JAVA时钟代码

6年前，课程设计，用C语言写了个小钟。6年后，一时兴起，用Java写一个小钟。

6年前，用了一个星期；6年后，用了半个小时。

6年前，书生意气，挥斥方遒；6年后，人未老心已老，未语泪先流。

不得不说，时间是把杀猪刀。

package com.JavaClock.UI;import java.awt.*;import java.awt.event.*;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import javax.swing.*;import java.util.Timer;import java.util.TimerTask;import java.util.*;public class MainFrame extends JFrame implements Runnable{private int width = 500;private int height = 500;private int hour = 1;private int minute = 1;private int second = 1;//半径private double R = (width-100)/2.0;private double P =  Math.PI/6;private boolean tag = true;private Map<Integer,Double> xMap = new HashMap<Integer,Double>();private Map<Integer,Double> yMap = new HashMap<Integer,Double>();public MainFrame() {this.setTitle("我的小钟");this.setSize(new Dimension(width,height));this.setLocation(200,200);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setVisible(true);        for(int i=1;i<=12;i++) {double e = P*i;double x = Math.sin(e)*R + R + 50;double y = R + 50 - Math.cos(e)*R ;xMap.put(i, x);yMap.put(i, y);}new Thread(this).start();}public int calX(double P,int i,int R1){double e = P*i;double x = Math.sin(e)*R1 + R + 50;return (int)x;}public int calY(double P,int i,int R1){double e = P*i;double y = R + 50 - Math.cos(e)*R1 ;return (int)y;}public void paint(Graphics g){Graphics2D g2 = (Graphics2D) g;//钟的背景和钟盘只绘制一次g2.setColor(Color.BLACK);g2.fillRect(0,0,width,height);g2.setColor(Color.BLUE);g2.drawOval(35,35,width-70,height-70);double x = 0, y = 0;for(int i=1;i<=12;i++) {double e = P*i;x = xMap.get(i);y = yMap.get(i) ;g2.drawString(String.valueOf(i),(int)x,(int) y);}tag = false;//绘制钟心g2.fillRect(30+(width-70)/2,30+(height-70)/2,10,10);//绘制数字时钟g2.drawString(hour+":"+minute+":"+second,20 + (width-75)/2,100);//绘制时针g2.setColor(Color.RED);if(hour>12){hour -= 12;}g2.drawLine(35+(width-70)/2,35+(width-70)/2,calX(Math.PI/6+Math.PI/120,hour,60), calY(Math.PI/6+Math.PI/120,hour,60));//绘制分针g2.setColor(Color.YELLOW);g2.drawLine(35+(width-70)/2,35+(width-70)/2,calX(Math.PI/30,minute,100), calY(Math.PI/30,minute,100));//绘制秒针g2.setColor(Color.GREEN);g2.drawLine(35+(width-70)/2,35+(width-70)/2,calX(Math.PI/30,second,150), calY(Math.PI/30,second,150));g2.dispose();}public void run() {Timer timer = new Timer();timer.schedule(new TimerTask(){public void run() {hour = new java.util.Date().getHours();minute = new java.util.Date().getMinutes();second = new java.util.Date().getSeconds();repaint();}},0,1000);}public static void main(String[] args){MainFrame mainf = new MainFrame();}}

代码写得粗糙了点，仅为祭奠我的青春，我的18岁。