㈠ java模拟时钟
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);
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)
{
}
}
}
}
㈡ 怎么用java编写时钟呀
import
java.util.*;
import
java.awt.*;
import
java.applet.*;
//impelements
Runnable
是线程程序的接口
public
class
Clock
extends
Applet
implements
Runnable
{
Thread
timer
=
null;
//
定义线程实体timer
int
xcenter
=
400,
ycenter
=
50;
int
Radius
=
ycenter
-
5;
public
void
init()
{
resize(400,
125);//
设置时钟程序的窗口大小
setBackground(Color.white);//
设置小应用程序的背景色
}
public
void
paint(Graphics
g)
{
int
xh,
yh,
xm,
ym,
xs,
ys,
s,
m,
h;
String
today;
Date
dat
=
new
Date();
//
定义时间类dat
s
=
dat.getSeconds();
//
获得时间秒
m
=
dat.getMinutes();
//
获得时间分
h
=
dat.getHours();
today
=
dat.toLocaleString();
//
获得字符串时间格式
g.clearRect(0,
0,
size().width,
size().height);
//
消除小应用程序
xcenter
=
xcenter
-
1;
//
向左移动一个像素点
if
(xcenter
<
-50)
xcenter
=
400;
//
如果xcenter小于-50，则回到初始位置
//
计算秒的坐标
xs
=
(int)
(Math.cos(s
*
3.14f
/
30
-
3.14f
/
2)
*
(Radius
-
5)
+
xcenter);
ys
=
(int)
(Math.sin(s
*
3.14f
/
30
-
3.14f
/
2)
*
(Radius
-
5)
+
ycenter);
//
计算分钟的坐标
xm
=
(int)
(Math.cos(m
*
3.14f
/
30
-
3.14f
/
2)
*
(Radius
-
10)
+
xcenter);
ym
=
(int)
(Math.sin(m
*
3.14f
/
30
-
3.14f
/
2)
*
(Radius
-
10)
+
ycenter);
//
计算小时的坐标
xh
=
(int)
(Math.cos((h
*
30
+
m
/
2)
*
3.14f
/
180
-
3.14f
/
2)
*
(Radius
-
20)
+
xcenter);
yh
=
(int)
(Math.sin((h
*
30
+
m
/
2)
*
3.14f
/
180
-
3.14f
/
2)
*
(Radius
-
20)
+
ycenter);
g.setColor(Color.darkGray);
//
设置颜色
g.drawString("9",
xcenter
-
(Radius
-
5),
ycenter
+
3);
//
显示时钟上的数字‘9’
g.drawString("3",
xcenter
+
(Radius
-
10),
ycenter
+
3);
//
显示时钟上的数字‘3’
g.drawString("12",
xcenter
-
5,
ycenter
-
(Radius
-
13));
//
显示时钟上的数字'12'
g.drawString("6",
xcenter
-
3,
ycenter
+
(Radius
-
10));
//
显示时钟上的数字'6'
g.drawString(today,
0,
125);
//
显示字符串时钟
g.drawLine(xcenter,
ycenter,
xs,
ys);
//
画秒针
g.setColor(Color.blue);
//
设置颜色
g.drawArc(xcenter
-
Radius,
ycenter
-
Radius,
2
*
Radius,
2
*
Radius,
0,
360);
//
画钟
g.drawLine(xcenter,
ycenter
-
1,
xm,
ym);
//
画分针
g.drawLine(xcenter
-
1,
ycenter,
xm,
ym);
//
画分针
g.drawLine(xcenter,
ycenter
-
1,
xh,
yh);
//
画时针
g.drawLine(xcenter
-
1,
ycenter,
xh,
yh);
//
画时针
}
public
void
start()
{
if
(timer
==
null)
{
timer
=
new
Thread(this);
//
生成Thread(多线程程序)的对象实体
timer.start();
//
启动生成的线程
}
}
public
void
stop()
{
timer.stop();
//
停止线程的工作
timer
=
null;
//
放掉Thread对象
}
public
void
run()
//
改方法用来定义线程体，一旦线程被启动执行，就开始执行这个方法
{
while
(timer
!=
null)
{
try
{
Thread.sleep(150);
//
使当前正在执行的线程进入睡眠时间由参数millis确定，
//
单位时间是毫秒，当这个时间过去，线程即可运行的
while
(timer
!=
null)
{
try
{
Thread.sleep(150);//
使用当前正在执行的线程进入睡眠时间由参数
//
millis确定,单位是毫秒，当这个时间过去，线程即为可运行的
}
catch
(InterruptedException
e)
{
}
repaint();
//
repaint所做的事其实是去调用方法uadate重画效应用程序
}
timer
=
null;
}
catch
(InterruptedException
e)
{
}
}
}
//
所做的工作是先将整个效应用程序区域清除，再去调用paint，完成重画的动作
public
void
update(Graphics
g)
{
paint(g);
}
}
㈢ 用Java编写一个时钟都需要用到什么
文本域和监听事件，下面是一个简单的时钟显示，您可以参考一下是不是您想要的类型
import java.awt.*;
import java.awt.event.*;
@SuppressWarnings("serial")
public class Css extends Frame implements Runnable{
