gravsphcolldemo
Class DoubleInputVerifier

java.lang.Object
  |
  +--javax.swing.InputVerifier
        |
        +--gravsphcolldemo.DoubleInputVerifier

public class DoubleInputVerifier

extends javax.swing.InputVerifier

This is an InputVerifier object for swing JTextField objects that verifies whether the value entered can be parsed as a double.

Version:

May 2001

Author:

Miklos Reiter

Constructor Summary

DoubleInputVerifier()
Constructs a new DoubleInputVerifier object.

DoubleInputVerifier(boolean emptyEntryAccepted)
Constructs a new DoubleInputVerifier object.

Method Summary

boolean	getAcceptEmpty() Is the empty string accepted as a valid entry?
void	setAcceptEmpty(boolean emptyEntryAccepted) Sets whether the empty string should be accepted as valid.
boolean	shouldYieldFocus(javax.swing.JComponent input) Displays a message box complaining to the user and informing them briefly of the format of a double, if the input is invalid, in addition to calling the inherited method.
boolean	verify(javax.swing.JComponent input) Casts the argument to a JTextField and tries to parse its text as a double.

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleInputVerifier

public DoubleInputVerifier()

Constructs a new DoubleInputVerifier object. This verifier will accept the empty string as a valid entry.

DoubleInputVerifier

public DoubleInputVerifier(boolean emptyEntryAccepted)

Constructs a new DoubleInputVerifier object.

Method Detail

getAcceptEmpty

public boolean getAcceptEmpty()

Is the empty string accepted as a valid entry?

setAcceptEmpty

public void setAcceptEmpty(boolean emptyEntryAccepted)

Sets whether the empty string should be accepted as valid.

shouldYieldFocus

public boolean shouldYieldFocus(javax.swing.JComponent input)

Displays a message box complaining to the user and informing them briefly of the format of a double, if the input is invalid, in addition to calling the inherited method.

Overrides:

shouldYieldFocus in class javax.swing.InputVerifier

verify

public boolean verify(javax.swing.JComponent input)

Casts the argument to a JTextField and tries to parse its text as a double. Returns true if it succeeds, false otherwise.

Overrides:

verify in class javax.swing.InputVerifier