Java开发网 - 紧急求救,在线等回答,,,为什么会是这样?(运行时月会提前一个月)

Topic: 紧急求救,在线等回答,,,为什么会是这样?(运行时月会提前一个月)

1.紧急求救,在线等回答,,,为什么会是这样?(运行时月会提前一个月)

Posted by: wxfk12345
Posted on: 2005-12-04 08:50

本程序是完成显示系统当前时间的,为什么编译通过后,,系统日期是显示前一个月?郁闷中,本人是新手,不太了解,请各位高手们指导指导.

程序代码如下:

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
public class FrameTime extends JFrame implements Runnable,ActionListener
{
  private Thread duke;
  private JLabel yy,mm,dd,hh,ii,ss;
  private JButton stopst;
  private boolean flag;
  private JPanel pan;
  public static void main(String[] dd)
  {
    FrameTime tt = new FrameTime();
    tt.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    tt.show();
  }
  public FrameTime()
  {
    setTitle("当前时间");
    yy= new JLabel();
    mm= new JLabel();
    dd= new JLabel();
    hh= new JLabel();
    ii= new JLabel();
    ss= new JLabel();
    stopst= new JButton("开始");
   pan= new JPanel();
   // pan.setLaout(new BorderLayout());
   pan.add(yy);
   pan.add(mm);
   pan.add(dd);
   pan.add(hh);
   pan.add(ii);
   pan.add(ss);
   pan.add(stopst);
   getContentPane().add(pan);
   setSize(300,100);
   stopst.addActionListener(this);
   }
  public void start()
{
  flag=true;
  duke=new Thread(this);
  duke.start();
}
public void stop()
{
  flag=false;
  duke=null;
}
public void actionPerformed(ActionEvent d)
{
  boolean boo=(duke==null);
  if(boo)
  {
    stopst.setText(boo?"暂停":"开始");
    start();
  }
  else
  {
    stopst.setText(boo?"暂停":"开始");
    stop();
  }
}
public void run()
{
  while(flag)
  {
    repaint();
    GregorianCalendar cale = new GregorianCalendar();
    yy.setText(cale.get(Calendar.YEAR)+"年 ");
    mm.setText(cale.get(Calendar.MONTH)+"月");
    dd.setText(cale.get(Calendar.DATE)+"日");
    hh.setText(cale.get(Calendar.HOUR)+"时");
    ii.setText(cale.get(Calendar.MINUTE)+"分");
    ss.setText(cale.get(Calendar.SECOND)+"秒");
  }
}
}

不知怎么会这样,本人在线等您的指导.

2.Re:紧急求救,在线等回答,,,为什么会是这样? [Re: wxfk12345]	Copy to clipboard
Posted by: wmgreat Posted on: 2005-12-04 09:23 0月＝1月，Calendar类是从0开始记数的

3.Re:紧急求救,在线等回答,,,为什么会是这样? [Re: wxfk12345]	Copy to clipboard
Posted by: wxfk12345 Posted on: 2005-12-04 11:11 哦,谢谢~

4.Re:紧急求救,在线等回答(运行时为什么月会提前一个月) [Re: wmgreat]

Copy to clipboard

Posted by: why
Posted on: 2005-12-04 11:21

Don't double-post!! Sad

请尽量使用准确的文字描述作为标题
（甚至只是简单的错误信息）

若新帖再無恰当标题，可能会被刪除

http://java.sun.com/j2se/1.4.2/docs/api/java/util/Calendar.html#MONTH
The first month of the year is JANUARY which is 0

http://java.sun.com/j2se/1.4.2/docs/api/constant-values.html#java.util.Calendar.DECEMBER
public static final int DECEMBER 11
public static final int DST_OFFSET 16
public static final int ERA 0
public static final int FEBRUARY 1
public static final int FIELD_COUNT 17
public static final int FRIDAY 6
public static final int HOUR 10
public static final int HOUR_OF_DAY 11
public static final int JANUARY 0
public static final int JULY 6
public static final int JUNE 5
public static final int MARCH 2
public static final int MAY 4
public static final int MILLISECOND 14
public static final int MINUTE 12
public static final int MONDAY 2
public static final int MONTH 2
public static final int NOVEMBER 10
public static final int OCTOBER 9

5.Re:紧急求救,在线等回答,,,为什么会是这样? [Re: wxfk12345]	Copy to clipboard
Posted by: wxfk12345 Posted on: 2005-12-04 11:31 哦,~~~~明白了,我会注意的,谢谢提醒.