TextField tf = new TextField();//定义文本框
public Css(){//自定义构造函数
setTitle("电子表");//实例化窗体对象，设定显示标题为电子表
setSize(200,200);//设定窗体大小
add(tf);//向容器中添加组件tf
addWindowListener(new WindowAdapter(){//创建匿名对象类，添加监听事件
public void windowClosing(WindowEvent event){
System.exit(0);//让监听事件正常退出
}
});
setVisible(true);//让组件显示出来
}
public static void main(String[] args){
Css a = new Css();//创建c类的实例对象a
Thread t = new Thread(a);//创建并实例化线程对象t
t.start();//启动线程
}
@SuppressWarnings("deprecation")
public void run(){//复写run()方法
while(true){//只要没有点击退出窗体就把当前系统时间显示在文本域中
try{
tf.setText(new java.util.Date().toLocaleString());
Thread.sleep(1000);//每秒刷新一下当前显示时间
}catch(Exception ex){
}
}
}
}
㈣ 用java编写一个时钟程序
public class Time{
static public void Xunhuan(){
String sendtime=new SimpleDateFormat("hh:mm:ss").format(new Date());//时间格式
System.out.println(sendtime);
Thread.sleep(5000);//每隔5秒打印一次(括号的数可改)
xunhuan();
}
}
㈤ Java时钟程序，更改时间之后，下一秒指针却是按照更改的数字变更了，第二秒后，指针又回到了当前系统时间
因为我不确定你的时钟程序是通过什么实现的，是定时器，还是线程或者是其他的什么手段，我猜想你的下一秒又恢复了，肯定是在原来的定时器中的上一秒的值没有变，导致下一秒又恢复原来的值，虽然更改时间了，但是上一秒的状态还是之前的值，计时间的时候依然按照原来的进行递增。
㈥ JAVA画时钟代码
importjava.awt.*;
importjava.awt.event.*;
importjavax.swing.*;
importsun.util.calendar.Gregorian;
importjava.util.Calendar;
importjava.util.GregorianCalendar;
{
intx,y,x0,y0,r,h,olds_x,olds_y,oldm_x,oldm_y,oldh_x,oldh_y,
ss,mm,hh,old_m,old_h,ang;
finaldoubleRAD=Math.PI/180;
publicClockPointer(){
super("Java时钟");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Imageimage=getToolkit().getImage("clock.gif");
setIconImage(image);
setSize(400,400);
setBackground(Color.white);
//setLocation(300,150);
this.setLocationRelativeTo(null);
setResizable(true);
intdelay=1000;
//创建一个监听事件
setVisible(true);
ActionListenerdrawClock=newActionListener(){
publicvoidactionPerformed(ActionEventevt){
repaint();
}
};
//创建一个时间计数器，每一秒触发一次
newTimer(delay,drawClock).start();
}
java.text.SimpleDateFormatfmTime=newjava.text.SimpleDateFormat("HH:mm:ss");
//绘制图形
publicvoidpaint(Graphicsg){
super.paint(g);
g.setFont(null);
Graphics2Dg2D=(Graphics2D)g;
Insetsinsets=getInsets();
intL=insets.left/2,T=insets.top/2;
h=getSize().height;
g.setColor(Color.white);
//画圆
g2D.setStroke(newBasicStroke(2.0f));
g.setColor(Color.gray);
g.drawOval(L+40,T+40,h-80,h-80);
r=h/2-40;
x0=40+r-5+L;
y0=40+r-5-T;
ang=60;
//绘制时钟上的12个字
for(inti=1;i<=12;i++){
x=(int)((r+10)*Math.cos(RAD*ang)+x0);
y=(int)((r+10)*Math.sin(RAD*ang)+y0);
g.setColor(Color.black);
g.drawString(""+i,x,h-y);
ang-=30;
}
//获得现在的时间
Calendarnow=newGregorianCalendar();
intnowh=now.get(Calendar.HOUR_OF_DAY);
intnowm=now.get(Calendar.MINUTE);
intnows=now.get(Calendar.SECOND);
Stringst=fmTime.format(now.getTime());
//在窗体上显示时间
g.setColor(Color.pink);
g.fillRect(L,T,50,28);
g.setColor(Color.blue);
g.drawString(st,L+2,T+26);
//计算时间与度数的关系
ss=90-nows*6;
mm=90-nowm*6;
hh=90-nowh*30-nowm/2;
x0=r+40+L;
y0=r+40+T;
g2D.setStroke(newBasicStroke(1.2f));
//擦除秒针
//if(olds_x>0){
//g.setColor(getBackground());
////g.setColor(Color.gray);
//g.drawLine(x0,y0,olds_x,h-olds_y);//(?)
