+                    label.setText(format(elapsed));  
+                    
+                }  
+   
+                try {  
+                    sleep(1);  // 1毫秒更新一次显示
+                } catch (InterruptedException e) {  
+                    e.printStackTrace();  
+                    System.exit(1);  
+                }  
+            }  
+        }  
+   
+        // 将毫秒数格式化  
+        private String format(long elapsed) {  
+           int hour, minute, second, milli;  
+            elapsed = elapsed / 1000;  
+   
+            second = (int) (elapsed % 60);  
+            elapsed = elapsed / 60;  
+   
+            minute = (int) (elapsed % 60);  
+            elapsed = elapsed / 60;  
+   
+            hour = (int) (elapsed % 60);  
+   
+            return String.format("%02d:%02d:%02d", hour, minute, second);
+        }  
+    }  
+}