java写一个时钟的代码 java简单时钟代码及详细解释

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用JAVA写数字时钟

import javax.swing.*;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import java.awt.*;

import java.util.Calendar;

import java.util.GregorianCalendar;

class Clock extends JFrame implements ActionListener{

int x,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;

final double RAD=Math.PI/180;

public Clock(){

super("Clock by kikiwawa");

setDefaultCloseOperation(3);

setSize(200,200);

setBackground(Color.BLACK);

setLocation(300,150);

setResizable(false);

setVisible(true);

int delay = 1000;

ActionListener drawClock = new ActionListener(){

public void actionPerformed(ActionEvent evt){

repaint();

}

};

new Timer(delay,drawClock).start();

}

public void actionPerformed(ActionEvent e){

}

public void paint(Graphics g){

Graphics2D g2D = (Graphics2D)g;

Insets insets = getInsets();

int L = insets.left/2,T = insets.top/2;

h = getSize().height;

g.setColor(Color.white);

g2D.setStroke(new BasicStroke(4.0f));

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;

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;

}

Calendar now= new GregorianCalendar();

int nowh= now.get(Calendar.HOUR_OF_DAY);

int nowm= now.get(Calendar.MINUTE);

int nows= now.get(Calendar.SECOND);

String st;

if(nowh10) st="0"+nowh;else st=""+nowh;

if(nowm10) st+=":0"+nowm;else st+=":"+nowm;

if(nows10) st+=":0"+nows;else st+=":"+nows;

g.setColor(Color.pink);

g.fillRect(L,T,50,28);

g.setColor(Color.blue);

g.drawString(st,L+2,T+26);

ss=90-nows*6;

mm=90-nowm*6;

hh=90-nowh*30-nowm/2;

x0=r+40+L;

y0=r+40+T;

if(olds_x0){

g.setColor(getBackground());

g.drawLine(x0,y0,olds_x,h-olds_y);

}

else{

old_m = mm;

old_h = hh;

}

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(new BasicStroke(2.2f));

if(old_m!=mm){

g.setColor(getBackground());

g.drawLine(x0,y0,oldm_x,h-oldm_y);

}

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(new BasicStroke(3.4f));

if(old_h!=hh){

g.setColor(getBackground());

g.drawLine(x0,y0,oldh_x,h-oldh_y);

}

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;

}

public static void main(String[] args){

Clock c = new Clock();

} }

相关问答

Q1: 用 java 写一个clock的类，100毫秒的时钟求代码。。越简单越好。。最好有注释

这里有一个时钟java写一个时钟的代码的类java写一个时钟的代码，java写一个时钟的代码你看一下吧java写一个时钟的代码，不明白你java写一个时钟的代码的 100毫秒的时钟是什么意思。

import java.awt.BasicStroke;

import java.awt.BorderLayout;

import java.awt.Canvas;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.geom.Line2D;

import java.util.Date;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.Timer;

public class ClockAs extends Canvas implements ActionListener {

static JButton jb = new JButton("开始");

static JButton jb1 = new JButton("暂停");

Date date;

Timer secondTime;

int hour, munite, second;

Line2D secondLine, muniteLine, hourLine;

int a, b, c;

double pointSX[] = new double[60],// 用来表示秒针端点坐标的数组

pointSY[] = new double[60], pointMX[] = new double[60], // 用来表示分针端点坐标的数组

pointMY[] = new double[60], pointHX[] = new double[60], // 用来表示时针端点坐标的数组

pointHY[] = new double[60];

ClockAs() {

secondTime = new Timer(1000, this);

pointSX[0] = 0; // 12点秒针位置

pointSY[0] = -100;

pointMX[0] = 0; // 12点分针位置

pointMY[0] = -90;

pointHX[0] = 0; // 12点时针位置

pointHY[0] = -70;

double angle = 6 * Math.PI / 180; // 刻度为6度

for (int i = 0; i 59; i++) // 计算出各个数组中的坐标

{

pointSX[i + 1] = pointSX[i] * Math.cos(angle) - Math.sin(angle)

* pointSY[i];

pointSY[i + 1] = pointSY[i] * Math.cos(angle) + pointSX[i]

* Math.sin(angle);

pointMX[i + 1] = pointMX[i] * Math.cos(angle) - Math.sin(angle)

* pointMY[i];

pointMY[i + 1] = pointMY[i] * Math.cos(angle) + pointMX[i]

* Math.sin(angle);

pointHX[i + 1] = pointHX[i] * Math.cos(angle) - Math.sin(angle)

* pointHY[i];

pointHY[i + 1] = pointHY[i] * Math.cos(angle) + pointHX[i]

* Math.sin(angle);

}

for (int i = 0; i 60; i++) {

pointSX[i] = pointSX[i] + 120; // 坐标平移

pointSY[i] = pointSY[i] + 120;

pointMX[i] = pointMX[i] + 120; // 坐标平移

pointMY[i] = pointMY[i] + 120;

pointHX[i] = pointHX[i] + 120; // 坐标平移

pointHY[i] = pointHY[i] + 120;

}

secondLine = new Line2D.Double(0, 0, 0, 0);

muniteLine = new Line2D.Double(0, 0, 0, 0);

hourLine = new Line2D.Double(0, 0, 0, 0);

secondTime.start(); // 秒针开始计时

}

public void paint(Graphics g) {

for (int i = 0; i 60; i++) // 绘制表盘上的小刻度和大刻度

{

int m = (int) pointSX[i];

int n = (int) pointSY[i];

if (i % 5 == 0) {

g.setColor(Color.red);

g.fillOval(m - 4, n - 4, 8, 8);

