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* 
     
    //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：

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。