代碼如下：
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import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Timer;
import java.util.TimerTask;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
/**
* 鬧鐘主界面
*/
public class AlarmClock extends JFrame implements ActionListener {
private static final int LOOP_COUNT = 5; // 重復(fù)播放的次數(shù)
private JLabel labelClock, labelAlarm, labelNextAlarm;
private JButton btnSet, btnClose;
private SetDialog setDialog;
private JPanel topPanel, alarmPanel;
private Timer timer;
private Clip clip;
private Calendar alarmCal;
private boolean timeReached = true;
private DateFormat df = new SimpleDateFormat(
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.Timer;
public class Clock extends JFrame implements ActionListener {
public final int HEIGTH = 200, L0 = 50, T0 = 50,N=8;
public final double RAD = Math.PI / 180.0;
int x, y, old_X, old_Y, r, x0, y0, w, h, ang;
int sdo, mdo, hdo, old_M, old_H, hh, mm, ss;
int delay = 1000;
Calendar now;
String st, alarm, Items1, Items2,str[];
JButton jb;
JComboBox jc1, jc2, jc3;
JLabel jl1, jl2, jl3, jl4;
JMenu jm1, jm2, jm3, jm4;
JMenuBar jmb;
JMenuItem jmi1, jmi2, jmi3, jmi4, jmi5, jmi6, jmi7, jmi8, jmi9,jmi10;
JTextField jtf1, jtf2, time;
JPanel jp1, jp2, jp3;
Timer timer;
TimeZone tz = TimeZone.getTimeZone("JST");
Toolkit toolkit=Toolkit.getDefaultToolkit();;
/**
* br
* 方法說明：實現(xiàn)ActionListener類必須過載的方法
*/
public static void main(String[] args) {
Clock cp = new Clock();
cp.setVisible(true);
}
Clock() {
super("Java鬧鐘！");
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setSize(550, 700);
setVisible(true);
Container contentPane = getContentPane();
jp2 = new JPanel();
jmb = new JMenuBar();
jm1 = new JMenu("背景顏色設(shè)置 ", true);
jmi1 = new JMenuItem("外圈顏色");
jmi1.addActionListener(this);
jmi1.setActionCommand("color1");
jm1.add(jmi1);
jmi2 = new JMenuItem("鬧鐘邊線顏色");
jmi2.addActionListener(this);
jmi2.setActionCommand("color2");
jm1.add(jmi2);
jmi3=new JMenuItem("底盤顏色");
jmi3.addActionListener(this);
jmi3.setActionCommand("color3");
jm1.add(jmi3);
jmi4=new JMenuItem("系統(tǒng)時間背靜顏色");
jmi4.addActionListener(this);
jmi4.setActionCommand("color4");
jm1.add(jmi4);
jmb.add(jm1);
jm2 = new JMenu("指針顏色設(shè)置 ", true);
jmi5 = new JMenuItem("秒針顏色");
jmi5.addActionListener(this);
jmi5.setActionCommand("color5");
jm2.add(jmi5);
jmi6 = new JMenuItem("分針顏色");
jmi6.addActionListener(this);
jmi6.setActionCommand("color6");
jm2.add(jmi6);
jmi7 = new JMenuItem("時針顏色");
jmi7.addActionListener(this);
jmi7.setActionCommand("color7");
jm2.add(jmi7);
jmb.add(jm2);
jm3 = new JMenu("鬧鈴聲音設(shè)置 ", true);
jmi8 = new JMenuItem("響鈴1");
jmi8.addActionListener(this);
jmi8.setActionCommand("ring1");