//}
//绘制秒针
x=(int)(r*0.9*Math.cos(RAD*ss))+x0;
y=(int)(r*0.9*Math.sin(RAD*ss))+y0-2*T;
g.setColor(Color.yellow);
g.drawLine(x0,y0,x,h-y);
olds_x=x;
olds_y=y;
g2D.setStroke(newBasicStroke(2.2f));
//擦除分针
//if(old_m!=mm){
//g.setColor(getBackground());
//g.drawLine(x0,y0,oldm_x,h-oldm_y);
//}
//绘制分针
x=(int)(r*0.7*Math.cos(RAD*mm))+x0;
y=(int)(r*0.7*Math.sin(RAD*mm))+y0-2*T;
g.setColor(Color.green);
g.drawLine(x0,y0,x,h-y);
oldm_x=x;
oldm_y=y;
old_m=mm;
g2D.setStroke(newBasicStroke(3.2f));
//擦除时针
//if(old_h!=hh){
//g.setColor(getBackground());
//g.drawLine(x0,y0,oldh_x,h-oldh_y);
//}
//绘制时针
x=(int)(r*0.5*Math.cos(RAD*hh))+x0;
y=(int)(r*0.5*Math.sin(RAD*hh))+y0-2*T;
g.setColor(Color.red);
g.drawLine(x0,y0,x,h-y);
oldh_x=x;
oldh_y=y;
old_h=hh;
}
publicstaticvoidmain(String[]args){
newClockPointer();
}
}
//整理一下
㈦ JAVA 编写时钟程序
分太少了啊
给你一个只实现了时钟的面板。
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.Timer;
public class Clock extends JFrame implements ActionListener
{
private static final long serialVersionUID = 6790815213225162093L;
Timer timer;
int x,y,old_X,old_Y, r,x0,y0,w,h,ang;
int sdo,mdo,hdo,old_M,old_H;
TimeZone tz =TimeZone.getTimeZone("JST");
final double RAD=Math.PI/180.0;
public Clock()
{
super("时钟");
setSize(300,300);
setBackground(new Color(0,0,192));
setResizable(false);
Dimension scr=Toolkit.getDefaultToolkit().getScreenSize();
Dimension fra=this.getSize();
if(fra.width>scr.width)
{
fra.width=scr.width;
}
if(fra.height>scr.height)
{
fra.height=scr.height;
}
this.setLocation((scr.width-fra.width)/2,(scr.height-fra.height)/2);
setVisible(true);
int delay = 1000;
ActionListener taskPerformer = new ActionListener()
{
public void actionPerformed(ActionEvent evt)
{
repaint();
}
};
new Timer(delay, taskPerformer).start();
}
public void actionPerformed(ActionEvent e)
{
timer.restart();
}
public void paint( Graphics g )
{
Insets insets = getInsets();
int L0 = (insets.left)/2, T0 = (insets.top)/2;
int hh,mm,ss;
String st;
h=getSize().height;
g.setColor(Color.white);
g.drawOval(L0+30,T0+30,h-60,h-60);
g.drawOval(L0+32,T0+32,h-64,h-64);
r=h/2-30;
x0=30+r-5+L0;
y0=30+r-5-T0;
ang=60;
for (int i=1; i<=12; i++)
{
x=(int)((r+10)*Math.cos(RAD*ang)+x0);
y=(int)((r+10)*Math.sin(RAD*ang)+y0);
g.drawString(""+i,x,h-y);
ang-=30;
}
x0=30+r+L0; y0=30+r+T0;
Calendar now=Calendar.getInstance();
hh=now.get(Calendar.HOUR_OF_DAY);
mm=now.get(Calendar.MINUTE);
ss=now.get(Calendar.SECOND);
g.setColor(Color.pink);
g.fillRect(L0,T0,60,28);
g.setColor(Color.blue);
if (hh < 10) st="0"+hh; else st=""+hh;
if (mm < 10) st=st+":0"+mm; else st=st+":"+mm;
if (ss < 10) st=st+":0"+ss; else st=st+":"+ss;
g.drawString(st,L0,T0+25);
sdo=90-ss*6;
mdo=90-mm*6;
hdo=90-hh*30-mm/2;
if (old_X > 0)
{
g.setColor(getBackground());
g.drawLine(x0,y0,old_X,(h-old_Y));
} else
{
old_M=mdo;
old_H=hdo;
}
g.setColor(Color.yellow);
x=(int)((r-8)*Math.cos(RAD*sdo)+x0);
y=(int)((r-8)*Math.sin(RAD*sdo)+y0)-2*T0;
g.drawLine(x0,y0,x,(h-y));
