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：
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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服务器之家。
原文链接：http://blog.csdn.net/qq_32353771/article/details/51726312