jm3.add(jmi8);
jmi9 = new JMenuItem("靜音");
jmi9.addActionListener(this);
jmi9.setActionCommand("ring2");
jm3.add(jmi9);
jmb.add(jm3);
jm4 = new JMenu("幫助 ", true);
jmi10=new JMenuItem("使用說明");
jmi10.addActionListener(this);
jmi10.setActionCommand("help");
jm4.add(jmi10);
jmb.add(jm4);
jp2.add(jmb);
contentPane.add(jp2, BorderLayout.NORTH);
jp3 = new JPanel();
jl1 = new JLabel("鬧鈴時間");
jl1.setFont(new Font("楷體_GB2312", Font.BOLD, 18));
time = new JTextField("00:00", 5);
alarm = time.getText();
jb = new JButton("修改鬧鈴時間");
jb.addActionListener(this);
jb.setActionCommand("CC");
jp3.add(jl1);
jp3.add(time);
jp3.add(jb);
contentPane.add(jp3, BorderLayout.SOUTH);
ClockPanel clock = new ClockPanel();
contentPane.add(clock, BorderLayout.CENTER);
// 窗體添加事件監(jiān)聽，監(jiān)聽秒表的觸發(fā)
ActionListener taskPerformer = new ActionListener() {
public void actionPerformed(ActionEvent evt) {
repaint();
}
};
new Timer(delay, taskPerformer).start();
}
/**
* br
* 方法說明：繪制圖形
*/
Color C1 = Color.lightGray;// 外圈顏色
Color C2 = Color.black;// 邊線顏色
Color C3 = Color.magenta;// 內(nèi)盤顏色
Color C4 = Color.blue;// 背景顏色
Color C5 = Color.yellow;// 秒針顏色
Color C6 = Color.green;// 分針顏色
Color C7 = Color.red;//時針顏色
public class ClockPanel extends JPanel {
public void paint(Graphics g) {
h = getSize().height - 200;
// 繪制圓形
g.setColor(C1);
g.fillOval(L0 + 30, T0 + 30, h - 60, h - 60);
g.setColor(C2);
g.drawOval(L0 + 31, T0 + 31, h - 62, h - 62);
g.setColor(C3);
g.fillOval(L0 + 50, T0 + 50, h - 100, h - 100);
g.setColor(C2);
g.drawOval(L0 + 51, T0 + 51, h - 102, h - 102);
r = h / 2 - 30;
x0 = 30 + r - 5 + L0;
y0 = 30 + r - 5 - T0;
ang = 60;
for (int i = 1; i = 12; i++) {
x = (int) ((r - 10) * Math.cos(RAD * ang) + x0);
y = (int) ((r - 10) * Math.sin(RAD * ang) + y0);
g.drawString("" + i, x, h - y);
ang -= 30;
}
x0 = 30 + r + L0;
y0 = 30 + r + T0;
g.drawString("指針式時鐘", 215, 200);
// 獲取時間
now = Calendar.getInstance();
hh = now.get(Calendar.HOUR_OF_DAY);// 小時
mm = now.get(Calendar.MINUTE);// 分鐘
ss = now.get(Calendar.SECOND);// 秒
g.setColor(C4);
g.fillRect(5, 550, 150, 30);// 填充的矩形
g.setColor(C6);
if (hh 10)
st = "0" + hh;
else
st = "" + hh;
if (mm 10)
st = st + ":0" + mm;
else
st = st + ":" + mm;
if(alarm.equals(st))
{
if(toolkit!=null)
toolkit.beep();
else {}
}
if (ss 10)
st = st + ":0" + ss;
else
st = st + ":" + ss;
{
g.setFont(new Font("華文楷體", Font.BOLD, 16));
g.drawString("系統(tǒng)時間:" + st, 10, 570);
}
// 計算時間和圖形的關(guān)系
sdo = 90 - ss * 6;
mdo = 90 - mm * 6;
hdo = 90 - hh * 30 - mm / 2;
// 擦除秒針
if (old_X 0) {
g.setColor(C3);
} else {
old_M = mdo;
old_H = hdo;
}
// 繪制秒針
g.setColor(C5);
x = (int) ((r - 26) * Math.cos(RAD * sdo) + x0);
y = (int) ((r - 26) * Math.sin(RAD * sdo) + y0) - 2 * T0;