old_X=x;
old_Y=y;
if (mdo != old_M)
{
line(g,old_M,(int)(r*0.7),getBackground());
old_M=mdo;
}
if (hdo != old_H)
{
line(g,old_H,(int)(r*0.5),getBackground());
old_H=hdo;
}
line(g,mdo,(int)(r*0.7),Color.green);
line(g,hdo,(int)(r*0.5),Color.red);
}
public void line(Graphics g, int t, int n, Color c)
{
int [] xp = new int[4];
int [] yp = new int[4];
xp[0]=x0;
yp[0]=y0;
xp[1]= (int)((n-10)*Math.cos(RAD*(t-4))+x0);
yp[1]=h-(int)((n-10)*Math.sin(RAD*(t-4))+y0);
xp[2]= (int)( n *Math.cos(RAD* t )+x0);
yp[2]=h-(int)( n *Math.sin(RAD* t )+y0);
xp[3]= (int)((n-10)*Math.cos(RAD*(t+4))+x0);
yp[3]=h-(int)((n-10)*Math.sin(RAD*(t+4))+y0);
g.setColor(c);
g.fillPolygon(xp,yp,4);
}
public static void main(String args[])
{
new Clock();
}
}
㈧ java时钟
GDI+时钟
import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import javax.swing.*;
public class Clock extends JComponent {
private static final Color INTEGRAL_COLOR = new Color(0, 128, 128);
private int radius;
private Calendar currentTime = Calendar.getInstance();
private double s = 0.03;
public Clock(int radius) {
this.radius = radius;
}
public void setCurrentTime(Date time)
{
this.currentTime.setTime(time);
}
public void setCurrentTime(long millis) {
this.currentTime.setTimeInMillis(millis);
}
public Dimension getPreferredSize() {
Insets insets = getInsets();
int r = (int) (radius == -1 ? 0 : radius * (1 + s)) + 1;
return new Dimension(r * 2 + insets.left + insets.right, r * 2
+ insets.top + insets.bottom);
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
Insets insets = getInsets();
int wid = getWidth() - insets.left - insets.right;
int hei = getHeight() - insets.top - insets.bottom;
int r = (int) ((Math.min(wid, hei)) / 2 / (1 + s));
g2d.translate(insets.left + r * (1 + s), insets.top + r * (1 + s));
g2d.scale(1, -1);
for (int i = 0; i < 60; i++) {
int angle = 90 - i * 6;
double pos[] = calcPos(r, angle);
paintMinuteDot(r, g2d, pos[0], pos[1], i % 5 == 0);
}
paintHourPointer(r, g2d);
paintMinutePointer(r, g2d);
paintSecondPointer(r, g2d);
paintCenterPoint(g2d);
g2d.scale(1, -1);
g2d.translate(-insets.left - r * (1 + s), -insets.top - r * (1 + s));
}
private void paintCenterPoint(Graphics2D g2d) {
g2d.setColor(Color.BLUE);
Rectangle2D rect = new Rectangle2D.Double(-2, -2, 4, 4);
g2d.fill(rect);
}
private void paintMinutePointer(int r, Graphics2D g2d) {
int minute = currentTime.get(Calendar.MINUTE);
int second = currentTime.get(Calendar.SECOND);
double angle = 90 - (minute + second / 60.0) * 6;
Shape pointerShape = createPointerShape(r * 0.8, r * 0.04, r * 0.08,
angle);
g2d.setColor(Color.LIGHT_GRAY);
g2d.fill(pointerShape);
g2d.setColor(Color.DARK_GRAY);
g2d.draw(pointerShape);
}
private void paintHourPointer(int r, Graphics2D g2d) {
int hour = currentTime.get(Calendar.HOUR);
int minute = currentTime.get(Calendar.MINUTE);
int second = currentTime.get(Calendar.SECOND);
double angle = 90 - (hour + minute / 60.0 + second / 3600.0) * 30;
