clockapplet.java

一个模拟时钟的程序源码 开发环境:JAVA 有详细说明

import  java.awt.*;
import java.applet.Applet;
import java.util.Calendar;
import java.text.SimpleDateFormat;
import java.util.Date;


public class ClockApplet extends Applet implements Runnable //Applet支持线程
{
    private Thread athread;          //线程
    private SimpleDateFormat sdateformat;     //日期格式
    

  public void init()
     {

        this.setBackground(Color.white);
        this.athread = null;
  }
    public void paint(Graphics g)
    {
        this.sdateformat = new SimpleDateFormat("hh时mm分ss秒");
        g.drawString(this.sdateformat.format(new Date()),25,131);
        
        Calendar  rightnow = Calendar.getInstance();
        int second = rightnow.get(Calendar.SECOND);
        int minute = rightnow.get(Calendar.MINUTE);
        int hour = rightnow.get(Calendar.HOUR);
        
        //半径
        int R_H = 20,R_M = 4,R_S = 4;
        //时针的坐标
        //x ====(9-3)[0-6]   (3-9)[6-0]
        //y ====(12-6)[0-6]  (6-12)[6-0]
        int H_x ;
        int H_y;
        //x
        if(hour == 0)
        {
            hour = 12;
        }
        if( hour >= 3 && hour <= 9 )
        {
            H_x = R_H*Math.abs(hour - 9);
        }
        else
        {
            if(hour > 9)
            {
               H_x = R_H*Math.abs(hour - 9);
            }
            else
            {
                H_x = R_H*Math.abs(hour+3);
            }
        }
        //y
        if( hour >= 6 && hour <= 12 )
        {
            H_y = R_H*Math.abs(hour - 12);
        }
        else
        {
            H_y = R_H*hour;
        }
        
        //分针的坐标
        int M_x;
        int M_y;
        
        if(minute == 0)
        {
            minute = 60;
        }
        if( minute >= 15 && minute <= 45 )
        {
            M_x = R_M*Math.abs(minute - 45);
        }
        else
        {
            if(minute > 45)
            {
               M_x = R_M*Math.abs(minute - 45);
            }
            else
            {
                M_x = R_M*Math.abs(minute+15);
            }
        }
        //y
        if( minute >= 30 && minute < 60 )
        {
            M_y = R_M*Math.abs(minute - 60);
        }
        else
        {
            M_y = R_M*minute;
        }
        
        //秒针的坐标
        int S_x;
        int S_y;
        
        if(second == 0)
        {
            second = 60;
        }
        if( second >= 15 && second <= 45 )
        {
            S_x = R_S*Math.abs(second - 45);
        }
        else
        {
            if(second > 45)
            {
               S_x = R_S*Math.abs(second - 45);
            }
            else
            {
                S_x = R_S*Math.abs(second+15);
            }
        }
        //y
        if( second >= 30 && second <= 60 )
        {
            S_y = R_S*Math.abs(second - 60);
        }
        else
        {
            S_y = R_S*second;
        }
        
        
        
  //      g.drawString(String.valueOf(second),25,50);
//        g.drawString(String.valueOf(minute),25,60);
  //      g.drawString(String.valueOf(hour),25,70);
   //     g.drawString(String.valueOf(H_x),25,80);
  //      g.drawString(String.valueOf(H_y),25,90);
	g.drawOval(0,0,120,120);//距离相差10像素
        g.setColor(Color.darkGray);
        g.drawString("9",5,65);
        g.drawString("3",110,65);
        g.drawString("12",55,15);
        g.drawString("6",55,115);
        
        g.drawString("1",80,20);
        g.drawString("2",100,40);
        g.drawString("4",100,90);
        g.drawString("5",80,110);
        
        g.drawString("7",30,110);
        g.drawString("8",10,90);
        g.drawString("10",10,40);
        g.drawString("11",30,20);
        
        g.setColor(Color.red);
        g.drawLine(60,60,H_x,H_y);//前一个点表示起点，另一个表示终点
        g.setColor(Color.blue);
        g.drawLine(60,60,M_x,M_y);
        g.setColor(Color.yellow);
        g.drawLine(60,60,S_x,S_y);


    }
    public void start()
    {
        if(athread == null)
        {
            athread = new Thread(this);
            athread.start();
        }
    }
    public void stop()
    {
        if(athread != null)
        {
            athread.interrupt();
            athread = null;
        }
    }
    public void run()
    {
       while(athread != null)
        {
            repaint();
           try
            {
                athread.sleep(1000);
            }
            catch(InterruptedException e)
            {

            }
        }
    }

}