g.drawLine(x0, y0, x, (h - y));
old_X = x;
old_Y = y;
// 擦除分針和時針
if (mdo != old_M) {
g.setColor(C3);
old_M = mdo;
}
if (hdo != old_H) {
g.setColor(C3);
old_H = hdo;
}
// 繪制分針
g.setColor(C6);
x = (int) ((r - 50) * Math.cos(RAD * mdo) + x0);
y = (int) ((r - 50) * Math.sin(RAD * mdo) + y0) - 2 * T0;
g.drawLine(x0, y0, x, (h - y));
// 繪制時針
g.setColor(C7);
x = (int) ((r - 90) * Math.cos(RAD * hdo) + x0);
y = (int) ((r - 90) * Math.sin(RAD * hdo) + y0) - 2 * T0;
g.drawLine(x0, y0, x, (h - y));
} // end paint
}
// 鬧鈴時間的判斷及實現(xiàn)
// 鬧鈴聲音的實現(xiàn)
public void actionPerformed(ActionEvent e) {
// JMenuItem m = (JMenuItem) e.getSource();
if (e.getActionCommand() == "CC") {
int newHou, newMin;
char c;
String getTime = JOptionPane.showInputDialog(this, "請輸入鬧鈴時間格式如：", "00:00");
repaint();
//如果撤消設(shè)置時間，就什么打印null
if(getTime==null)
System.out.println(getTime);
// dispose();
judge: if (getTime != null) {
//打印輸入的設(shè)置的時間
System.out.println(getTime);
// 判斷輸入的是不是5位字符
if (getTime.length() != 5) {
JOptionPane.showMessageDialog(time, "格式錯誤\n請按格式輸入5位數(shù)字", "Error",
JOptionPane.ERROR_MESSAGE);
repaint();
break judge;
}
// 判斷輸入的是不是數(shù)字
for (int i = 0; i (getTime.length()); i++) {
c = getTime.charAt(i);
if (i == 2 !Character.isDigit(c))
continue;
// 判斷當前字符,如果不是數(shù)字則跳出該事件
if (i != 2 !Character.isDigit(c)) {
JOptionPane.showMessageDialog(this, "格式錯誤\n請按格式輸入5位數(shù)字",
"Error",JOptionPane.ERROR_MESSAGE);
repaint();
break judge;
}
}
char[] hour = { getTime.charAt(0), getTime.charAt(1) };
char[] minute = { getTime.charAt(3), getTime.charAt(4) };
newHou = Integer.parseInt(String.valueOf(hour));
newMin = Integer.parseInt(String.valueOf(minute));
if (newHou = 24 || newHou 0) {
JOptionPane.showMessageDialog(this, "格式錯誤\n小時應(yīng)該是不小于0不大于23的正數(shù)",
"Error", JOptionPane.ERROR_MESSAGE);
repaint();
break judge;
}
if (newMin = 60 || newHou 0) {
JOptionPane.showMessageDialog(this, "格式錯誤\n分鐘應(yīng)該是小于60的正數(shù)", "Error",
JOptionPane.ERROR_MESSAGE);
repaint();
break judge;
}
new SetTime(newHou, newMin);
}
}
if (e.getActionCommand() == "ring1") {
toolkit=Toolkit.getDefaultToolkit();
}
if(e.getActionCommand() == "ring2"){
System.out.println("靜音");
toolkit=null;
}
if (e.getActionCommand() == "color1") {
String color;
Color c;
System.out.println("color1");
color = JOptionPane.showInputDialog(this, "請輸入喜歡的外圈顏色（0--255）", "128");
if (color == null) {
} else {
if (Integer.parseInt(color) 0
|| Integer.parseInt(color) 255)
JOptionPane.showInputDialog(this, "請輸入喜歡的外圈顏色（0--255）", "128");
else {
c = new Color(Integer.parseInt(color));
C1 = c;
}
}
}
if(e.getActionCommand() == "color2"){
String color;
Color c;
System.out.println("color2");