Shape pointerShape = createPointerShape(r * 0.6, r * 0.06, r * 0.1,
angle);
g2d.setColor(Color.LIGHT_GRAY);
g2d.fill(pointerShape);
g2d.setColor(Color.DARK_GRAY);
g2d.draw(pointerShape);
}
private Shape createPointerShape(double r1, double r2, double r3,
double angle) {
GeneralPath gp = new GeneralPath();
double[] pos = calcPos(r1, angle);
double[] pos1 = calcPos(r2, angle + 90);
gp.append(new Line2D.Double(pos[0], pos[1], pos1[0], pos1[1]), true);
double[] pos2 = calcPos(r3, angle + 180);
gp.lineTo((float) pos2[0], (float) pos2[1]);
double[] pos3 = calcPos(r2, angle + 270);
gp.lineTo((float) pos3[0], (float) pos3[1]);
gp.closePath();
return gp;
}
private void paintSecondPointer(int r, Graphics2D g2d) {
g2d.setColor(Color.BLACK);
int second = currentTime.get(Calendar.SECOND);
int angle = 90 - second * 6;
double pos[] = calcPos(r * 0.9, angle);
double pos1[] = calcPos(r * 0.2, angle + 180);
Line2D line = new Line2D.Double(pos1[0], pos1[1], pos[0], pos[1]);
g2d.draw(line);
}
private void paintMinuteDot(int r, Graphics2D g2d, double x, double y,
boolean flag) {
g2d.setColor(flag ? Color.RED : Color.BLACK);
if (flag) {
// Rectangle2D rect = new Rectangle2D.Double(
Ellipse2D rect = new Ellipse2D.Double(x - r * s, y - r * s, r * s
* 2, r * s * 2);
g2d.fill(rect);
} else {
// Rectangle2D rect = new Rectangle2D.Double(
Ellipse2D rect = new Ellipse2D.Double(x - r * 0.02, y - r * 0.02,
r * 0.04, r * 0.04);
g2d.fill(rect);
}
}
private double[] calcPos(double r, double angle) {
double radian = Math.toRadians(angle);
double x = r * Math.cos(radian);
double y = r * Math.sin(radian);
return new double[] { x, y };
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
}
final Clock clock = new Clock(50);
clock.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
JFrame f = new JFrame("GDI+时钟");
// f.setBounds(380,200,500,600);
f.this.add(clock, BorderLayout.CENTER);
f.pack();
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
new Thread() {
public void run() {
while (true) {
try {
Thread.sleep(1000);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
clock.setCurrentTime(System.currentTimeMillis());
clock.repaint();
}
}
}.start();
}
}
㈨ 编写Java应用程序。首先，定义一个时钟类——Clock，
class clock { public: clock(); ~clock(); SetAlarm（int hour，int minute，int second); increamenthour(); increamentminute(); increamentsecond(); run(int hour，int minute，int second); private: int hr; int min; int sec; } void clock::SetAlarm（int hour，int minute，int second） { if(0<=hours&&hours<24) hr=hour; else hr=0; if(0<=hours&&hours<24) min=minute; else min=0; if(0<=hours&&hours<24) sec=second; else sec=0; } void clock::increamenthour() { hr++; if(hr>23) hr=0; } void clock::increamentminute() { min++; if(min>59) { min=0; increamenthour(); } } void clock::increamentsecond() { sec++; if(sec>59) { sec=0; increamtentminute(); } } void clock::run(int hour，int minute，int second) { increamenthour(); increamentminute(); increamentsecond(); if(hr==hour&&min==minute&&sec=second) cout<<"铃响"<<endl; }
