以下时代码,注意导包
package com.js.ai.modules.pointwall.testxfz;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.swing.JFrame;
public class ClockDemo extends JFrame implements Runnable{
Thread clock;
final int Xpoint=180;
final int Ypoint=180;
final int R=80;
int xHour=0,yHour=0,xSecond=0,ySecond=0,xMin=0,yMin=0;
public ClockDemo() {
super("数字时钟");
setFont(new Font("宋体", Font.BOLD, 20));
start();
setSize(360, 360);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void start()//开始进程
{
if(clock==null)//如果进程为空值
{
clock=new Thread(this); //实例化进程
clock.start();//开始进程
}
}
public void run()//运行进程
{
while(clock!=null){
repaint(); //调用paint方法重绘界面
try {
Thread.sleep(1000);//线程暂停一秒(1000毫秒)
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public void stop()//停止进程
{
clock=null;
}
public void paint(Graphics g)//重载组件的paint方法
{
Graphics2D g2=(Graphics2D) g;//得到Graphics2D对象
DateFormat dateFormat=DateFormat.getDateInstance(DateFormat.FULL);
Calendar now =new GregorianCalendar();//实例化日历对象
now.setTime(new Date());//dateFormat.format(now.getTime())
String timeInfo="";//输出信息
int hour=now.get(Calendar.HOUR_OF_DAY);//得到小时数
int minute=now.get(Calendar.MINUTE);//得到分数
int second=now.get(Calendar.SECOND);//得到秒数
if(hour<=9)
timeInfo+="0"+hour+":";//格式化输出
else
timeInfo+=hour+":";
if(minute<=9)
timeInfo+="0"+minute+":";
else
timeInfo+=minute+":";
if(second<=9)
timeInfo+="0"+second+":";
else
timeInfo+=second+":";
g.setColor(Color.yellow);//设置当前颜色为黄色
Dimension dim=getSize();//得到窗口尺寸
g.fillRect(0, 0, dim.width, dim.height);//填充背景
g.setColor(Color.red);//设置当前颜色
g.drawString(timeInfo, 130, 340);//显示时间字符串
g.setColor(Color.green);
g.drawString(dateFormat.format(now.getTime()),20,60);
g.setColor(Color.black);
g.setFont(new Font("SAN_SERIF", Font.BOLD, 15));
for(int i=0,num=12;i<360;i+=6){
double alfa=Math.toRadians(i);
int xPox=Xpoint+(int)(R*Math.sin(alfa));
int yPos=Ypoint-(int)(R*Math.cos(alfa));
if(i==0)
{
if (num%3==0)
g.setColor(Color.red); // 数字3,6,9,12为红色
else
g.setColor(Color.black); // 其余数字为黑色
g.drawString(""+num,xPox-5,yPos+3); // 写数字
num=(num+1);
}
else {
g.setColor(Color.black);
g.drawString(".",xPox,yPos);
}
}
g.setColor(Color.black);
g.fillOval(Xpoint-4,Ypoint-4,8,8);
//画秒针
xSecond=(int)(Xpoint+(R-10)*Math.sin(second*(2*Math.PI/60)));
ySecond=(int)(Ypoint-(R-10)*Math.cos(second*(2*Math.PI/60)));
g.setColor(Color.red);
g.drawLine(Xpoint,Ypoint,xSecond,ySecond);
//画分针
xMin=(int)(Xpoint+(R-20)*Math.sin((minute+second/60)*(2*Math.PI/60)));
yMin=(int)(Ypoint-(R-20)*Math.cos((minute+second/60)*(2*Math.PI/60)));
g.setColor(Color.red);
g.drawLine(Xpoint,Ypoint,xMin,yMin);
//画时针
xHour=(int)(Xpoint+(R-30)*Math.sin((hour+minute/60+second/60/60)*(2*Math.PI/12)));
yHour=(int)(Ypoint-(R-30)*Math.cos((hour+minute/60+second/60/60)*(2*Math.PI/12)));
g.setColor(Color.red);
g.drawLine(Xpoint,Ypoint,xHour,yHour);
}
public static void main(String[] args)
{
new ClockDemo();
}
}
```