[Java] Matlab及Java实现小时钟效果

%%%%%%%%%%%%%%%设置图像属性并获取图像句柄%%%%%%%%%%%%%%%%%%%%%%%%%%%
h=figure('name','我的时钟','NumberTitle','off','color',[1 1 0]);
set(h,'menubar','none','position',[200,200,400,450]);
%%%%%%%%%%%%画出时钟的外轮廓%%%%%%%%%%%%%%
s1=[0:pi/1000:2*pi];
hl=plot(2*cos(s1),2*sin(s1),'black','linewidth',1.5);
axis equal
title('我的时钟');
hold on
%%%%%%%%%%%绘制表盘刻度%%%%%%%%%%%%%%%%%%
for n=pi*2:-pi/30:pi/30     %绘制表盘，绘制分钟的刻度
  a1=0.95*cos(n):0.000005*cos(n)/2:cos(n);b1=0.95*sin(n):0.000005*sin(n)/2:sin(n);
  plot(2*a1,2*b1,'r-');
end
for n=pi*2:-pi/6:pi/30    %绘制表盘，绘制小时的刻度
  a1=0.9*cos(n):0.1*cos(n)/2:cos(n);b1=0.9*sin(n):0.1*sin(n)/2:sin(n);
  plot(2*a1,2*b1,'r-');
end
text(1.5,0,'3','FontSize',12)
text(-0.05,-1.7,'6','FontSize',12)
text(-1.7,0,'9','FontSize',12)
text(-0.1,1.7,'12','FontSize',12)
%%%%%%%%%%%%%%%%获取当前时间并进行角度与弧度转换%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 axis([-2.1 2.1 -2.1 2.1])
   time=datestr(now);
  sec=pi/2-str2num(time(19:20))*pi/30;  
  min=pi/2-(str2num(time(16:17))+sec/60)*pi/30;               
  hour=pi/2-(str2num(time(13:14))+min/60)*pi/6; 
 w1=-pi/30; 
 w2=-pi/1800; 
 w3=-pi/108000; 
 pausetime=1;
 %%%%%%%%%%%%%%%%开始绘图并不断刷新%%%%%%%%%%%%
while 1
  axis off  
  x1=0:0.75*cos(sec)/2:0.75*cos(sec);y1=0:0.75*sin(sec)/2:0.75*sin(sec); %根据秒针的位置绘制分针
  x2=0:0.6*cos(min)/2:0.6*cos(min);y2=0:0.6*sin(min)/2:0.6*sin(min); %根据分针的位置绘制分针 
  x3=0:0.45*cos(hour)/2:0.45*cos(hour);y3=0:0.45*sin(hour)/2:0.45*sin(hour); %根据时针的位置绘制分针
  hp1=plot(2*x1,2*y1,'r-','linewidth',1.5);
  hp2=plot(2*x2,2*y2,'b-','linewidth',2);
  hp3=plot(2*x3,2*y3,'g-','linewidth',3.5);
  sec=sec+w1*pausetime;  %计算一秒以后秒针的角度位置
  min=min+w2*pausetime;  %计算一秒以后分针的角度位置
  hour=hour+w3*pausetime;
  pause(1);
  delete(hp1);
  delete(hp2);
  delete(hp3);
end

import java.awt.*;
import java.util.GregorianCalendar;
import javax.swing.*;
import javax.swing.Timer;
import java.util.*;
import java.awt.event.*;
public class MyClock extends JPanel 
{
 
 final double RAD=Math.PI/180;//角度与弧度的转化
 
 
 public void paint(Graphics g)
 {
 super.paint(g);//调用父类方法
   Graphics2D g2=(Graphics2D)g;//主要用于改变线条粗细
   int h=getSize().height;//获取窗口的长和宽，主要用于当用鼠标改变窗口时，时钟也跟着变化
   int w=getSize().width;
 int hour,min,sec,hh,mm,ss;
 double x,y;
 setBackground(Color.yellow);//设置背景值
  g.setColor(Color.black);//画笔颜色
  int r=(Math.min(h, w)/2-50);
  float x0=w/2;//时钟中心位置
  float y0=h/2;
  
