//我实现一个
时钟窗口程序给你了,好让你更容易理解,希望对你有帮助。\x0d\x0aimport java.awt.*\x0d\x0aimport java.awt.event.*\x0d\x0aimport java.util.*\x0d\x0a\x0d\x0a//世界时钟\x0d\x0apublic class TimerTest {\x0d\x0apublic static void main(String[] args) {\x0d\x0anew TimerTestFrame("世界时钟")\x0d\x0a}\x0d\x0a}\x0d\x0a\x0d\x0aclass TimerTestFrame extends Frame {\x0d\x0a/**\x0d\x0a* \x0d\x0a*/\x0d\x0aprivate static final long serialVersionUID = 1L\x0d\x0a\x0d\x0apublic TimerTestFrame(String s) {\x0d\x0asuper(s)\x0d\x0aaddWindowListener(new WindowAdapter() {\x0d\x0apublic void windowClosing(WindowEvent e) {\x0d\x0adispose()\x0d\x0aSystem.exit(0)\x0d\x0a}\x0d\x0a})\x0d\x0asetLayout(new GridLayout(2, 6))\x0d\x0a\x0d\x0aClockCanvas clk1 = new ClockCanvas("北京", "GMT+8")// 创建时钟\x0d\x0aClockCanvas clk2 = new ClockCanvas("巴黎", "GMT+2")\x0d\x0aClockCanvas clk3 = new ClockCanvas("华盛顿", "GMT-4")\x0d\x0aClockCanvas clk4 = new ClockCanvas("洛衫矶", "GMT-7")\x0d\x0aClockCanvas clk5 = new ClockCanvas("伦敦", "GMT+1")\x0d\x0aClockCanvas clk6 = new ClockCanvas("
芝加哥", "GMT-5")\x0d\x0aadd(clk1)\x0d\x0aadd(clk2)\x0d\x0aadd(clk3)\x0d\x0aadd(clk4)\x0d\x0aadd(clk5)\x0d\x0aadd(clk6)\x0d\x0asetSize(500, 350)// 设置框架宽高\x0d\x0asetVisible(true)\x0d\x0a}\x0d\x0a}\x0d\x0a\x0d\x0aclass ClockCanvas extends Canvas implements Runnable {\x0d\x0a/**\x0d\x0a* \x0d\x0a*/\x0d\x0aprivate static final long serialVersionUID = 1L\x0d\x0a\x0d\x0aprivate int seconds = 0\x0d\x0a\x0d\x0aprivate String city\x0d\x0a\x0d\x0aprivate GregorianCalendar calendar\x0d\x0a\x0d\x0aThread t\x0d\x0a\x0d\x0apublic ClockCanvas(String c, String tz) {\x0d\x0acity = c\x0d\x0a//也可以通过TimeZone.setTimeZone(String n)函数改变
时区,n为时区参数名。\x0d\x0acalendar = new GregorianCalendar(TimeZone.getTimeZone(tz))\x0d\x0at = new Thread(this)\x0d\x0at.start()\x0d\x0asetSize(125, 125)// 设置画布大小\x0d\x0asetBackground(Color.black)\x0d\x0a}\x0d\x0a\x0d\x0a// 重写父类的方法绘制时钟图形\x0d\x0apublic void paint(Graphics g) {\x0d\x0aGraphics2Dg2d = (Graphics2D) g\x0d\x0aBasicStroke bstroke = new BasicStroke(2.0f)\x0d\x0ag2d.setStroke(bstroke)\x0d\x0ag2d.setColor(Color.green)\x0d\x0ag2d.drawOval(0, 0, 100, 100)\x0d\x0abstroke = new BasicStroke(5.0f)\x0d\x0ag2d.setStroke(bstroke)\x0d\x0ag2d.drawLine(50, 0, 50, 5)\x0d\x0ag2d.drawLine(0, 50, 5, 50)\x0d\x0ag2d.drawLine(50, 95, 50, 98)\x0d\x0ag2d.drawLine(95, 50, 98, 50)\x0d\x0adouble hourAngle = 2 * Math.PI * (seconds - 3 * 60 * 60)\x0d\x0a/ (12 * 60 * 60)\x0d\x0adouble minuteAngle = 2 * Math.PI * (seconds - 15 * 60) / (60 * 60)\x0d\x0adouble secondAngle = 2 * Math.PI * (seconds - 15) / (60)\x0d\x0abstroke = new BasicStroke(5.0f)\x0d\x0ag2d.setStroke(bstroke)\x0d\x0ag2d.drawLine(50, 50, 50 + (int) (30 * Math.cos(hourAngle)),\x0d\x0a50 + (int) (30 * Math.sin(hourAngle)))\x0d\x0abstroke = new BasicStroke(3.0f)\x0d\x0ag2d.setStroke(bstroke)\x0d\x0ag2d.drawLine(50, 50, 50 + (int) (40 * Math.cos(minuteAngle)),\x0d\x0a50 + (int) (40 * Math.sin(minuteAngle)))\x0d\x0abstroke = new BasicStroke(1.0f)\x0d\x0ag2d.setStroke(bstroke)\x0d\x0ag2d.drawLine(50, 50, 50 + (int) (45 * Math.cos(secondAngle)),\x0d\x0a50 + (int) (45 * Math.sin(secondAngle)))\x0d\x0ag2d.setColor(Color.red)\x0d\x0ag2d.drawString(city, 35, 115)\x0d\x0a}\x0d\x0a\x0d\x0apublic void timeElapsed() {\x0d\x0a//new Date()()获得当前时间\x0d\x0aSystem.out.println(new Date()())\x0d\x0acalendar.setTime(new Date()())\x0d\x0aseconds = calendar.get(Calendar.HOUR) * 60 * 60\x0d\x0a+ calendar.get(Calendar.MINUTE) * 60\x0d\x0a+ calendar.get(Calendar.SECOND)\x0d\x0a}\x0d\x0a\x0d\x0apublic void run() {\x0d\x0atry {\x0d\x0awhile (true) {\x0d\x0aThread.sleep(300)\x0d\x0atimeElapsed()\x0d\x0arepaint()\x0d\x0a}\x0d\x0a} catch (InterruptedException e) {\x0d\x0a}\x0d\x0a}\x0d\x0a}//我实现一个时钟窗口程序给你了,好让你更容易理解,希望对你有帮助。
