Java实现电子时钟

项目效果图：

源代码：

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.geom.Ellipse2D;

import java.awt.geom.Line2D;

import java.awt.image.BufferedImage;

import java.awt.EventQueue;

import java.util.Calendar;

import java.util.GregorianCalendar;

import javax.swing.JFrame;

import javax.swing.JPanel;

/* author: 蒋冰 */

public class MoveDraw extends JFrame{

private Draw draw = new Draw();

public static void main(String[] args){

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

MoveDraw frame = new MoveDraw();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

public MoveDraw(){

super();

setTitle("动画");

setBounds(400,300,400,300);

add(draw);

Thread thread = new Thread(draw);// 创建线程对象

thread.start();// 启动线程对象

}

class Draw extends JPanel implements Runnable{

Calendar calendar = new GregorianCalendar();

int hour = calendar.get(Calendar.HOUR);

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

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

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

int mouth = calendar.get(Calendar.MONTH);

int day = calendar.get(Calendar.DAY_OF_MONTH);

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

String date = year+"-"+mouth+"-"+day;

String weeks[] = new String[]{"星期天","星期一","星期二","星期三","星期四","星期五","星期六"};

double theta = second * (2 * Math.PI)/60 ;

double theta1 = (minute * (2 * Math.PI) + theta)/60;

double theta2 = (hour*(2 * Math.PI) + theta1)/12;

public void paint(Graphics g){

Graphics2D g2 = (Graphics2D) g;

g2.clearRect(0, 0, 400, 300);

g2.translate(draw.getWidth()/2, draw.getHeight()/2);

g2.setColor(Color.blue);

Font font = new Font("楷体",Font.ROMAN_BASELINE

,14);

g2.setFont(font);

g2.drawString(date, -25, 30);

g2.drawString(weeks[week-1]+"", -15, 50);

g2.setColor(Color.black);

for(int i=1; i<=12; i++){

double theta = i*2*Math.PI/12;

g2.rotate(theta);

int width = -7;

int height = -85;

g2.drawString(i+"", width, height);

g2.fillOval(-4, -104, 8, 8);

g2.rotate(2*Math.PI - theta);

}

for(int i=1; i<=60; i++){

double theta = i*2*Math.PI/60;

g2.rotate(theta);

g2.fillOval(-2, -102, 4, 4);

g2.rotate(2*Math.PI - theta);

}

Line2D.Float line = new Line2D.Float(0, 0, 0, -90);

Line2D.Float line1 = new Line2D.Float(0, 0, 0, -65);

Line2D.Float line2 = new Line2D.Float(0, 0, 0, -37);

g2.rotate(theta);

g2.draw(line);

g2.rotate(2 * Math.PI - theta);

g2.rotate(theta1);

g2.draw(line1);

g2.rotate(2 * Math.PI - theta1);

g2.rotate(theta2);

g2.draw(line2);

}

public void run(){

while(true){

theta += Math.PI/30;

theta1 = (minute * (2 * Math.PI) + theta)/60;

theta2 = (hour*(2 * Math.PI) + theta1)/12;

repaint();

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

// TODO自动生成的 catch 块

e.printStackTrace();

}

}

}

}

}