我正在尝试构建具有不同时区的模拟时钟，但我遇到了错误。 我想知道我是否可以像现在这样使用我的iListener。我希望通过更改当前时间的添加或减少来获得不同的时区。可能吗？ 这是我的代码：
import javax.swing.*;
import java.awt.*;
import java.util.Date;
public class SimpleAnalogClock extends JPanel
{
int centerPointX;
int centerPointY;
int xs;
int ys;
Font quartzFont;
Date currentDate;
private JCheckBox Turkey, England;
public SimpleAnalogClock()
{
setBackground(new Color(0,0,0));
JFrame frame=new JFrame("Simple Analog Clock");
Turkey = new JCheckBox("Turkey");
England = new JCheckBox ("England");
add(Turkey);
add(England);
iListener listener = new iListener();
Turkey.addItemListener(listener);
England.addI
frame.add(this);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(450,450);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
//LOOP THAT WILL UPDATE CLOCK
while(true)
{
repaint();
try
{
Thread.sleep(900);
}
catch(Exception exception)
{
exception.printStackTrace();
}
}
}
public iListener implements ItemListener
{
public void itemStateChanged (ItemEvent e)
{
if(Turkey.isSelected())
{
/**Information that i mean here is
*coordinate for second pointer's corner.
*You can try change value 5 in xsm,ysm,xsa and ysa.
*After that, try compile and execute this program.
**/
int s=currentDate.getSeconds();
int s_minus_five=s-5;
int s_add_five=s+5;
xs = (int) (Math.cos(s * Math.PI / 30 - Math.PI / 2) * 170 + centerPointX);
ys = (int) (Math.sin(s * Math.PI / 30 - Math.PI / 2) * 170 + centerPointY);
int xsm=(int) (Math.cos(s_minus_five * Math.PI / 30 - Math.PI / 2) * 5 + centerPointX);
int ysm=(int) (Math.sin(s_minus_five * Math.PI / 30 - Math.PI / 2) * 5 + centerPointY);
int xsa=(int) (Math.cos(s_add_five * Math.PI / 30 - Math.PI / 2) * 5 + centerPointX);
int ysa=(int) (Math.sin(s_add_five * Math.PI / 30 - Math.PI / 2) * 5 + centerPointY);
//************GET CURRENT SECOND AND ALL INFORMATION TO DRAW SECOND POINTER**************
//************GET CURRENT MINUTE AND ALL INFORMATION TO DRAW MINUTE POINTER**************
/**Information that i mean here is
*coordinate for minute pointer's corner.
*You can try change value 10 in xmm,ymm,xma and yma.
*After that, try compile and execute this program.
**/
int m=currentDate.getMinutes();
int m_minus_ten=m-10;
int m_add_ten=m+10;
int xm = (int) (Math.cos(m * Math.PI / 30 - Math.PI / 2) * 170 + centerPointX);
int ym = (int) (Math.sin(m * Math.PI / 30 - Math.PI / 2) * 170 + centerPointY);
int xmm=(int) (Math.cos(m_minus_ten * Math.PI / 30 - Math.PI / 2) * 10 + centerPointX);
int ymm=(int) (Math.sin(m_minus_ten * Math.PI / 30 - Math.PI / 2) * 10 + centerPointY);
int xma=(int) (Math.cos(m_add_ten * Math.PI / 30 - Math.PI / 2) * 10 + centerPointX);
int yma=(int) (Math.sin(m_add_ten * Math.PI / 30 - Math.PI / 2) * 10 + centerPointY);
//************GET CURRENT MINUTE AND ALL INFORMATION TO DRAW MINUTE POINTER**************
//************GET CURRENT HOUR AND ALL INFORMATION TO DRAW HOUR POINTER**************
/**Information that i mean here is
*coordinate for hour pointer's corner.
*You can try change value 10 in xhm,yhm,xha and yha.
*After that, try compile and execute this program.
**/
int h=currentDate.getHours();
int h_minus_ten=h-10;
int h_add_ten=h+10;
int xh = (int) (Math.cos(h * Math.PI / 6 - Math.PI / 2) * 100 + centerPointX);
int yh = (int) (Math.sin(h * Math.PI / 6 - Math.PI / 2) * 100 + centerPointY);
int xhm=(int) (Math.cos(h_minus_ten * Math.PI / 6 - Math.PI / 2) * 10 + centerPointX);
int yhm=(int) (Math.sin(h_minus_ten * Math.PI / 6 - Math.PI / 2) * 10 + centerPointY);
int xha=(int) (Math.cos(h_add_ten * Math.PI / 6 - Math.PI / 2) * 10 + centerPointX);
int yha=(int) (Math.sin(h_add_ten * Math.PI / 6 - Math.PI / 2) * 10 + centerPointY);
}
if(England.isSelected())
{
/**Information that i mean here is
*coordinate for second pointer's corner.
