Can we extend JTextField with Listeners
Hello,
I am new to Java, I was trying to JTextField and implementing listeners also to make a new class so as to make make it more user friendly.
The code I had written is given below.
Though the TextField is working as it should, the validations are not taking place.
Please mail me a copy of the answer at guptaabrasives@vsnl.com
The code is :
//File Name is: ATextField.java// ATextField.java
import java.awt.event.*;
import javax.swing.*;
public class ATextField extends JTextField implements KeyListener, FocusListener
{
//int fieldLength = this.getText().length();
char fType;
boolean validEntry = true;
String tTip;
public ATextField(int fLength, String toolTip, char FieldType)
{
super(fLength);
this.setToolTipText("Enter "+toolTip+" here");
fType= FieldType;
tTip=toolTip;
addFocusListener(this);
addKeyListener(this);
}
public void keyTyped(KeyEvent e)
{
JTextField thisField = (JTextField)e.getSource();
boolean aError = false ;
char c = e.getKeyChar();
int keyCode = e.getKeyCode();
if ((fType == 'N' || fType == 'n') && (keyCode <48 || keyCode > 57))
{
//beep();
e.setKeyCode(0);
}
if ((fType == 'D' || fType == 'd') && ((thisField.getText().length()==3 || thisField.getText().length() == 6) && (c != '/' || c!='-' || c != '.')))
{
e.setKeyCode(0);
}
else if ((fType == 'D' || fType == 'd') && (keyCode <48 || keyCode > 57))
{
//beep();
e.setKeyCode(0);
}
}
public void keyPressed(KeyEvent e)
{
}
public void keyReleased(KeyEvent e)
{
}
public void focusGained(FocusEvent e)
{
}
public void focusLost(FocusEvent e)
{
}
public boolean chkNullEntry()
{
String s1 = this.getText();
boolean aError = false;
if (s1.length() ==0)
{
return true ;
}
else
return false;
}
public boolean valid()
{
return validEntry;
}
}