import java.awt.*
import java.awt.event.*
import java.util.*
//世界时钟
public class TimerTest {
public static void main(String[] args) {
new TimerTestFrame("世界时钟")
}
}
class TimerTestFrame extends Frame {
/**
*
*/
private static final long serialVersionUID = 1L
public TimerTestFrame(String s) {
super(s)
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
dispose()
System.exit(0)
}
})
setLayout(new GridLayout(2, 6))
ClockCanvas clk1 = new ClockCanvas("北京", "GMT+8")// 创建时钟
ClockCanvas clk2 = new ClockCanvas("巴黎", "GMT+2")
ClockCanvas clk3 = new ClockCanvas("华盛顿", "GMT-4")
ClockCanvas clk4 = new ClockCanvas("洛衫矶", "GMT-7")
ClockCanvas clk5 = new ClockCanvas("伦敦", "GMT+1")
ClockCanvas clk6 = new ClockCanvas("芝加哥", "GMT-5")
add(clk1)
add(clk2)
add(clk3)
add(clk4)
add(clk5)
add(clk6)
setSize(500, 350)// 设置框架宽高
setVisible(true)
}
}
class ClockCanvas extends Canvas implements Runnable {
/**
*
*/
private static final long serialVersionUID = 1L
private int seconds = 0
private String city
private GregorianCalendar calendar
Thread t
public ClockCanvas(String c, String tz) {
city = c
//也可以通过TimeZone.setTimeZone(String n)函数改变时区,n为时区参数名。
calendar = new GregorianCalendar(TimeZone.getTimeZone(tz))
t = new Thread(this)
t.start()
setSize(125, 125)// 设置画布大小
setBackground(Color.black)
}
// 重写父类的方法绘制时钟图形
public void paint(Graphics g) {
Graphics2Dg2d = (Graphics2D) g
BasicStroke bstroke = new BasicStroke(2.0f)
g2d.setStroke(bstroke)
g2d.setColor(Color.green)
g2d.drawOval(0, 0, 100, 100)
bstroke = new BasicStroke(5.0f)
g2d.setStroke(bstroke)
g2d.drawLine(50, 0, 50, 5)
g2d.drawLine(0, 50, 5, 50)
g2d.drawLine(50, 95, 50, 98)
g2d.drawLine(95, 50, 98, 50)
double hourAngle = 2 * Math.PI * (seconds - 3 * 60 * 60)
/ (12 * 60 * 60)
double minuteAngle = 2 * Math.PI * (seconds - 15 * 60) / (60 * 60)
double secondAngle = 2 * Math.PI * (seconds - 15) / (60)
bstroke = new BasicStroke(5.0f)
g2d.setStroke(bstroke)
g2d.drawLine(50, 50, 50 + (int) (30 * Math.cos(hourAngle)),
50 + (int) (30 * Math.sin(hourAngle)))
bstroke = new BasicStroke(3.0f)
g2d.setStroke(bstroke)
g2d.drawLine(50, 50, 50 + (int) (40 * Math.cos(minuteAngle)),
50 + (int) (40 * Math.sin(minuteAngle)))
bstroke = new BasicStroke(1.0f)
g2d.setStroke(bstroke)
g2d.drawLine(50, 50, 50 + (int) (45 * Math.cos(secondAngle)),
50 + (int) (45 * Math.sin(secondAngle)))
g2d.setColor(Color.red)
g2d.drawString(city, 35, 115)
}
public void timeElapsed() {
//new Date()()获得当前时间
System.out.println(new Date()())
calendar.setTime(new Date()())
seconds = calendar.get(Calendar.HOUR) * 60 * 60
+ calendar.get(Calendar.MINUTE) * 60
+ calendar.get(Calendar.SECOND)
}
public void run() {
try {
while (true) {
Thread.sleep(300)
timeElapsed()
repaint()
}
} catch (InterruptedException e) {
}
}
}