*You can try change value 5 in xsm,ysm,xsa and ysa.
*After that, try compile and execute this program.
**/
int s=currentDate.getSeconds();
int s_minus_five=s-5;
int s_add_five=s+5;
xs = (int) (Math.cos(s * Math.PI / 30 - Math.PI / 2) * 170 + centerPointX);
ys = (int) (Math.sin(s * Math.PI / 30 - Math.PI / 2) * 170 + centerPointY);
int xsm=(int) (Math.cos(s_minus_five * Math.PI / 30 - Math.PI / 2) * 5 + centerPointX);
int ysm=(int) (Math.sin(s_minus_five * Math.PI / 30 - Math.PI / 2) * 5 + centerPointY);
int xsa=(int) (Math.cos(s_add_five * Math.PI / 30 - Math.PI / 2) * 5 + centerPointX);
int ysa=(int) (Math.sin(s_add_five * Math.PI / 30 - Math.PI / 2) * 5 + centerPointY);
//************GET CURRENT SECOND AND ALL INFORMATION TO DRAW SECOND POINTER**************
//************GET CURRENT MINUTE AND ALL INFORMATION TO DRAW MINUTE POINTER**************
/**Information that i mean here is
*coordinate for minute pointer's corner.
*You can try change value 10 in xmm,ymm,xma and yma.
*After that, try compile and execute this program.
**/
int m=currentDate.getMinutes();
int m_minus_ten=m-10;
int m_add_ten=m+10;
int xm = (int) (Math.cos(m * Math.PI / 30 - Math.PI / 2) * 170 + centerPointX);
int ym = (int) (Math.sin(m * Math.PI / 30 - Math.PI / 2) * 170 + centerPointY);
int xmm=(int) (Math.cos(m_minus_ten * Math.PI / 30 - Math.PI / 2) * 10 + centerPointX);
int ymm=(int) (Math.sin(m_minus_ten * Math.PI / 30 - Math.PI / 2) * 10 + centerPointY);
int xma=(int) (Math.cos(m_add_ten * Math.PI / 30 - Math.PI / 2) * 10 + centerPointX);
int yma=(int) (Math.sin(m_add_ten * Math.PI / 30 - Math.PI / 2) * 10 + centerPointY);
//************GET CURRENT MINUTE AND ALL INFORMATION TO DRAW MINUTE POINTER**************
//************GET CURRENT HOUR AND ALL INFORMATION TO DRAW HOUR POINTER**************
/**Information that i mean here is
*coordinate for hour pointer's corner.
*You can try change value 10 in xhm,yhm,xha and yha.
*After that, try compile and execute this program.
**/
int h=currentDate.getHours() - 2;
int h_minus_ten=h-10;
int h_add_ten=h+10;
int xh = (int) (Math.cos(h * Math.PI / 6 - Math.PI / 2) * 100 + centerPointX);
int yh = (int) (Math.sin(h * Math.PI / 6 - Math.PI / 2) * 100 + centerPointY);
int xhm=(int) (Math.cos(h_minus_ten * Math.PI / 6 - Math.PI / 2) * 10 + centerPointX);
int yhm=(int) (Math.sin(h_minus_ten * Math.PI / 6 - Math.PI / 2) * 10 + centerPointY);
int xha=(int) (Math.cos(h_add_ten * Math.PI / 6 - Math.PI / 2) * 10 + centerPointX);
int yha=(int) (Math.sin(h_add_ten * Math.PI / 6 - Math.PI / 2) * 10 + centerPointY);
}
}
}
public void paint(Graphics g)
{
centerPointX=getSize().width/2;
centerPointY=getSize().height/2;
currentDate=new Date();
//************GET CURRENT SECOND AND ALL INFORMATION TO DRAW SECOND POINTER**************
//************GET CURRENT HOUR AND ALL INFORMATION TO DRAW HOUR POINTER**************
//OVAL THAT MAKE CLOCK CIRCLE
int ovalWidth=400;
int ovalHeight=400;
//OVAL THAT MAKE CLOCK CIRCLE
Graphics2D g2d=(Graphics2D)g;
super.paint(g2d);
//PEN COLOR TO DRAW : White
Color penColor=new Color(255,255,255);
//PEN COLOR TO DRAW : Black
Color penColor2=new Color(0,0,0);
//Clock circle background color
g2d.setColor(penColor);
g2d.fillOval(((getSize().width)/2)-(ovalWidth/2),((getSize().height)/2)-(ovalHeight/2),ovalWidth,ovalHeight);
//Draw "Quartz" text
g2d.setColor(penColor2);
quartzFont=new Font("Verdana",Font.BOLD,20);
g2d.setFont(quartzFont);
g2d.drawString("Quartz",centerPointX-30,centerPointY-100);