color = JOptionPane.showInputDialog(this, "請輸入喜歡的邊線顏色（0--255）", "128");
if(color==null){}
else{if (Integer.parseInt(color) 0|| Integer.parseInt(color) 255)
JOptionPane.showInputDialog(this, "請輸入喜歡的邊線顏色（0--255）", "128");
else {
c = new Color(Integer.parseInt(color));
C2 = c;
}
}
}
if(e.getActionCommand() == "color3"){
String color;
Color c;
System.out.println("color3");
color = JOptionPane.showInputDialog(this, "請輸入喜歡的內(nèi)盤顏色（0--255）", "128");
if(color==null){}
else{if (Integer.parseInt(color) 0|| Integer.parseInt(color) 255)
JOptionPane.showInputDialog(this, "請輸入喜歡的內(nèi)盤顏色（0--255）", "128");
else {
c = new Color(Integer.parseInt(color));
C3 = c;
}
}
}
if(e.getActionCommand() == "color4"){
String color;
Color c;
System.out.println("color4");
color = JOptionPane.showInputDialog(this, "請輸入喜歡的背景顏色（0--255）", "128");
if(color==null){}
else{if (Integer.parseInt(color) 0|| Integer.parseInt(color) 255)
JOptionPane.showInputDialog(this, "請輸入喜歡的背景顏色（0--255）", "128");
else {
c = new Color(Integer.parseInt(color));
C4 = c;
}
}
}
if(e.getActionCommand() == "color5"){
String color;
Color c;
System.out.println("color5");
color = JOptionPane.showInputDialog(this, "請輸入喜歡的秒針顏色（0--255）", "128");
if(color==null){}
else{if (Integer.parseInt(color) 0|| Integer.parseInt(color) 255)
JOptionPane.showInputDialog(this, "請輸入喜歡的秒針顏色（0--255）", "128");
else {
c = new Color(Integer.parseInt(color));
C5 = c;
}
}
}
if(e.getActionCommand() == "color6"){
String color;
Color c;
System.out.println("color6");
color = JOptionPane.showInputDialog(this, "請輸入喜歡的分針顏色（0--255）", "128");
if(color==null){}
else{if (Integer.parseInt(color) 0|| Integer.parseInt(color) 255)
JOptionPane.showInputDialog(this, "請輸入喜歡的分針顏色（0--255）", "128");
else {
c = new Color(Integer.parseInt(color));
C6 = c;
}
}
}
if(e.getActionCommand() == "color7"){
String color;
Color c;
System.out.println("color7");
color = JOptionPane.showInputDialog(this, "請輸入喜歡的時針顏色（0--255）", "128");
if(color==null){}
else{if (Integer.parseInt(color) 0|| Integer.parseInt(color) 255)
JOptionPane.showInputDialog(this, "請輸入喜歡的時針顏色（0--255）", "128");
else {
c = new Color(Integer.parseInt(color));
C7 = c;
}
}
}
if(e.getActionCommand() == "help"){
String help;
help = JOptionPane.showInputDialog(this, "輸入quit退出該鬧鐘的使用", "這是運行在Java中的指針式時鐘");
if(help.equals("quit"))
dispose();
else {}
// timer.restart();
}
}
class SetTime {
String Hour;
String Minute;
public SetTime() { }
public SetTime(int hour, int minute) {
// 當時間參數(shù)小于10的時候在前面添加字符0
if (hour 10) {
Hour = "0" + String.valueOf(hour);
} else {
Hour = "" + String.valueOf(hour);
}
if (minute 10) {
Minute = "0" + String.valueOf(minute);
} else {
Minute = "" + String.valueOf(minute);
}
alarm = Hour + ":" + Minute;
