高分求解决方案,为什么我JComboBox选择了却没效果
这是个日历程序,我想通过选择月份改变每月的日历.为什么选择却没有效果呢?
package   Calendar;

import   java.awt.*;
import   java.awt.event.*;
import   javax.swing.*;
import   java.util.*;

class   Calendarday   extends   JPanel   {

private   JPanel   dayPanel;

private   static   int   count   =   0;

private   JLabel[]   label;

private   static   final   GregorianCalendar   d   =   new   GregorianCalendar();
private   static   final   GregorianCalendar   day   =   new   GregorianCalendar();

public   void   setMonth(int   month){
d.set(Calendar.MONTH,   month-1);
day.set(Calendar.MONTH,   month-1);
System.out.println(d.get(Calendar.MONTH));
}

public   void   setYear(int   year){
d.set(Calendar.YEAR,   year);
day.set(Calendar.YEAR,   year);
}
public   Calendarday()   {
//   日期容器开始:

day.set(Calendar.DAY_OF_MONTH,   1);
int   weekday   =   day.get(Calendar.DAY_OF_WEEK);

dayPanel   =   new   JPanel();
//   根据每月的第一天来判断,决定日期表格容器的大小:
if   (weekday   ==   7   ||   weekday==6)   {
dayPanel.setLayout(new   GridLayout(6,   7));
label   =   new   JLabel[42];
for   (int   i   =   0;   i   <   label.length;   i++)   {
label[i]   =   new   JLabel( "       ");
dayPanel.add(label[i]);
}
}   else   {
dayPanel.setLayout(new   GridLayout(5,   7));
label   =   new   JLabel[35];
for   (int   i   =   0;   i   <   label.length;   i++)   {
label[i]   =   new   JLabel( "       ");
dayPanel.add(label[i]);
label[i].addMouseListener(new   mousel());
}

}
//   日期表格容器结束;

printcalendar();
}


//   输出日期表
public   void   printcalendar()   {
int   today   =   d.get(Calendar.DAY_OF_MONTH);
int   month   =   d.get(Calendar.MONTH);


d.set(Calendar.DAY_OF_MONTH,   1);
int   weekday   =   d.get(Calendar.DAY_OF_WEEK);

for   (int   i   =   Calendar.SUNDAY;   i   <   weekday;   i++)   {
label[count].setText( "       ");
count++;
}
System.out.println(month+ "ss ");
do   {
int   day   =   d.get(Calendar.DAY_OF_MONTH);
label[count].setText(Integer.toString(day));
if   (day   ==   today)   {
label[count].setText(label[count].getText()   +   "* ");
}   else   {
label[count].setText(label[count].getText()   +   "     ");
}

d.add(Calendar.DAY_OF_MONTH,   1);
weekday   =   d.get(Calendar.DAY_OF_WEEK);
count++;
}   while   (d.get(Calendar.MONTH)   ==   month);
count=0;
}

private   class   mousel   extends   MouseAdapter{

public   void   mousePressed(MouseEvent   event){}
public   void   mouseClicked(MouseEvent   event){}