dateinputfield.java

一个应用timer的小程序

package net.sujee.util;

import java.awt.GridLayout;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.util.Date;
import java.util.Calendar;
import java.util.GregorianCalendar;

public class DateInputField extends JPanel implements ActionListener
{
   IntegerInputField mYearField,  mDayField;
   JComboBox mMonthCombo;
   /*
   String mMonthArray [] = {  "January", "February", "March",
       				"April", "May", "June",
           			"July", "August", "September",
              			"October", "November", "December"
    				};
        */
   String mMonthArray [] = {  "Jan", "Feb", "Mar",
       				"Apr", "May", "Jun",
           			"Jul", "Aug", "Sep",
              			"Oct", "Nov", "Dec"
    				};


   int mDayArray [] = { 31,	28,	31,
      			30,	31,	30,
         		31,	31,	30,
           		31,	30,	31
             		};

   public DateInputField ()
   {
      this (new Date ());
   }

   public DateInputField (Date d)
   {
      super (new FlowLayout (FlowLayout.CENTER,10,2));
      Calendar cal = Calendar.getInstance();
      cal.setTime(d);
      mYearField = new IntegerInputField (0, Integer.MAX_VALUE);
      mYearField.setText("" + cal.get (cal.YEAR));
      mDayField = new IntegerInputField (0,31);
      mDayField.setText ( "" + cal.get (cal.DATE));
      setLayout(new GridLayout (1,6));

      mMonthCombo = new JComboBox (mMonthArray);
      mMonthCombo.addActionListener(this);
      mMonthCombo.setSelectedIndex(cal.get (Calendar.MONTH));

      add (mDayField);
      add (mMonthCombo);
      add (mYearField);
   }


   public Date getDate ()
   {
      int year = 0,
          month = 0,
          day = 1;
      try
      {
         year = Integer.parseInt(mYearField.getText());
         month = mMonthCombo.getSelectedIndex();
         	// Java months are from 0 - 11
          	// in month field, we ask for 1-12
         day = Integer.parseInt(mDayField.getText());
      }
      catch (NumberFormatException e)
      {
      }
      GregorianCalendar cal = new GregorianCalendar (year,month,day);
      return cal.getTime();
   }

   public boolean setDate (int date, int month, int year)
   {
      Calendar cal = Calendar.getInstance();
      try
      {
         cal.set(Calendar.DATE, date);
         cal.set(Calendar.MONTH, month);
         cal.set(Calendar.YEAR, year);

        mDayField.setValue (date);
        mMonthCombo.setSelectedIndex (month);
        mYearField.setValue (year);
        return true;
      }
      catch (Exception e)
      {
         return false;
      }
   }


   public void setEnabled(boolean b)
   {
      super.setEnabled(b);
      mDayField.setEnabled(b);
      mMonthCombo.setEnabled(b);
      mYearField.setEnabled(b);
   }


   public void actionPerformed(ActionEvent e)
   {
      Object src = e.getSource();
      if (src == mMonthCombo)
      {
         int date =  mDayField.getValue();
         if ( (date <= 0) || (date > mDayArray[mMonthCombo.getSelectedIndex()]) )
            mDayField.flagError();
         else
            mDayField.clearError();

      }
   }

   public static void main (String [] args)
   {
      JFrame f = new JFrame ("DateInputField2 Test");
      DateInputField d = new DateInputField ();
      f.getContentPane().add(d);
      f.setSize (200,50);
      f.setDefaultCloseOperation(3);
      f.show();
      //d.setEnabled(false);

      System.out.println("Date is : " + d.getDate().toString());
   }
}