time.setText(alarm);
repaint();
}
}
}
import java.util.*;
import java.awt.*;
import java.applet.*;
import java.text.*;
import java.awt.event.*;
public class Alarm extends Applet implements Runnable
{
Thread timer=null; //創(chuàng)建線程timer
Image gif1; //clockp:鬧鐘的外殼，鬧鈴和報時物
boolean setflag=false,stopflag=false,cancelflag=false;
Panel setpanel;
//獲取聲音文件
AudioClip ring=getAudioClip(getCodeBase(), "1.mid");
Button setbutton=new Button("SET");
Button cancelbutton=new Button("CANCEL");
Button stopbutton=new Button("STOP");
//響應(yīng)按鈕事件
private ActionListener setli=new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
setflag=true;
}
};
private ActionListener cancelli=new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
setflag=true;
}
};
private ActionListener stopli=new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
ring.stop();
//清除的方法
//g.clearRect(83,280,20,30);
}
};
Label note1=new Label("Alarm clock:");
//GregorianCalendar提供的是一個日歷式的東東，上面又多了很多的參數(shù)，是方便操作了不少。而Date類的功能遠不及其，求個和日期有聯(lián)系的還要自己計算。
GregorianCalendar cal=new GregorianCalendar();
GregorianCalendar cal2=new GregorianCalendar();
SimpleDateFormat df=new SimpleDateFormat("yyyy MM dd HH:mm:ss");//設(shè)置時間格式
Date dummy=new Date(); //生成Data對象
String lastdate=df.format(dummy);
Font F=new Font("TimesRoman",Font.PLAIN,14);//設(shè)置字體格式
Date dat=null;
Date timeNow;
Color fgcol=Color.blue;
Color fgcol2=Color.darkGray;
Color backcolor=Color.blue;
Label hlabel2,mlabel2,slabel2;//顯示時間單位時所用的標簽（時、分、秒）
int i;
int s,m,h;
TextField sethour,setmin,setsec;//顯示當前時間文本框和定時文本框
//在Applet程序中，首先自動調(diào)用初始化完成必要的初始化工作，緊接著自動調(diào)用start，在進入執(zhí)行程序和返回到該頁面時被調(diào)用，而從該頁面轉(zhuǎn)到別的頁面時，stop被調(diào)用，關(guān)閉瀏覽器時，執(zhí)行destroy。
public void init()//初始化方法
{
int fieldx=50,fieldy1=120,fieldy2=220,fieldw=30,fieldh=20,space=50;//顯示時間和定時文本框的定位參數(shù)
setLayout(null); //將布局管理器初始化為null
setpanel=new Panel();
setpanel.setLayout(null);
setpanel.add(note1);
note1.setBounds(30,100,60,20);
note1.setBackground(backcolor);
note1.setForeground(Color.black);
//定時用的文本框（時、分、秒）
sethour=new TextField("00",5);
setmin=new TextField("00",5);
setsec=new TextField("00",5);
hlabel2=new Label();
mlabel2=new Label();
slabel2=new Label();
//定時的小時文本框的位置、大小
setpanel.add(sethour);
sethour.setBounds(fieldx,fieldy2,fieldw,fieldh);
sethour.setBackground(Color.white);
//在文本框后加入單位“時”
setpanel.add(hlabel2);
hlabel2.setText("h");
hlabel2.setBackground(backcolor);
hlabel2.setForeground(Color.black);
hlabel2.setBounds(fieldx+fieldw+3,fieldy2,14,20);
fieldx=fieldx+space;
//定時的分鐘文本框的位置、大小
setpanel.add(setmin);
setmin.setBounds(fieldx,fieldy2,fieldw,fieldh);
setmin.setBackground(Color.white);
//在文本框后加入單位“分”
setpanel.add(mlabel2);
mlabel2.setText("m");
