java实现动态时钟并设置闹钟功能

本文实例为大家分享了java实现动态时钟设置闹钟功能，供大家参考，具体内容如下

显示如上图所示的动态时钟，并且可以设置闹钟，播放mp3。

首先用到的是时钟（Timer）和日历（Calendar）得到系统的当前时间。

代码如下：

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Timer;
import java.util.TimerTask; 

import javax.media.CannotRealizeException;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.NoPlayerException;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel; 

import javazoom.jl.player.Player; 

public class Clock extends JFrame { 

  MyPanel clockPanel;
  Ellipse2D.Double e;
  int x;
  int y;
  Line2D.Double hourLine;
  Line2D.Double minLine;
  Line2D.Double secondLine;
  GregorianCalendar calendar; 

  int hour;
  int minute;
  int second;
  String timestr = ""; 

  static int sethour;
  static int setminute;
  static int setsecond;   

  public static final int X = 60;
  public static final int Y = 60;
  public static final int X_BEGIN = 10;
  public static final int Y_BEGIN = 10;
  public static final int RADIAN = 50; 

  public Clock(){
    setSize(300, 200);
    setTitle("动态时钟");
    clockPanel = new MyPanel();
    add(clockPanel);
    Timer t = new Timer();
    Task task = new Task();
    t.schedule(task, 0, 1000);//每秒刷新一次
  } 

  File file = new File("当我想你的时候.mp3"); 

  public static void playMusic(File file) { //显示mp3文件的绝对路径
    try {
     javax.media.Player player = null;
      if (file.exists()) {
  MediaLocator locator = new MediaLocator("file:"
                + file.getAbsolutePath());
  System.out.println(file.getAbsolutePath());
      player = Manager.createRealizedPlayer(locator);
         player.prefetch();// Ԥ准备读取
      player.start();// 开始读取
        } else {
         System.out.println("没找到文件");
        }
       } catch (CannotRealizeException ex) {
          ex.printStackTrace();
       } catch (NoPlayerException ex) {
          ex.printStackTrace();
       } catch (IOException ex) {
        ex.printStackTrace();
        }
      }  

  public void play() {//播放mp3文件
    try {
      BufferedInputStream buffer = new BufferedInputStream(new FileInputStream("当我想你的时候.mp3"));
      Player player = new Player(buffer);
      player.play();
    } catch (Exception e) {
      System.out.println(e);
    }
  }  

  public static void main(String[] args) {
    Clock t = new Clock();
    t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    t.setVisible(true);
    //t.setLocationRelativeTo(null);//窗体显示在屏幕中央 

    //输入要设置的闹钟时间
    sethour = Integer.parseInt(JOptionPane.showInputDialog("请输入小时："));
    setminute = Integer.parseInt(JOptionPane.showInputDialog("请输入分钟："));
    setsecond = Integer.parseInt(JOptionPane.showInputDialog("请输入秒：")); 

  } 

class MyPanel extends JPanel {
  public MyPanel() {
    e = new Ellipse2D.Double(X_BEGIN, Y_BEGIN, 100, 100);
    hourLine = new Line2D.Double(X, Y, X, Y);
    minLine = new Line2D.Double(X, Y, X, Y);
    secondLine = new Line2D.Double(X, Y, X, Y);
  } 

  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D) g;
    g2.drawString("12", 55, 25);//整点时间
    g2.drawString("6", 55, 105);
    g2.drawString("9", 15, 65);
    g2.drawString("3", 100, 65);
    g2.drawString(timestr, 0, 130);
    g2.draw(e);
    g2.draw(hourLine);//时针
    g2.draw(minLine);//分针
    g2.draw(secondLine);//秒针
  }
} 

class Task extends TimerTask {
  public void run() {
    calendar = new GregorianCalendar();
    hour = calendar.get(Calendar.HOUR);
    minute = calendar.get(Calendar.MINUTE);
    second = calendar.get(Calendar.SECOND); 

    if(sethour == hour && setminute == minute && setsecond == second){
      playMusic(file);
      play();
      } 

    timestr = "当前时间：" + hour + " : " + minute + " : " + second; 

    hourLine.x2 = X + 40 * Math.cos(hour * (Math.PI / 6) - Math.PI / 2);
    hourLine.y2 = Y + 40 * Math.sin(hour * (Math.PI / 6) - Math.PI / 2);
    minLine.x2 = X + 45
        * Math.cos(minute * (Math.PI / 30) - Math.PI / 2);
    minLine.y2 = Y + 45
        * Math.sin(minute * (Math.PI / 30) - Math.PI / 2);
    secondLine.x2 = X + 50
        * Math.cos(second * (Math.PI / 30) - Math.PI / 2);
    secondLine.y2 = Y + 50
        * Math.sin(second * (Math.PI / 30) - Math.PI / 2);
    repaint();
   }
  }
}

其中播放mp3文件需要下载对应的jar包，否则不能播放。

下载地址：java实现动态时钟

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