【Matlab编程】Matlab及Java小时钟

一年前曾经用matlab的gui做了一个时钟，由于是直接用GUIDE和ActiveX控件写的，程序虽说有许多行，大多数都是自动生成的，自己写的只有十几行而已。闲着没事，就耗费了下午的时间用matlab和Java分别又写了写。具体代码如下：

1.matlab脚本文件：

%%%%%%%%%%%%%%%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

2.Java应用文件(文件名为MyClock.java)

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();
 
 }
}

运行结果如下图：

1.matlab时钟界面:

2.Java时钟界面

原文：http://blog.csdn.net/tengweitw/article/details/21468723

作者：nineheadedbird