mlabel2.setBackground(backcolor);
mlabel2.setForeground(Color.black);
mlabel2.setBounds(fieldx+fieldw+3,fieldy2,14,20);
fieldx=fieldx+space;
//定時的秒文本框的位置、大小
setpanel.add(setsec);
setsec.setBounds(fieldx,fieldy2,fieldw,fieldh);
setsec.setBackground(Color.white);
//在文本框后加入單位“秒”
setpanel.add(slabel2);
slabel2.setText("s");
slabel2.setBackground(backcolor);
slabel2.setForeground(Color.black);
slabel2.setBounds(fieldx+fieldw+3,fieldy2,14,20);
//設(shè)置鬧鐘控制按鈕（on,off)
setpanel.add(cancelbutton);
setpanel.add(setbutton);
setpanel.add(stopbutton);
cancelbutton.setBounds(90,180,40,20);
setbutton.setBounds(140,180,40,20);
stopbutton.setBounds(522,180,40,20);
setbutton.addActionListener(setli);
cancelbutton.addActionListener(cancelli);
stopbutton.addActionListener(stopli);
stopbutton.setVisible(false);
//將面板加入當前容器中，并設(shè)置面板的大小和背景色
add(setpanel);
setpanel.setBounds(300,1,250,420);
setpanel.setBackground(backcolor);
/*int xcenter,ycenter,s,m,h;
//鬧鐘中心點所在位置
xcenter=145;
ycenter=162;
s=(int)cal.get(Calendar.SECOND);
m=(int)cal.get(Calendar.MINUTE);
h=(int)cal.get(Calendar.HOUR_OF_DAY);
//初始化指針位置
lastxs=(int)(Math.cos(s*3.14f/30-3.14f/2)*30+xcenter);
lastys=(int)(Math.sin(s*3.14f/30-3.14f/2)*30+ycenter);
lastxm=(int)(Math.cos(m*3.14f/30-3.14f/2)*25+xcenter);
lastym=(int)(Math.sin(m*3.14f/30-3.14f/2)*25+ycenter);
lastxh=(int)(Math.cos((h*30+m/2)*3.14f/180-3.14f/2)*18+xcenter);
lastyh=(int)(Math.sin((h*30+m/2)*3.14f/180-3.14f/2)*18+ycenter);
lasts=s; */
MediaTracker mt=new MediaTracker(this);//為給定組件創(chuàng)建一個跟蹤媒體的MediaTracker對象，把圖片添加到被跟蹤的圖片組
//Java允?Sapplet??HTML所在的位置(decument base)下?d?Y料，也允?Sapplet?鈉涑淌醬a所在的位置(code base)下?d?Y料。藉由呼叫g(shù)etDocumentBase()?cgotCodeBase()可得到URL物件。?@些函?????湍閼業(yè)僥閬胂螺d的?n案的位置
//clockp=getImage(getDocumentBase(),"11.png");
gif1=getImage(getCodeBase(),"2.gif");
//i為id號
mt.addImage(gif1,i++);
try
{
mt.waitForAll();
}
catch(InterruptedException e)
{};//等待加載結(jié)束
resize(600,420);//設(shè)置窗口大小
}
//窗口顯示有改變的時候調(diào)用paint
public void paint(Graphics g)
{//重寫paint()方法
int xh,yh,xm,ym,xs,ys,strike_times;
int xcenter,ycenter;
String today;
xcenter=148;
ycenter=186;
dat=new Date();
//用當前時間初始化日歷時間
cal.setTime(dat);
//讀取當前時間
s=(int)cal.get(Calendar.SECOND);
m=(int)cal.get(Calendar.MINUTE);
h=(int)cal.get(Calendar.HOUR_OF_DAY);
//換一種時間表達形式
today=df.format(dat);
//指針位置
xs=(int)(Math.cos(s*3.14f/30-3.14f/2)*30+xcenter);
ys=(int)(Math.sin(s*3.14f/30-3.14f/2)*30+ycenter);
xm=(int)(Math.cos(m*3.14f/30-3.14f/2)*25+xcenter);
ym=(int)(Math.sin(m*3.14f/30-3.14f/2)*25+ycenter);
xh=(int)(Math.cos((h*30+m/2)*3.14f/180-3.14f/2)*12+xcenter);
yh=(int)(Math.sin((h*30+m/2)*3.14f/180-3.14f/2)*12+ycenter);
//設(shè)置字體和顏色
g.setFont(F);
//前景色