//Draw number 12,3,6 and 9
quartzFont=new Font("Verdana",Font.BOLD,50);
g2d.setFont(quartzFont);
g2d.drawString("12",centerPointX-30,centerPointY-120);
g2d.drawString("6",centerPointX-18,centerPointY+170);
g2d.drawString("3",centerPointX+140,centerPointY+13);
g2d.drawString("9",centerPointX-170,centerPointY+13);
//*************DRAW SECOND POINTER*********
int[]coordinateXs={centerPointX,xsm,xs,xsa};
int[]coordinateYs={centerPointY,ysm,ys,ysa};
g2d.fillPolygon(coordinateXs,coordinateYs,4);
//*************DRAW SECOND POINTER*********
//*************DRAW MINUTE POINTER*********
int[]coordinateXm={centerPointX,xmm,xm,xma};
int[]coordinateYm={centerPointY,ymm,ym,yma};
g2d.fillPolygon(coordinateXm,coordinateYm,4);
//*************DRAW MINUTE POINTER*********
//*************DRAW HOUR POINTER*********
int[]coordinateXh={centerPointX,xhm,xh,xha};
int[]coordinateYh={centerPointY,yhm,yh,yha};
g2d.fillPolygon(coordinateXh,coordinateYh,4);
//*************DRAW HOUR POINTER*********
//*************DRAW LINE TICK*******************
//Line tick that i mean here is, short line to indicate second.
//I hope you understand what i mean.
for(int i=1; i<=360; i++)
{
int tickX;
int tickY;
int tickXb;
int tickYb;
tickX=(int) (Math.cos(i * Math.PI / 30 - Math.PI / 2)* 180 + centerPointX);
tickY=(int) (Math.sin(i * Math.PI / 30 - Math.PI / 2)* 180 + centerPointY);
tickXb=(int) (Math.cos(i * Math.PI / 30 - Math.PI / 2) * 300 + centerPointX);
tickYb=(int) (Math.sin(i * Math.PI / 30 - Math.PI / 2) * 300 + centerPointY);
g2d.drawLine(tickXb,tickYb,tickX,tickY);
}
//*************DRAW LINE TICK*******************
}
public static void main(String[]args)
{
SimpleAnalogClock sac=new SimpleAnalogClock();
}
}
答案 0 :(得分：0)
http://itechnobuzzz.blogspot.in/2013/09/make-analog-clock-using-java.html 从上面链接你有java的模拟时钟的答案..
答案 1 :(得分：0)
HI这是我的模拟时钟代码，带有下拉菜单以选择国家/地区。
这是一个java代码。 如果在运行代码或编译代码时遇到任何问题，请与我联系。
package clock;
import java.awt.event.*;
import javax.swing.*;
import java.text.*;
import java.util.*;
import java.awt.*;
public class Clock extends JPanel implements Runnable,ActionListener {
public static JMenu jMenu1=new JMenu();
public static JMenu jMenu2=new JMenu();
public static JMenu jMenu3=new JMenu();
public static JMenuBar jMenuBar1=new JMenuBar();
public static JMenuItem jMenuItem1=new JMenuItem();
public static JMenuItem jMenuItem2=new JMenuItem();
public static JMenuItem jMenuItem3=new JMenuItem();
public static JMenuItem jMenuItem4=new JMenuItem();
public static JMenuItem jMenuItem5=new JMenuItem();
public static JMenuItem jMenuItem6=new JMenuItem();
public static JMenuItem jMenuItem7=new JMenuItem();
public static JMenuItem jMenuItem8=new JMenuItem();
public static JMenuItem jMenuItem9=new JMenuItem();
public static String [] array = {"Europe/Copenhagen","US/Michigan","Asia/Istanbul","Iran","Asia/Singapore","Australia/LHI"};
public static JComboBox dropdown = new JComboBox(array);
public static JLabel label = new JLabel("Label");
public static int seconds,minutes,hours;
public static String timezone = "Europe/Copenhagen";
Thread thread = null;
SimpleDateFormat formatter = new SimpleDateFormat("s", Locale.getDefault());
Date currentDate;
int xcenter = 175, ycenter = 175, lastxs = 0, lastys = 0, lastxm = 0, lastym = 0, lastxh = 0,lastyh = 0;
private void drawStructure(Graphics g)
{
Color customColor = new Color(240,240,240);
g.setColor(customColor);
g.drawRect(10, 0, 600, 600);
g.fillRect(0, 0, 600, 600);
