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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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