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本文实例为大家分享了java动态模拟时钟的具体代码，供大家参考，具体内容如下

应用名称：java动态模拟时钟

用到的知识：javaGUI，java 绘图

开发环境：win10+eclipse+jdk1.8

功能说明：通过java绘图画出一个虚拟的动态时钟

效果图：

源代码：

import javax.swing.*;

import java.awt.*;

import java.util.*;

import java.lang.Thread;

import java.text.DecimalFormat;

public class StillClock extends JPanel {

/**

* @param args

*/

private int hour;

private int minute;

private int second;

//构造函数

public StillClock() {

setCurrentTime();

}

//返回小时

public int getHour() {

return hour;

}

public int getMinute() {

return minute;

}

public int getSecond() {

return second;

}

//绘制时钟

protected void paintComponent(Graphics g) {

super.paintComponent(g);

//初始化

int clockRadius = (int)(Math.min(getWidth(),getHeight()) * 0.8 * 0.5);

int xCenter = getWidth() / 2;

int yCenter = getHeight() / 2;

//画圆

g.setColor(Color.black);

g.drawOval(xCenter - clockRadius,yCenter - clockRadius,2 * clockRadius,2 * clockRadius);

g.drawString("12",xCenter - 5,yCenter - clockRadius + 15);

g.drawString("9",xCenter - clockRadius + 3,yCenter + 5);

g.drawString("3",xCenter + clockRadius - 10,yCenter + 3);

g.drawString("6",xCenter - 3,yCenter + clockRadius - 3);

//画秒针

int sLength = (int)(clockRadius * 0.8);

int xSecond = (int)(xCenter + sLength * Math.sin(second * (2 * Math.PI / 60)));

int ySecond = (int)(yCenter - sLength * Math.cos(second * (2 * Math.PI / 60)));

g.setColor(Color.red);

g.drawLine(xCenter,yCenter,xSecond,ySecond);

//画分针

int mLenth = (int)(clockRadius * 0.65);

int xMinute = (int)(xCenter + mLenth * Math.sin(minute * (2 * Math.PI / 60)));

int yMinute = (int)(xCenter - mLenth * Math.cos(minute * (2 * Math.PI / 60)));

g.setColor(Color.blue);

g.drawLine(xCenter,xMinute,yMinute);

//画时针

int hLength = (int)(clockRadius * 0.5);

int xHour = (int)(xCenter + hLength * Math.sin((hour % 12 + minute / 60.0) * (2 * Math.PI / 12)));

int yHour = (int)(yCenter - hLength * Math.cos((hour % 12 + minute / 60.0) * (2 * Math.PI / 12)));

g.setColor(Color.green);

g.drawLine(xCenter,xHour,yHour);

//画数字时钟

g.setColor(Color.black);

DecimalFormat s=new DecimalFormat("00");

g.drawString(s.format(getHour()) + ":" + s.format(getMinute()) + ":" + s.format(getSecond()),xCenter - 22,yCenter - clockRadius - 15);

}

public void setCurrentTime() {

Calendar calendar = new GregorianCalendar();

this.hour = calendar.get(Calendar.HOUR_OF_DAY);

this.minute = calendar.get(Calendar.MINUTE);

this.second = calendar.get(Calendar.SECOND);

}

public static void main(String[] args) {

// TODO Auto-generated method stub

JFrame frame = new JFrame("DiaplayClock");

frame.setResizable(false);

frame.setTitle("DiaplayClock");

frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(300,350);

frame.setVisible(true);

while(true) {

StillClock clock = new StillClock();

frame.getContentPane().add(clock);

clock.setVisible(true);

frame.validate();

try {

Thread.sleep(1000);

}

catch (InterruptedException e) {

e.printStackTrace();

}

clock.setVisible(false);

frame.remove(clock);

clock = null;

frame.validate();

}

}

}

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