Java keyboard event listening (2)

[Java]
Package com. han;
 
Import java. awt. Container;
Import java. awt. FlowLayout;
 
Import javax. swing. JFrame;
Import javax. swing. JLabel;
Import javax. swing. JTextField;
 
/**
* Keyboard event listening (2)
* @ Author HAN
*
*/
Public class KeyEvent_2 extends JFrame {
 
/**
*
*/
Private static final long serialVersionUID = 85990168123754781_l;
 
Public KeyEvent_2 (){
// TODO Auto-generated constructor stub
Container container = getContentPane ();
Container. setLayout (new FlowLayout ());
JLabel label = new JLabel ("text box that allows only numbers to be entered :");
JTextField textField = new DigitOnlyField (10 );
Container. add (label );
Container. add (textField );

}
 
/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
KeyEvent_2 frame = new KeyEvent_2 ();
Frame. setTitle ("text box that allows only numbers to be entered ");
Frame. pack ();
Frame. setVisible (true); www.2cto.com
Frame. setdefaclocloseoperation (JFrame. EXIT_ON_CLOSE );
}
 
}

Package com. han;

Import java. awt. Container;
Import java. awt. FlowLayout;

Import javax. swing. JFrame;
Import javax. swing. JLabel;
Import javax. swing. JTextField;

/**
* Keyboard event listening (2)
* @ Author HAN
*
*/
Public class KeyEvent_2 extends JFrame {

/**
*
*/
Private static final long serialVersionUID = 85990168123754781_l;

Public KeyEvent_2 (){
// TODO Auto-generated constructor stub
Container container = getContentPane ();
Container. setLayout (new FlowLayout ());
JLabel label = new JLabel ("text box that allows only numbers to be entered :");
JTextField textField = new DigitOnlyField (10 );
Container. add (label );
Container. add (textField );

}

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
KeyEvent_2 frame = new KeyEvent_2 ();
Frame. setTitle ("text box that allows only numbers to be entered ");
Frame. pack ();
Frame. setVisible (true );
Frame. setdefaclocloseoperation (JFrame. EXIT_ON_CLOSE );
}

}

Author: Gaowen_HAN