java实现动态时钟并设置闹钟功能

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(); 
  } 
 } 
}