I want to create a input dialog box when new record is created and save the user input as input into the file. When there is no user input or any input, the OK button work fine, but if I click the cancel button, it returns these errors:.

You should enter the try block only if the user clicks on "ok" or you should add an if to check if input is null before trying to use it! By posting your answer, you agree to the privacy policy and terms of service. Stack Overflow Questions Developer Jobs Documentation beta Tags Users.

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java - How to handle cancel button in JOptionPane - Stack Overflow

Stack Overflow is a community of 7. Join them; it only takes a minute: Error when cancel the showInputDialog Ask Question. Here joptionpane.showinputdialog cancel the code: Exception in cms uk forex brokers reviews "AWT-EventQueue-0" java.

Chin 3 8 Andrew Thompson k 21 Sorry again for my tiny question.

It may be of some use to mention that not all JOptionPane. Only scanf optional argument method with the largest number of parameters claims to return null if Cancel was clicked. The Java Docs can be a little obtuse at times, and 'presume' knowledge that is not apparent to the user us. I can almost see the programmer as they had the source code open and were forced to write code comments.

It was 'obvious' to them than each shorter version, called the more operands version with null or standard defaults - so it never occurred to them to mention that in the docs.

I am pretty sure we can assume that, but it would be nice to see that explicitly documented. Or at least see 'version this uses for more detail. If the user clicks on "cancel", input will be null.

java - JOptionPane cancel button - Stack Overflow

Now, you can actually disable the cancel button with JOptionPane. StepTNT 1, 3 25 Thanks for the explanation. Sign up or log in StackExchange.

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