㈩ JAVA时钟设计
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.Toolkit;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.image.BufferedImage;
import java.net.URL;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.swing.JFrame;
import javax.swing.JLabel;
/**
* 时钟程序
*/
public class Clock extends JFrame
{
// 今天的日期对象
private GregorianCalendar now = new GregorianCalendar();
// 时钟标签，上面画的是圆形时钟
private ClockLabel clockLabel = new ClockLabel();
// 星期标签，指示星期
private JLabel weekLabel = new JLabel();
// 日期标签，指示日期
private JLabel dateLabel = new JLabel();
// 品牌标签
private JLabel remarkLabel = new JLabel();
// 时间标签，指示时间
private JLabel timeLabel = new JLabel();
public Clock()
{
// 设置主界面属性
setTitle("时钟");
setSize(500, 480);
setLocation(100, 100);
init();
setResizable(false);
}
private void init()
{
// 初始化品牌标签
remarkLabel.setText("MyClock");
remarkLabel.setLocation(225, 80);
remarkLabel.setSize(100, 30);
remarkLabel.setFont(new Font("Bookman Old Style", Font.BOLD, 15));
remarkLabel.setForeground(Color.darkGray);
// 初始化星期标签
weekLabel.setSize(60, 20);
weekLabel.setLocation(315, 190);
weekLabel.setForeground(Color.darkGray);
weekLabel.setFont(new Font("Arial Narrow", Font.BOLD, 12));
// 为星期标签赋值
int week = now.get(Calendar.DAY_OF_WEEK);
switch (week)
{
case 1:
weekLabel.setText("SUNDAY");
break;
case 2:
weekLabel.setText("MONDAY");
break;
case 3:
weekLabel.setText("TUESDAY");
break;
case 4:
weekLabel.setText("WEDNESDAY");
break;
case 5:
weekLabel.setText("THURSDAY");
break;
case 6:
weekLabel.setText("FRIDAY");
break;
case 7:
weekLabel.setText("SATURDAY");
break;
}
// 初始化日期标签
dateLabel.setSize(20, 20);
dateLabel.setLocation(370, 190);
dateLabel.setForeground(Color.darkGray);
dateLabel.setFont(new Font("Fixedsys", Font.BOLD, 12));
// 设置日期标签的值
dateLabel.setText("" + now.get(Calendar.DATE));
// 初始化时间标签
timeLabel.setSize(500, 30);
timeLabel.setLocation(100, 400);
timeLabel.setForeground(new Color(0, 64, 128));
timeLabel.setFont(new Font("Fixedsys", Font.PLAIN, 15));
// 将各组件加入到主窗口中
Container con = getContentPane();
con.setBackground(Color.white);
con.setLayout(null);
con.add(weekLabel);
con.add(dateLabel);
con.add(remarkLabel);
con.add(timeLabel);
con.add(clockLabel);
}
public static void main(String[] args)
{
Clock clock = new Clock();
clock.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
clock.setVisible(true);
}
// 自定义时钟标签，画一个圆形的时钟
class ClockLabel extends JLabel implements Runnable
{
// 时钟标签的宽度和高度
private final int WIDTH = 500;
private final int HEIGHT = 440;
// 圆形时钟的X半径和Y半径
private final int CIRCLE_X_RADIUS = 150;
private final int CIRCLE_Y_RADIUS = 155;
// 圆形时钟的原点
private final int CIRCLE_X = 250;
private final int CIRCLE_Y = 200;
// 圆形时钟指针的长度
private final int HOUR_LENGTH = 50;
private final int MIN_LENGTH = 80;
private final int SEC_LENGTH = 100;
// 当前时针所处的角度
double arcHour = 0;
// 当前分针所处的角度
double arcMin = 0;
// 当前秒针所处的角度