g.setFont(new Font("TimesRoman", Font.BOLD, 20));
g.setColor(Color.WHITE);
g.fillOval(xcenter - 170, ycenter - 170, 300, 300);
g.setColor(Color.BLACK);
g.drawString("12", xcenter - 30, ycenter - 150);
g.drawString(".",xcenter + 50,ycenter - 140);
g.drawString(".",xcenter + 100, ycenter - 90);
g.drawString("3", xcenter + 115, ycenter - 20);
g.drawString(".",xcenter + 100, ycenter + 50);
g.drawString(".", xcenter + 50, ycenter + 100);
g.drawString("6", xcenter - 30, ycenter + 125);
g.drawString(".",xcenter - 90, ycenter + 100);
g.drawString(".",xcenter - 140,ycenter +50);
g.drawString("9", xcenter - 165, ycenter -20);
g.drawString(".", xcenter - 140, ycenter -90);
g.drawString(".",xcenter - 90,ycenter -140);
}
public void paint(Graphics g)
{
int xhour, yhour, xminute, yminute, xsecond, ysecond, second, minute, hour;
drawStructure(g);
currentDate = offsetTimeZone(new Date(), "Asia/Kolkata", timezone);
//System.out.println("date:"+currentDate);
formatter.applyPattern("s");
second = Integer.parseInt(formatter.format(currentDate));
formatter.applyPattern("m");
minute = Integer.parseInt(formatter.format(currentDate));
formatter.applyPattern("h");
hour = Integer.parseInt(formatter.format(currentDate));
//System.out.println("second="+second+",minute="+minute+",hour="+hour);
seconds = second;
minutes = minute;
hours = hour;
this.label.setBackground(Color.red);
label.setText(hours+" : "+minutes+" : "+seconds);
this.label.setBackground(Color.red);
xsecond = (int) (Math.cos(second * 3.14f / 30 - 3.14f / 2) * 120 + xcenter-20);
ysecond = (int) (Math.sin(second * 3.14f / 30 - 3.14f / 2) * 120 + ycenter-20);
xminute = (int) (Math.cos(minute * 3.14f / 30 - 3.14f / 2) * 100 + xcenter-20);
yminute = (int) (Math.sin(minute * 3.14f / 30 - 3.14f / 2) * 100 + ycenter-20);
xhour = (int) (Math.cos((hour * 30 + minute / 2) * 3.14f / 180 - 3.14f / 2) * 80 + xcenter-20);
yhour = (int) (Math.sin((hour * 30 + minute / 2) * 3.14f / 180 - 3.14f / 2) * 80 + ycenter-20);
// Erase if necessary, and redraw
g.setColor(Color.magenta);
if (xsecond != lastxs || ysecond != lastys)
g.drawLine(xcenter-20, ycenter-20, lastxs, lastys);
if (xminute != lastxm || yminute != lastym)
{
g.drawLine(xcenter-20, ycenter - 21, lastxm, lastym);
g.drawLine(xcenter - 21, ycenter-20, lastxm, lastym);
}
if (xhour != lastxh || yhour != lastyh)
{
g.drawLine(xcenter-20, ycenter - 21, lastxh, lastyh);
g.drawLine(xcenter - 21, ycenter-20, lastxh, lastyh);
}
g.setColor(Color.black);
g.drawLine(xcenter-20, ycenter-20, xsecond, ysecond);
g.setColor(Color.BLACK);
g.drawLine(xcenter-20, ycenter - 21, xminute, yminute);
g.drawLine(xcenter - 21, ycenter-20, xminute, yminute);
g.setColor(Color.BLACK);
g.drawLine(xcenter-20, ycenter - 21, xhour, yhour);
g.drawLine(xcenter - 21, ycenter-20, xhour, yhour);
lastxs = xsecond;
lastys = ysecond;
lastxm = xminute;
lastym = yminute;
lastxh = xhour;
lastyh = yhour;
}
public void start()
{
if (thread == null)
{
thread = new Thread(this);
thread.start();
}
}
public void stop()
{
thread = null;
}
public void run()
{
while (thread != null)
{
try
{
Thread.sleep(100);
}
catch (InterruptedException e){}
repaint();
}
thread = null;
}
public void update(Graphics g)
{
paint(g);
}
private static Date offsetTimeZone(Date date, String fromTZ, String toTZ)
{
// Construct FROM and TO TimeZone instances
TimeZone fromTimeZone = TimeZone.getTimeZone(fromTZ);
TimeZone toTimeZone = TimeZone.getTimeZone(toTZ);
// Get a Calendar instance using the default time zone and locale.
