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javaSwing制作时钟

2017-02-15 13:52 399 查看

这是一个线程启动的时钟框。

public class ThreadClock extends JFrame implements Runnable{

private volatile BufferedImage boardDrawing;//volatile是程度较轻的 synchronized

private volatile BufferedImage boardDisplaying;

public ThreadClock()

{

setTitle("当前时间");//标题名称

setSize(300, 300);//展示框的大小

setLocation(0,100);//初始展现的位置

setDefaultCloseOperation(DISPOSE_ON_CLOSE);

setVisible(true);

boardDrawing = new BufferedImage(this.getWidth(), this.getHeight(), BufferedImage.TYPE_INT_RGB);

boardDisplaying = new BufferedImage(this.getWidth(), this.getHeight(), BufferedImage.TYPE_INT_RGB);

}

public void paint(Graphics g) {

g.drawImage(boardDisplaying, 0, 0, null);

}

@Override

public void run() {

while(this.isShowing())

{

Graphics g = boardDrawing.getGraphics();

g.setColor(Color.BLACK);

g.clearRect(0, 0, boardDrawing.getWidth(), boardDrawing.getHeight());//清除图形

g.fillRect(0, 0, boardDrawing.getWidth(), boardDrawing.getHeight());//填充背景色为白色



//画图

//画出clock的表盘及数字

g.setColor(Color.WHITE);

g.drawOval(100, 100, 100, 100);

g.drawString("12", 145, 115);

g.drawString("6", 145, 195);

g.drawString("9", 105, 155);

g.drawString("3", 190, 155);



//get Instance Time得到当前时间

Calendar c=Calendar.getInstance();

int week=c.get(Calendar.DAY_OF_WEEK);

int month=c.get(Calendar.MONTH);

int day=c.get(Calendar.DATE);

int hour=c.get(Calendar.HOUR_OF_DAY);

int minute=c.get(Calendar.MINUTE);

int second=c.get(Calendar.SECOND);

int year=c.get(Calendar.YEAR);



//画出时针分针秒针

DrawHands(g, second/60.0, 40);

DrawHands(g, minute/60.0, 32);

DrawHands(g, (hour)/12.0, 25);



String[] weekName={"星期六","星期日","星期一","星期二","星期三","星期四","星期五"};

String[] monthName={"1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月"};



//画出显示时间的字符串

g.drawString(weekName[week],180, 215);

g.drawString(year+"年"+monthName[month]+day+"日", 85, 215);

g.drawString("TimeWalking", 200, 280);



// 切换前景与背景工作区

BufferedImage tmp = boardDisplaying;

boardDisplaying = boardDrawing;

boardDrawing = tmp;

this.repaint();



try {

Thread.sleep(500);

} catch (Exception e) {

System.out.println(e);

}

}

}

//用g画出某根针（时分秒只是长度不同），percent表示从十二点到某指针现在的位置占整个圆周的百分比，length表示长度

private void DrawHands(Graphics g,Double percent,int length)

{

double degree=360*percent;

int x=(int)(150+Math.cos(2*Math.PI*(90-degree)/360)*length);

int y=(int)(150-Math.sin(2*Math.PI*(90-degree)/360)*length);

g.drawLine(150, 150, x, y);

}

public static void main(String[] args) {

TODOAuto-generated method stub

ThreadClock clock=new ThreadClock();

new Thread(clock).start();

}

}

这个是我从网站上找来后调整好的，可以直接复制粘贴用的。大家可以拿去使用- -。

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