while(true){
if(new Date().equals(yourDate)){
响铃程序
}
if(终止程序的条件){
break
}
continue
}
自己之前做过的一个：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>
* 方法说明：实现ActionListener类必须过载的方法
*/
public static void main(String[] args) {
Clock cp = new Clock()
cp.setVisible(true)
}
Clock() {
super("Java闹钟！")
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE)
setSize(550, 700)
setVisible(true)
Container contentPane = getContentPane()
jp2 = new JPanel()
jmb = new JMenuBar()
jm1 = new JMenu("背景颜色设置 ", true)
jmi1 = new JMenuItem("外圈颜色")
jmi1.addActionListener(this)
jmi1.setActionCommand("color1")
jm1.add(jmi1)
jmi2 = new JMenuItem("闹钟边线颜色")
jmi2.addActionListener(this)
jmi2.setActionCommand("color2")
jm1.add(jmi2)
jmi3=new JMenuItem("底盘颜色")
jmi3.addActionListener(this)
jmi3.setActionCommand("color3")
jm1.add(jmi3)
jmi4=new JMenuItem("系统时间背静颜色")
jmi4.addActionListener(this)
jmi4.setActionCommand("color4")
jm1.add(jmi4)
jmb.add(jm1)
jm2 = new JMenu("指针颜色设置 ", true)
jmi5 = new JMenuItem("秒针颜色")
jmi5.addActionListener(this)
jmi5.setActionCommand("color5")
jm2.add(jmi5)
jmi6 = new JMenuItem("分针颜色")
jmi6.addActionListener(this)
jmi6.setActionCommand("color6")
jm2.add(jmi6)
jmi7 = new JMenuItem("时针颜色")
jmi7.addActionListener(this)
jmi7.setActionCommand("color7")
jm2.add(jmi7)
jmb.add(jm2)
jm3 = new JMenu("闹铃声音设置 ", true)
jmi8 = new JMenuItem("响铃1")
jmi8.addActionListener(this)
jmi8.setActionCommand("ring1")
jm3.add(jmi8)
jmi9 = new JMenuItem("静音")
jmi9.addActionListener(this)
jmi9.setActionCommand("ring2")
jm3.add(jmi9)
jmb.add(jm3)
jm4 = new JMenu("帮助", true)
jmi10=new JMenuItem("使用说明")
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("闹铃时间")
jl1.setFont(new Font("楷体_GB2312", Font.BOLD, 18))
time = new JTextField("00:00", 5)
alarm = time.getText()
jb = new JButton("修改闹铃时间")
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)
// 窗体添加事件监听，监听秒表的触发
ActionListener taskPerformer = new ActionListener() {
public void actionPerformed(ActionEvent evt) {
repaint()
}
}
new Timer(delay, taskPerformer).start()
}
/**
* <br>
* 方法说明：绘制图形
*/
Color C1 = Color.lightGray// 外圈颜色
Color C2 = Color.black// 边线颜色
Color C3 = Color.magenta// 内盘颜色
Color C4 = Color.blue// 背景颜色
Color C5 = Color.yellow// 秒针颜色
Color C6 = Color.green// 分针颜色
Color C7 = Color.red//时针颜色
public class ClockPanel extends JPanel {
public void paint(Graphics g) {
h = getSize().height - 200
// 绘制圆形
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 = 1i <= 12i++) {
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("指针式时钟", 215, 200)
// 获取时间
now = Calendar.getInstance()
hh = now.get(Calendar.HOUR_OF_DAY)// 小时
mm = now.get(Calendar.MINUTE)// 分钟
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("华文楷体", Font.BOLD, 16))
g.drawString("系统时间:" + st, 10, 570)
}
// 计算时间和图形的关系
sdo = 90 - ss * 6
mdo = 90 - mm * 6
hdo = 90 - hh * 30 - mm / 2
// 擦除秒针
if (old_X >0) {
g.setColor(C3)
} else {
old_M = mdo
old_H = hdo
}
// 绘制秒针
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
// 擦除分针和时针
if (mdo != old_M) {
g.setColor(C3)
old_M = mdo
}
if (hdo != old_H) {
g.setColor(C3)
old_H = hdo
}
// 绘制分针
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))
// 绘制时针
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
}
// 闹铃时间的判断及实现
