Question

求高手帮忙写个JAVA程序，图形时钟

显示时钟。编写程序显示一个时钟。示例输出如图所示，有时针分针秒针，可以显示当前时间
可以用的给50加分

Answer 1

package com.clock;

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.Date;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class ClockPanel extends JPanel{

private static final long serialVersionUID = 4523747293746641642L;

@Override
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D)g;
g2d.setStroke(new BasicStroke(3));
g2d.drawOval(50,50,400,400);//圆点为（250,250）
for(int i = 0;i < 60;i++){
int[] t = getPoint(i*6,200);
int[] t1 = new int[2];
if(i%5 == 0){
if(i%3 == 0){
g2d.setStroke(new BasicStroke(3));
t1 = getPoint(i*6,180);
}else{
g2d.setStroke(new BasicStroke(2));
t1 = getPoint(i*6,190);
}
}else{
g2d.setStroke(new BasicStroke(1));
t1 = getPoint(i*6,195);
}
g2d.drawLine(t[0], t[1], t1[0], t1[1]);
}
Date d = new Date();
int h = d.getHours();
int m = d.getMinutes();
int s = d.getSeconds();

double arc_s = s * 6 + 90;
double arc_m = (m + s/60.0) * 6 + 90;
double arc_h = 0;
if(h > 12)
h = h - 12;
arc_h = (h + m / 60.0) * 30 + 90;
int[] st = getPoint(arc_s,160);
int[] mt = getPoint(arc_m,130);
int[] ht = getPoint(arc_h,90);

g2d.setStroke(new BasicStroke(1));
g2d.setColor(Color.BLACK);
g2d.drawLine(250,250,st[0],st[1]);

g2d.setStroke(new BasicStroke(2));
g2d.setColor(Color.RED);
g2d.drawLine(250,250,mt[0],mt[1]);

g2d.setStroke(new BasicStroke(3));
g2d.setColor(Color.BLUE);
g2d.drawLine(250,250,ht[0],ht[1]);

g2d.setColor(Color.RED);
Font font = new Font("新宋体",Font.BOLD,17);
g2d.setFont(font);
g2d.drawString("Hour: "+h+" Minute: "+m+" Second: "+s, 150, 500);

}

public int[] getPoint(double arc,int r){
double sin = Math.sin(Math.toRadians(arc));
double cos = Math.cos(Math.toRadians(arc));
return new int[]{(int)(250-r*cos),(int)(250-r*sin)};
}

public static void main(String[] args){
final JFrame frame = new JFrame();
frame.add(new ClockPanel(), BorderLayout.CENTER);
frame.setTitle("Clock!");
frame.setSize(600, 600);
frame.setLocation(100, 100);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);
frame.setVisible(true);
new Thread(new Runnable(){
@Override
public void run() {
while(true){
frame.repaint();
try{
Thread.currentThread().sleep(1000);
}catch(InterruptedException e){
e.printStackTrace();
}
}
}

}).start();
}

}

Answer 2

自己慢慢做咯