Handling of JOptionPane cancel button, which takes string as input

Question

I want to take input as string from user through a Input dialog box, and also handle the situation if user presses cancel button.

Any suggestions?

see `JOptionPane.showInputDialog` . https://docs.oracle.com/javase/7/docs/api/javax/swing/JOptionPane.html#showInputDialog(java.awt.Component,%20java.lang.Object) . `null` is returned if the user chooses "Cancel" . — Arnaud, May 02 '16 at 13:58
Why even SO community try to answer questions like that. Those type of question asked millions of times and still getting answers.. Just google your question. — Y.Kaan Yılmaz, May 02 '16 at 14:29

Arnaud · Accepted Answer · 2016-05-03T08:44:15.430

2

You may use the showInputDialog method of class JOptionPane .

If the user hits Cancel, the returned value is null.

Also note, as @mKorbel said in the comments, that you will also get null if the windows has been closed directly.

String result = JOptionPane.showInputDialog("Please enter something");

if(result == null){


    System.out.println("User pressed CANCEL, or window has been closed");
}
else{

    // do something with the String
}

edited May 03 '16 at 08:44

answered May 02 '16 at 14:17

Arnaud

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disagree, because `result != null`, `JOptionPane` has all `windows events` implemented in API (closing, event from escape key, .....) – mKorbel May 03 '16 at 08:26
@mKorbel : That's right, but will you agree that getting `null` at least means that the `Ok` button wasn't chosen ? – Arnaud May 03 '16 at 08:34
[there is something that I ....e.g. :-)](http://stackoverflow.com/a/8582851/714968) – mKorbel May 03 '16 at 08:37

score 1 · Answer 2 · edited Nov 17 '17 at 08:19

1

Try this:

if(result == null){
    System.out.println("User pressed CANCEL, or window has been closed");
    System.exit(0);
}

edited Nov 17 '17 at 08:19

Hexfire

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answered Nov 17 '17 at 07:23

Fran Campana

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Handling of JOptionPane cancel button, which takes string as input

2 Answers2