double arcSec = 0;
// 颜色的透明度，
// 当颜色的alpha值为1或者255时，表示不透明，其他值时透明
int alpha = 50;
// 标识颜色透明度变化的方向，
// 为true时表示越来越透明，为false时表示月来越不透明
boolean flag = false;
// 背景图片的id，轮换显示背景图片时使用
int imageID = 0;
// 背景图片对象数组
Image img[] = new Image[5];
// 背景图片URL
URL url[] = new URL[] { ClockLabel.class.getResource("image/1.jpg"), ClockLabel.class.getResource("image/2.jpg"), ClockLabel.class.getResource("image/3.jpg"), ClockLabel.class.getResource("image/4.jpg"), ClockLabel.class.getResource("image/5.jpg"), ClockLabel.class.getResource("image/6.jpg") };
// 一个具有缓冲区的图像对象
BufferedImage bufferedImage = null;
int imageSize = 2 * Math.max(CIRCLE_X_RADIUS, CIRCLE_Y_RADIUS);
// 为bufferedImage创建的Graphics对象，用于在bufferedImage上画图
Graphics bufferedImageGraphics = null;
// 时钟线程，因为时钟每秒钟都要动一次，所以用线程
Thread clockThread = null;
// 构造方法
public ClockLabel()
{
// 设置时钟标签的大小
this.setSize(WIDTH, HEIGHT);
// 获取时针、分针、秒针当前的角度
arcHour = now.get(Calendar.HOUR) * 30; // 一格30度
arcMin = now.get(Calendar.MINUTE) * 6; // 一格6度
arcSec = now.get(Calendar.SECOND) * 6; // 一个6度
// 根据图片URL创建图片对象
Toolkit tk = this.getToolkit();
img[0] = tk.createImage(url[0]);
img[1] = tk.createImage(url[1]);
img[2] = tk.createImage(url[2]);
img[3] = tk.createImage(url[3]);
img[4] = tk.createImage(url[4]);
try
{
// 使用MediaTracker加载图片对象
// MediaTracker 类是一个跟踪多种媒体对象状态的实用工具类,
// 媒体对象可以包括音频剪辑和图像，但目前仅支持图像.
MediaTracker mt = new MediaTracker(this);
mt.addImage(img[0], 0);
mt.addImage(img[1], 0);
mt.addImage(img[2], 0);
mt.addImage(img[3], 0);
mt.addImage(img[4], 0);
// 加载媒体跟踪器中所有的图像。
mt.waitForAll();
}
catch (Exception e)
{
e.printStackTrace();
}
// 创建一个有缓冲的Image对象
bufferedImage = new BufferedImage(imageSize, imageSize, BufferedImage.TYPE_INT_ARGB);
// 为BufferedImage创建Graphics2D对象，
// 以后用该Graphics2D对象画的图都会画在BufferedImage中
bufferedImageGraphics = bufferedImage.createGraphics();
// 启动线程
clockThread = new Thread(this);
clockThread.start();
}
public void paint(Graphics g1)
{
// Graphics2D继承Graphics，比Graphics提供更丰富的方法
Graphics2D g = (Graphics2D) g1;
/** ***画圆形时钟的刻度，每6度便有一个刻度**** */
for (int i = 0; i < 360; i = i + 6)
{
// 设置画笔的颜色为蓝色
g.setColor(Color.blue);
// 设置画笔的宽度为2
g.setStroke(new BasicStroke(2));
if (i % 90 == 0)
{
// 对于0，3，6，9点位置，使用一个大的蓝色刻度
g.setStroke(new BasicStroke(5));// 画笔宽度为5
// 当起点和终点一样时，画的就是点
g.drawLine(CIRCLE_X + (int) (Math.cos(i * Math.PI / 180) * CIRCLE_X_RADIUS), CIRCLE_Y + (int) (Math.sin(i * Math.PI / 180) * CIRCLE_Y_RADIUS), CIRCLE_X + (int) (Math.cos(i * Math.PI / 180) * CIRCLE_X_RADIUS), CIRCLE_Y + (int) (Math.sin(i * Math.PI / 180) * CIRCLE_Y_RADIUS));
}
else if (i % 30 == 0)
{
// 如果角度处于小时的位置，而且还不在0，3，6，9点时，画红色的小刻度
g.setColor(Color.red);
g.drawLine(CIRCLE_X + (int) (Math.cos(i * Math.PI / 180) * CIRCLE_X_RADIUS), CIRCLE_Y + (int) (Math.sin(i * Math.PI / 180) * CIRCLE_Y_RADIUS), CIRCLE_X + (int) (Math.cos(i * Math.PI / 180) * CIRCLE_X_RADIUS), CIRCLE_Y + (int) (Math.sin(i * Math.PI / 180) * CIRCLE_Y_RADIUS));
}
else
{
// 其他位置就画蓝色的小刻度
