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*
//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();
}
}
}
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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