// 闹铃声音的实现
public void actionPerformed(ActionEvent e) {
// JMenuItem m = (JMenuItem) e.getSource()
if (e.getActionCommand() == "CC") {
int newHou, newMin
char c
String getTime = JOptionPane.showInputDialog(this, "请输入闹铃时间格式如：", "00:00")
repaint()
//如果撤消设置时间，就什么打印null
if(getTime==null)
System.out.println(getTime)
// dispose()
judge: if (getTime != null) {
//打印输入的设置的时间
System.out.println(getTime)
// 判断输入的是不是5位字符
if (getTime.length() != 5) {
JOptionPane.showMessageDialog(time, "格式错误\n请按格式输入5位数字", "Error",
JOptionPane.ERROR_MESSAGE)
repaint()
break judge
}
// 判断输入的是不是数字
for (int i = 0i <(getTime.length())i++) {
c = getTime.charAt(i)
if (i == 2 &&!Character.isDigit(c))
continue
// 判断当前字符,如果不是数字则跳出该事件
if (i != 2 &&!Character.isDigit(c)) {
JOptionPane.showMessageDialog(this, "格式错误\n请按格式输入5位数字",
"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, "格式错误\n小时应该是不小于0不大于23的正数",
"Error", JOptionPane.ERROR_MESSAGE)
repaint()
break judge
}
if (newMin >= 60 || newHou <0) {
JOptionPane.showMessageDialog(this, "格式错误\n分钟应该是小于60的正数", "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("静音")
toolkit=null
}
if (e.getActionCommand() == "color1") {
String color
Color c
System.out.println("color1")
color = JOptionPane.showInputDialog(this, "请输入喜欢的外圈颜色（0--255）", "128")
if (color == null) {
} else {
if (Integer.parseInt(color) <0
|| Integer.parseInt(color) >255)
JOptionPane.showInputDialog(this, "请输入喜欢的外圈颜色（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, "请输入喜欢的边线颜色（0--255）", "128")
if(color==null){}
else{if (Integer.parseInt(color) <0|| Integer.parseInt(color) >255)
JOptionPane.showInputDialog(this, "请输入喜欢的边线颜色（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, "请输入喜欢的内盘颜色（0--255）", "128")
if(color==null){}
else{if (Integer.parseInt(color) <0|| Integer.parseInt(color) >255)
JOptionPane.showInputDialog(this, "请输入喜欢的内盘颜色（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, "请输入喜欢的背景颜色（0--255）", "128")
if(color==null){}
else{if (Integer.parseInt(color) <0|| Integer.parseInt(color) >255)
JOptionPane.showInputDialog(this, "请输入喜欢的背景颜色（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, "请输入喜欢的秒针颜色（0--255）", "128")
if(color==null){}
else{if (Integer.parseInt(color) <0|| Integer.parseInt(color) >255)
JOptionPane.showInputDialog(this, "请输入喜欢的秒针颜色（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, "请输入喜欢的分针颜色（0--255）", "128")
if(color==null){}
else{if (Integer.parseInt(color) <0|| Integer.parseInt(color) >255)
JOptionPane.showInputDialog(this, "请输入喜欢的分针颜色（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, "请输入喜欢的时针颜色（0--255）", "128")
if(color==null){}
else{if (Integer.parseInt(color) <0|| Integer.parseInt(color) >255)
JOptionPane.showInputDialog(this, "请输入喜欢的时针颜色（0--255）", "128")
else {
c = new Color(Integer.parseInt(color))
C7 = c
}
}
}
if(e.getActionCommand() == "help"){
String help
help = JOptionPane.showInputDialog(this, "输入quit退出该闹钟的使用", "这是运行在Java中的指针式时钟")
if(help.equals("quit"))
dispose()
else {}
// timer.restart()
}
}
class SetTime {
String Hour
String Minute
public SetTime() { }
public SetTime(int hour, int minute) {
// 当时间参数小于10的时候在前面添加字符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()
}
}
}
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