} else {

g.setColor(Color.cyan);

g.fillOval(m - 2, n - 2, 4, 4);

}

g.fillOval(115, 115, 10, 10); // 钟表中心的实心圆

Graphics2D g_2d = (Graphics2D) g;

g_2d.setColor(Color.red);

g_2d.draw(secondLine);

BasicStroke bs = new BasicStroke(3f, BasicStroke.CAP_ROUND,

BasicStroke.JOIN_MITER);

g_2d.setStroke(bs);

g_2d.setColor(Color.blue);

g_2d.draw(muniteLine);

bs = new BasicStroke(6f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER);

g_2d.setStroke(bs);

g_2d.setColor(Color.green);

g_2d.draw(hourLine);

}

public void actionPerformed(ActionEvent e) {

if (e.getSource() == secondTime) {

date = new Date();

String s = date.toString();

hour = Integer.parseInt(s.substring(11, 13));

munite = Integer.parseInt(s.substring(14, 16));

second = Integer.parseInt(s.substring(17, 19)); // 获取时间中的秒

int h = hour % 12;

a = second; // 秒针端点的坐标

b = munite; // 分针端点的坐标

c = h * 5 + munite / 12; // 时针端点的坐标

secondLine.setLine(120, 120, (int) pointSX[a], (int) pointSY[a]);

muniteLine.setLine(120, 120, (int) pointMX[b], (int) pointMY[b]);

hourLine.setLine(120, 120, (int) pointHX[c], (int) pointHY[c]);

repaint();

}

if (e.getSource() == jb) {

secondTime.start();

}

if (e.getSource() == jb1) {

secondTime.stop();

}

public static void main(String args[]) {

JFrame win = new JFrame("时钟");

JPanel jp = new JPanel();

jp.add(jb);

jp.add(jb1);

ClockAs clock = new ClockAs();

jb.addActionListener(clock);

jb1.addActionListener(clock);

win.add(clock, BorderLayout.CENTER);

win.add(jp, "South");

win.setVisible(true);

win.setSize(246, 300);

win.setDefaultCloseOperation(3);

win.validate();

}

Q2: JAVA画时钟代码

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import sun.util.calendar.Gregorian;

import java.util.Calendar;

import java.util.GregorianCalendar;

public class ClockPointer extends JFrame{

int x, 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;

final double RAD = Math.PI/180;

public ClockPointer(){

super("Java时钟");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Image image = getToolkit().getImage("clock.gif");

setIconImage(image);

setSize(400,400);

setBackground(Color.white);

//setLocation(300,150);

this.setLocationRelativeTo(null);

setResizable(true);

int delay = 1000;

//创建一个监听事件

setVisible(true);

ActionListener drawClock = new ActionListener(){

public void actionPerformed(ActionEvent evt){

repaint();

}

};

//创建一个时间计数器，每一秒触发一次

new Timer(delay, drawClock).start();

}

java.text.SimpleDateFormat fmTime = new java.text.SimpleDateFormat("HH:mm:ss");

//绘制图形

public void paint(Graphics g){

super.paint(g);

g.setFont(null);

Graphics2D g2D = (Graphics2D)g;

Insets insets = getInsets();

int L = insets.left/2, T = insets.top/2;

h = getSize().height;

g.setColor(Color.white);

//画圆

g2D.setStroke(new BasicStroke(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(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.setColor(Color.black);

g.drawString(""+i, x, h-y);

ang -=30;

}

//获得现在的时间

Calendar now = new GregorianCalendar();

int nowh = now.get(Calendar.HOUR_OF_DAY);

int nowm = now.get(Calendar.MINUTE);

int nows = now.get(Calendar.SECOND);

String st=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(new BasicStroke(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(new BasicStroke(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(new BasicStroke(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;

}

public static void main(String[] args){

new ClockPointer();

}

//整理一下

Q3: 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

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

{

int

xh,

yh,

xm,

ym,

xs,

ys,

String

today;

Date

dat

new

Date();

定义时间类dat

dat.getSeconds();

获得时间秒

dat.getMinutes();

获得时间分

dat.getHours();

today

dat.toLocaleString();

获得字符串时间格式

g.clearRect(0,

size().width,

size().height);

消除小应用程序

xcenter

向左移动一个像素点

(xcenter

-50)

xcenter

400;

如果xcenter小于-50，则回到初始位置

计算秒的坐标

(int)

(Math.cos(s

3.14f

(Radius

xcenter);

(int)

(Math.sin(s

3.14f

(Radius

ycenter);

计算分钟的坐标

(int)

(Math.cos(m

3.14f

(Radius

10)

xcenter);

(int)

(Math.sin(m

3.14f

(Radius

10)

ycenter);

计算小时的坐标

(int)

(Math.cos((h

3.14f

180

3.14f

(Radius

20)

xcenter);

(int)

(Math.sin((h

3.14f

180

3.14f

(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

ycenter

(Radius

13));

显示时钟上的数字'12'

g.drawString("6",

xcenter

ycenter

(Radius

10));

显示时钟上的数字'6'

g.drawString(today,

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,

360);

画钟

g.drawLine(xcenter,

ycenter

xm,

ym);

画分针

g.drawLine(xcenter

ycenter,

xm,

ym);

画分针

g.drawLine(xcenter,

ycenter

xh,

yh);

画时针

g.drawLine(xcenter

ycenter,

xh,

yh);

画时针

}

public

void

start()

{

(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

{

}

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

{

}

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

{

paint(g);

}

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用JAVA写数字时钟

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用JAVA写数字时钟

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