g.drawLine(CIRCLE_X + (int) (Math.cos(i * Math.PI / 180) * CIRCLE_X_RADIUS), CIRCLE_Y + (int) (Math.sin(i * Math.PI / 180) * CIRCLE_Y_RADIUS), CIRCLE_X + (int) (Math.cos(i * Math.PI / 180) * CIRCLE_X_RADIUS), CIRCLE_Y + (int) (Math.sin(i * Math.PI / 180) * CIRCLE_Y_RADIUS));
}
}
/** ****** 画时钟的指针 ******** */
// 画时针
Line2D.Double lh = new Line2D.Double(CIRCLE_X, CIRCLE_Y, CIRCLE_X + Math.cos((arcHour - 90) * Math.PI / 180) * HOUR_LENGTH, CIRCLE_Y + Math.sin((arcHour - 90) * Math.PI / 180) * HOUR_LENGTH);
// 设置画笔宽度和颜色
g.setStroke(new BasicStroke(6));
g.setColor(new Color(0, 128, 0));
// 利用Graphics2D的draw方法画线
g.draw(lh);
// 画分针
Line2D.Double lm = new Line2D.Double(CIRCLE_X, CIRCLE_Y, CIRCLE_X + Math.cos((arcMin - 90) * Math.PI / 180) * MIN_LENGTH, CIRCLE_Y + Math.sin((arcMin - 90) * Math.PI / 180) * MIN_LENGTH);
g.setStroke(new BasicStroke(3));
g.setColor(new Color(0, 128, 192));
g.draw(lm);
// 画秒针
Line2D.Double ls = new Line2D.Double(CIRCLE_X, CIRCLE_Y, CIRCLE_X + Math.cos((arcSec - 90) * Math.PI / 180) * SEC_LENGTH, CIRCLE_Y + Math.sin((arcSec - 90) * Math.PI / 180) * SEC_LENGTH);
g.setStroke(new BasicStroke(1));
// 秒针的颜色随机，使动画效果明显。
g.setColor(new Color((int) (Math.random() * 255), (int) (Math.random() * 255), (int) (Math.random() * 255)));
g.draw(ls);
/** **** 画时钟背景，并将其透明处理 ******* */
// 所有使用bufferedImageGraphics画的图像，都画在bufferedImage上，
// drawImage方法的参数含义分别是：背景图片对象、目标位置第一个角的X、Y坐标、目标位置第二个角的X、Y坐标、
// 源位置第一个角的X、Y坐标、源位置第二个角的X、Y坐标、图像对象改变时的通知接受者
bufferedImageGraphics.drawImage(img[imageID], 0, 0, imageSize, imageSize, 0, 0, imageSize + 10, imageSize + 10, this);
// 将背景图片透明化
for (int j = 0; j < imageSize; j++)
{
for (int i = 0; i < imageSize; i++)
{
// 获得背景图像中(i, j)坐标的颜色值
int pix = bufferedImage.getRGB(i, j);
Color c = new Color(pix);
int r = c.getRed();
int gr = c.getGreen();
int b = c.getBlue();
// 通过Color对象的alpha，使颜色透明。
int newpix = new Color(r, gr, b, alpha).getRGB();
// 重新设置背景图像该象素点的颜色
bufferedImage.setRGB(i, j, newpix);
}
}
/** 以上画背景操作都是画在bufferedImage上的，这里要将bufferedImage画在ClockLabel **/
// 将当前用户剪贴区 Clip 与椭圆区域相交，并将 Clip 设置为所得的交集
g.clip(new Ellipse2D.Double(95, 45, imageSize, imageSize));
g.setColor(Color.white);
// 在用户剪贴区画bufferedImage
g.drawImage(bufferedImage, 95, 45, this);
}
public void run()
{
try
{
//
while (clockThread != null)
{
// 获得完整的日期格式
DateFormat df = DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.FULL);
// 格式化当前时间
String s = df.format(new Date());
timeLabel.setText(s);
// 每动一次对时钟指针的角度进行调整
arcSec += 6;
arcMin += 0.1;
arcHour += 0.1 / 60;
// 当角度满一圈时，归0
if (arcSec >= 360)
{
arcSec = 0;
}
if (arcMin >= 360)
{
arcMin = 0;
}
if (arcHour >= 360)
{
arcHour = 0;
}
// 实现背景透明度渐变
// 从浅入深，再由深入浅。
if (flag)
{
alpha += 10;
if (alpha == 50)
{
flag = !flag;
}
}
else
{
alpha -= 10;
if (alpha == 0)
{
flag = !flag;
// 当透明度变化一个轮回时，换一张背景图
imageID++;
if (imageID == 4)
{
imageID = 0;
}
}
}
// 重画时钟标签
repaint();
// 等待1秒钟
Thread.sleep(1000);
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
}