g.setColor(getBackground()); //取背景色的
g.drawImage(gif1,75,110,this);
//以數(shù)字方式顯示年、月、日和時間
g.drawString(today,55,415);
//畫指針
g.drawLine(xcenter,ycenter,xs,ys);
g.drawLine(xcenter,ycenter-1,xm,ym); //(x1,y1,x2,y2)
g.drawLine(xcenter-1,ycenter,xm,ym);
g.drawLine(xcenter,ycenter-1,xh,yh);
g.drawLine(xcenter-1,ycenter,xh,yh);
int timedelta;//記錄當前時間與鬧鈴定時的時差
Integer currh,currm,currs;//分別記錄當前的時、分、秒
Date dat2=new Date();
cal2.setTime(dat2);
//讀取當前時間
currh=(int)cal2.get(Calendar.SECOND);
currm=(int)cal2.get(Calendar.MINUTE);
currs=(int)cal2.get(Calendar.HOUR_OF_DAY);
//這樣做的話說我API已過時
//timeNow=new Date();
//currh=new Integer(timeNow.getHours());
//currm=new Integer(timeNow.getMinutes());
//currs=new Integer(timeNow.getSeconds());
if(setflag)
{ //判斷是否設(shè)置了鬧鐘
//判斷當前時間是否為鬧鐘所定的時間
if((currh.intValue()==Integer.valueOf(sethour.getText()).intValue())(currm.intValue()==Integer.valueOf(setmin.getText()).intValue())(currs.intValue()==Integer.valueOf(setsec.getText()).intValue()))
{
ring.play();
g.drawImage(gif1,83,280,this);
stopbutton.setVisible(true);
}
timedelta=currm.intValue()*60+currs.intValue()-Integer.valueOf(setmin.getText()).intValue()*60-Integer.valueOf(setsec.getText()).intValue();
if((timedelta=30))
{
//若當前時間與鬧鐘相差時間超過30秒，鬧鐘自動停
ring.stop();
//清除的方法
g.clearRect(83,280,20,30);
}
}
dat=null;
}
public void start()
{
if(timer==null)
{
timer=new Thread(this);//將timer實例化
timer.start();
}
}
public void stop()
{
timer=null;
}
//給創(chuàng)建線程后start之后自動執(zhí)行的函數(shù)
public void run()
{
//在run()方法中，調(diào)用repaint()方法，以重繪小程序區(qū)，進行時鐘顯示的更新。接著調(diào)用sleep方法讓當前線程（也就是我們創(chuàng)建的線程clockthread）睡眠1000毫秒，因為我們每秒鐘要更新一下顯示，所以讓它睡眠1秒
while(timer!=null)
{
try
{
timer.sleep(1000);
}
catch(InterruptedException e)
{}
//調(diào)用repaint時，會首先清除掉paint方法之前的畫的內(nèi)容，再調(diào)用paint方法
repaint();//刷新畫面
}
timer=null;
}
//當AWT接收到一個applet的重繪請求時，它就調(diào)用applet的 update()，默認地，update() 清除applet的背景，然后調(diào)用 paint()。重載 update()，將以前在paint()中的繪圖代碼包含在update()中，從而避免每次重繪時將整個區(qū)域清除
//有兩種方法可以明顯地減弱閃爍：重載 update()或使用雙緩沖。
//使用雙緩沖技術(shù):另一種減小幀之間閃爍的方法是使用雙緩沖，它在許多動畫Applet中被使用。其主要原理是創(chuàng)建一個后臺圖像，將需要繪制的一幀畫入圖像，然后調(diào)用DrawImage()將整個圖像一次畫到屏幕上去；好處是大部分繪制是離屏的，將離屏圖像一次繪至屏幕上比直接在屏幕上繪制要有效得多，大大提高做圖的性能。
// 雙緩沖可以使動畫平滑，但有一個缺點，要分配一張后臺圖像，如果圖像相當大，這將需要很大一塊內(nèi)存；當你使用雙緩沖技術(shù)時，應(yīng)重載 update()。
public void update(Graphics g)
{
Image offscreen_buf=null;
//采用雙緩沖技術(shù)的update()方法
if(offscreen_buf==null)
offscreen_buf=createImage(600,420);
Graphics offg=offscreen_buf.getGraphics();
offg.clipRect(1,1,599,419);
paint(offg);
Graphics ong=getGraphics();
ong.clipRect(1,1,599,419);
ong.drawImage(offscreen_buf,0,0,this);
}
/** Creates a new instance of AlarmClock */
}
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