  g2.setFont(new Font("楷体",Font.PLAIN,20));
  g2.drawString("我的时钟",165, 50);
  g2.setFont(new Font("Times New Roman",Font.PLAIN,20));
  g2.drawString("Designed by TW",235, 420);
  
  g.drawString("12",(int)(w/2)-5,(int)(h/2)-r+30);
  g.drawString("3",(int)(w/2)-25+r,Math.round(h/2)+10);
  g.drawString("6",(int)(w/2),(int)(h/2)+r-20);
  g.drawString("9",(int)(w/2)-r+20,Math.round(h/2)+10);
   
  //设置分钟刻度 之所以没有用线条，主要是因为drawline的参数要求是整数，因此刻度会不准确
  for(int i=1;i<=12;i++)
  {
    double buffer=Math.PI*(0.5-i/6.0);
    int posX = (int)Math.round(x0+r*Math.cos(buffer));
    int posY = (int)Math.round(y0-r*Math.sin(buffer));
    g.setColor(Color.red);
    g.fill3DRect(posX, posY, 8, 8, true);
    }
  //设置秒钟刻度
  
  for(int i=1;i<60;i++)
  {
    if(i%5!=0)
    {
     double buffer= Math.PI*i/30.0;
     int posX = (int)Math.round(x0+r*Math.cos(buffer));
     int posY = (int)Math.round(y0-r*Math.sin(buffer));
     g.setColor(Color.black);
     g.fill3DRect(posX, posY, 6, 6, false);
    }
  }
   //获取当前系统时间
  
  GregorianCalendar date=new GregorianCalendar();
 hour=(int)date.get(Calendar.HOUR); 
 min=(int)date.get(Calendar.MINUTE); 
 sec=(int)date.get(Calendar.SECOND); 
 // System.out.println(hour);
 // System.out.println(min);
 // System.out.println(sec);
 //进行角度换算
 ss=90-sec*6;
  mm=90-min*6;
  hh=90-hour*30-min/2;
  //画出时分秒的指针 
  g2.setStroke(new BasicStroke(1.0f));
  x=(int)(r*0.9*Math.cos(RAD*ss)+x0);
  y=(int)(r*0.9*Math.sin(RAD*ss)+y0);
  g.setColor(Color.red);
  g.drawLine((int)(x0),(int)(y0),(int)x,(int)(h-y));
 
  g2.setStroke(new BasicStroke(2.2f));
  x=(int)(r*0.7*Math.cos(RAD*mm)+x0);
  y=(int)(r*0.7*Math.sin(RAD*mm)+y0);
  g.setColor(Color.blue);
  g.drawLine((int)x0,(int)y0,(int)x,(int)(h-y));
  g2.setStroke(new BasicStroke(3.4f));
  x=(int)(r*0.5*Math.cos(RAD*hh))+x0;
  y=(int)(r*0.5*Math.sin(RAD*hh))+y0;
  g.setColor(Color.green);
  g.drawLine((int)x0,(int)y0,(int)x,(int)(h-y));
 
 }
 
//设置窗口大小
 public Dimension getPreferredSize()
 {
 return new Dimension(400,450);
 }
// 
 public static void main(String[] args)
 {
  Graphics g=null;
  JFrame frame=new JFrame("我的时钟");
  Container contentPane=frame.getContentPane();
  final MyClock tw=new MyClock();
  contentPane.add(tw,BorderLayout.CENTER);
  frame.pack();
  frame.setVisible(true);
  //用于画板的刷新
  int delay=1000;
   //创建一个监听事件
   ActionListener drawClock=new ActionListener()
   {
   public void actionPerformed(ActionEvent evt)
   {
    tw.repaint();
   }
   };
   
   //创建一个时间计数器，每一秒触发一次
   new Timer(delay,drawClock).start();
  
 }
}