Class JTextTools

java.lang.Object
  |
  +--JTextTools

public class JTextTools

extends java.lang.Object

A number of useful methods for dealing with JTextFields.

Constructor Summary

JTextTools()

Method Summary

static void	dealWithInvalidValue(javax.swing.JTextField jTxt) Method for dealing with an invalid value in a JTextField.
static double	getDouble(javax.swing.JTextField jTxt, javax.swing.JTextArea jTxtArea, java.lang.String errMessage) Method for getting a double value from a JTextField.
static int	getInt(javax.swing.JTextField jTxt, javax.swing.JTextArea jTxtArea, java.lang.String errMessage) Method for getting an int value from a JTextField.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JTextTools

public JTextTools()

Method Detail

dealWithInvalidValue

public static void dealWithInvalidValue(javax.swing.JTextField jTxt)

Method for dealing with an invalid value in a JTextField. The method clears the text field and sets the focus on it, after which it throws an IllegalArgumentException.

Parameters:

jTxt - the JTextField

Throws:

java.lang.IllegalArgumentException - always thrown

getDouble

public static double getDouble(javax.swing.JTextField jTxt,
                               javax.swing.JTextArea jTxtArea,
                               java.lang.String errMessage)

Method for getting a double value from a JTextField. If the value is not valid an error message is appended to the text area and then dealWithInvalidValue is called resulting in an IllegalArgumentException being thrown. Otherwise the value read from the text field is returned.

Parameters:

jTxt - the JTextField

jTxtArea - the JTextArea

errMessage - the error message to be appended to the text area

Throws:

java.lang.IllegalArgumentException - if text field contains an invalid value

getInt

public static int getInt(javax.swing.JTextField jTxt,
                         javax.swing.JTextArea jTxtArea,
                         java.lang.String errMessage)

Method for getting an int value from a JTextField. If the value is not valid then dealWithInvalidValue is called resulting in an IllegalArgumentException being thrown. Otherwise the value read from the text field is returned.

Parameters:

jTxt - the JTextField

jTxtArea - the JTextArea

errMessage - the error message to be appended to the text area

Throws:

java.lang.IllegalArgumentException - if text field contains an invalid value