import java.text.SimpleDateFormat
import java.util.Date
import javax.swing.JFrame
import javax.swing.JLabel
public class Clock {
public static void main(String[] args) throws InterruptedException {
JFrame f = new JFrame()
Timer timer = new Timer()
Thread th=new Thread(timer)
th.start()
JLabel time = new JLabel()
f.add(time)
f.setVisible(true)
f.pack()
while(true){
time.setText(timer.getCurrentTime())
}
}
}
class Timer implements Runnable {
private String currentTime
public String getCurrentTime() {
Date d = new Date()
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss")
currentTime = sdf.format(d)
return currentTime
}
public void run() {
try {
Thread.sleep(1000)
getCurrentTime()
} catch (InterruptedException e) {
e.printStackTrace()
}
}
}
完成给分
paintComponent这个方法里会留下原有的
重写下边的方法，就不会了
public void paint(Graphics g) {
super.paint(g)
*****画图部分*************
}
import java.awt.*import java.applet.Applet
import java.util.Calendar
import java.text.SimpleDateFormat
import java.util.Date
public class ClockApplet extends Applet implements Runnable //Applet支持线程
{
private Thread athread //线程
private SimpleDateFormat sdateformat//日期格式
public void init()
{
this.setBackground(Color.white)//背景颜色设为白色
this.athread = null
}
public void paint(Graphics g)
{
this.sdateformat = new SimpleDateFormat("hh时mm分ss秒")
g.drawString(this.sdateformat.format(new Date()),25,131)
Calendar rightnow = Calendar.getInstance()
int second = rightnow.get(Calendar.SECOND)
int minute = rightnow.get(Calendar.MINUTE)
int hour = rightnow.get(Calendar.HOUR)
//半径
int R_H = 20,R_M = 4,R_S = 4
//时针的坐标
//x ====(9-3)[0-6] (3-9)[6-0]
//y ====(12-6)[0-6] (6-12)[6-0]
int H_x
int H_y
//x
if(hour == 0)
{
hour = 12
}
if( hour >= 3 &&hour <= 9 )
{
H_x = R_H*Math.abs(hour - 9)
}
else
{
if(hour >9)
{
H_x = R_H*Math.abs(hour - 9)
}
else
{
H_x = R_H*Math.abs(hour+3)
}
}
//y
if( hour >= 6 &&hour <= 12 )
{
H_y = R_H*Math.abs(hour - 12)
}
else
{
H_y = R_H*hour
}
//分针的坐标
int M_x
int M_y
if(minute == 0)
{
minute = 60
}
if( minute >= 15 &&minute <= 45 )
{
M_x = R_M*Math.abs(minute - 45)
}
else
{
if(minute >45)
{
M_x = R_M*Math.abs(minute - 45)
}
else
{
M_x = R_M*Math.abs(minute+15)
}
}
//y
if( minute >= 30 &&minute <60 )
{
M_y = R_M*Math.abs(minute - 60)
}
else
{
M_y = R_M*minute
}
//秒针的坐标
int S_x
int S_y
if(second == 0)
{
second = 60
}
if( second >= 15 &&second <= 45 )
{
S_x = R_S*Math.abs(second - 45)
}
else
{
if(second >45)
{
S_x = R_S*Math.abs(second - 45)
}
else
{
S_x = R_S*Math.abs(second+15)
}
}
//y
if( second >= 30 &&second <= 60 )
{
S_y = R_S*Math.abs(second - 60)
}
else
{
S_y = R_S*second
}
// g.drawString(String.valueOf(second),25,50)
//g.drawString(String.valueOf(minute),25,60)
// g.drawString(String.valueOf(hour),25,70)
// g.drawString(String.valueOf(H_x),25,80)
// g.drawString(String.valueOf(H_y),25,90)
g.drawOval(0,0,120,120)//距离相差10像素
g.setColor(Color.darkGray)
g.drawString("9",5,65)
g.drawString("3",110,65)
g.drawString("12",55,15)
g.drawString("6",55,115)
g.drawString("1",80,20)
g.drawString("2",100,40)
g.drawString("4",100,90)
g.drawString("5",80,110)
g.drawString("7",30,110)
g.drawString("8",10,90)
g.drawString("10",10,40)
g.drawString("11",30,20)
g.setColor(Color.red)
g.drawLine(60,60,H_x,H_y)//前一个点表示起点，另一个表示终点
g.setColor(Color.blue)
g.drawLine(60,60,M_x,M_y)
g.setColor(Color.yellow)
g.drawLine(60,60,S_x,S_y)
}
public void start()
{
if(athread == null)
{
athread = new Thread(this)
athread.start()
}
}
public void stop()
{
if(athread != null)
{
athread.interrupt()
athread = null
}
}
public void run()
{
while(athread != null)
{
repaint()
try
{
athread.sleep(1000)
}
catch(InterruptedException e)
{
}
}
}
}
