Answer to Question #20870 in Java | JSP | JSF for Mike Balensiefer

Question

I am trying to restrict character input in an option dialogue box.

ref:
http://www.roseindia.net/tutorial/java/swing/joptionpaneValidation.html

The code shown limits the string values that can be input.
(it can't keep you from entering a restricted value, it only alerts you to the entry.)
I am trying to get this code to work with a DOUBLE value.

So far I've been unsuccessful. Please help.

Answer 1

Anything entered in a JOptionPane is stored as a string inJava.
When using "JOptionPane.showInputDialog" you canonly check the result of the input.
If it is not satisfied, re-query input.
Or you can use JTextField (allows the use of any filters onthe input.)
More details here:
https://docs.oracle.com/javase/1.4.2/docs/api/javax/swing/JTextField.html