Calendar calendar = Calendar.getInstance();
// Set the calendar's time with the given date
calendar.setTimeZone(fromTimeZone);
calendar.setTime(date);
//System.out.println("Input: " + calendar.getTime() + " in " + fromTimeZone.getDisplayName());
// FROM TimeZone to UTC
calendar.add(Calendar.MILLISECOND, fromTimeZone.getRawOffset() * -1);
if (fromTimeZone.inDaylightTime(calendar.getTime()))
calendar.add(Calendar.MILLISECOND, calendar.getTimeZone().getDSTSavings() * -1);
// UTC to TO TimeZone
calendar.add(Calendar.MILLISECOND, toTimeZone.getRawOffset());
if (toTimeZone.inDaylightTime(calendar.getTime()))
calendar.add(Calendar.MILLISECOND, toTimeZone.getDSTSavings());
return calendar.getTime();
}
public static void main(String[] args) {
// TODO code application logic here
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setSize(350, 500);
window.setLayout(new GridBagLayout());
Clock clock = new Clock();
GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.HORIZONTAL;
c.ipady = 20; //make this component tall
//c.weightx = 0.0;
//c.gridwidth = 100;
c.ipadx=190;
c.gridx = 0;
c.gridy = 0;
window.setJMenuBar(jMenuBar1);
window.add(dropdown,c);
//window.add(Constants.p1);
//label.setSize(500, 100);
// label.setBackground(Color.black);
// Constants.p1.add(dropdown);
// Constants.p1.add(label);
c.fill = GridBagConstraints.HORIZONTAL;
c.ipady = 20; //make this component tall
//c.weightx = 0.0;
//c.gridwidth = 100;
c.gridx = 0;
c.gridy = 1;
window.add(label,c);
c.fill = GridBagConstraints.HORIZONTAL;
c.ipady = 300; //make this component tall
c.ipadx=300;
//c.weightx = 0.0;
c.gridwidth = 1000;
c.gridx = 0;
c.gridy = 2;
//window.add(dropdown,c);
window.add(clock,c);
//window.add(p2);
window.setVisible(true);
clock.start();
}
public Clock()
{
//Constants.p1.setSize(new Dimension(500, 500));
jMenu1.setText("View");
jMenu1.setToolTipText("");
jMenu1.setFont(new java.awt.Font("Segoe UI", 1, 12)); // NOI18N
jMenuItem1.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_1, java.awt.event.InputEvent.ALT_MASK));
jMenuItem1.setText("Tax Caculator");
jMenu1.add(jMenuItem1);
jMenuItem2.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_2, java.awt.event.InputEvent.ALT_MASK));
jMenuItem2.setText("Length Calculator");
jMenu1.add(jMenuItem2);
jMenuItem3.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_3, java.awt.event.InputEvent.ALT_MASK));
jMenuItem3.setText("Currency Calculator");
jMenu1.add(jMenuItem3);
jMenuItem4.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_4, java.awt.event.InputEvent.ALT_MASK));
jMenuItem4.setText("Time Calculator");
jMenu1.add(jMenuItem4);
jMenuBar1.add(jMenu1);
jMenu2.setText("Edit");
jMenuItem5.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_X, java.awt.event.InputEvent.CTRL_MASK));
jMenuItem5.setText("Cut");
jMenu2.add(jMenuItem5);
jMenuItem6.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_C, java.awt.event.InputEvent.CTRL_MASK));
jMenuItem6.setText("Copy");
jMenu2.add(jMenuItem6);
jMenuItem7.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_V, java.awt.event.InputEvent.CTRL_MASK));
jMenuItem7.setText("Paste");
jMenu2.add(jMenuItem7);
jMenuBar1.add(jMenu2);
jMenu3.setText("Help");
jMenuItem8.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_F1, 0));
jMenuItem8.setText("Help");
jMenu3.add(jMenuItem8);
jMenuItem9.setText("About Calculator");
jMenu3.add(jMenuItem9);
jMenuBar1.add(jMenu3);
dropdown.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent e)
{
Object instance = dropdown.getSelectedItem();
timezone = instance.toString();
//System.out.println(timezone);
repaint();
}
}