integerinputfield.java

一个应用timer的小程序

package net.sujee.util;

import net.sujee.util.InputField;

import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;



public class IntegerInputField extends InputField
{

   int mMinValue, mMaxValue;

   public IntegerInputField (int min, int max)
   {
      super ();
      if ( max >= min)
      {
         mMinValue = min;
         mMaxValue = max;
      }
      else
         mMinValue = mMaxValue = 0;  // he he :-)
    }

    public boolean isValidValue(String valString)
    {
          int value = mMinValue - 1;
            try
            {
            value = Integer.parseInt(valString);

            }
            catch (NumberFormatException ex)
            {
            }

         if (  (value >= mMinValue) && (value <= mMaxValue) )
            return true;
         else
            return false;

    }


    public int getValue ()  throws NumberFormatException
    {
       return Integer.parseInt(getText());

    }


    public void setValue (int i)
    {
       setText(""+i);
    }


   public static void main (String [] args)
   {
      JFrame frame = new JFrame ("Number Test");
      frame.getRootPane().setLayout(new GridLayout (2,2));
      frame.getRootPane().add (new JLabel ("Value (b/w 1-10"));
      frame.getRootPane().add (new IntegerInputField (1,10));
      frame.getRootPane().add (new JLabel ("Dummy (-10 - 10)"));
      frame.getRootPane().add (new IntegerInputField (-10, 10));

      frame.setDefaultCloseOperation(3);
      frame.setSize(500,500);
      frame.pack();
      frame.show();

   }
}