import java.awt.*;
import java.awt.event.*;

public class TextFieldWithLimit extends TextField 
   implements KeyListener {
   private int  maxLength;
   public TextFieldWithLimit 
          (String initialStr,int col,int maxLength) {
     super(initialStr,col);
     this.maxLength = maxLength;
     addKeyListener(this);
     }
   public TextFieldWithLimit (int col,int maxLength) {
     this("",col,maxLength);
     }

   public void keyPressed(KeyEvent e) { 
    char c = e.getKeyChar();
    int len = getText().length();
    if (len < maxLength) {
      return;
      }
    else {
      if((c==KeyEvent.VK_BACK_SPACE)||
        (c==KeyEvent.VK_DELETE) ||
        (c==KeyEvent.VK_ENTER)|| 
        (c==KeyEvent.VK_TAB)||
         e.isActionKey())
         return;
      else {
         e.consume(); 
         }
      }
   }
   public void keyReleased(KeyEvent e) { }
   public void keyTyped(KeyEvent e) { }
   }