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

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。