CODEWITHSUNDEEP
javaswingvalidationjtextfieldkeyevent
UnableToLoad
UnableToLoad

Reputation: 315

JTextField limit input to certains chars only

i'd like to create JTextField with input characters limited to someting like "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVXYWZZ0123456789+&@#/%?=~_-|!:,.;" so i tried overriding

public class CustomJTextField extends JTextField {  
String goodchars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVXYWZZ0123456789+&@#/%?=~_-|!:,.;";

//... my class body ...//

@Override
public void processKeyEvent(KeyEvent ev) {
    if(c != '\b' && goodchars.indexOf(c) == -1 ) {
        ev.consume();
        return;
    }
    else 
        super.processKeyEvent(ev);}}

but it isn't what i want because user cannot ctrl-c ctrl-v ctrl-x any more... so i addeded

&& ev.getKeyCode() != 17 && ev.getKeyCode() !=67 && ev.getKeyCode() != 86 && ev.getKeyCode() !=0 &&

to the if condition, but now the user can paste inappropriate input, ie '(' or '<', without any problem... what can i do?

Upvotes: 5

Views: 3848

Answers (2)

Xavjer
Xavjer

Reputation: 9274

Try a JFormattedTextField and use

MaskFormatter mf = new MaskFormatter();
mf.setValidCharacters("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVXYWZZ0123456789+&@#/%?=~_-|!:,.;");
JFormattedTextField textField = new JFormattedTextField(mf);

Edit: Sorry, that was the wrong code, here's the working one

Upvotes: 3

mKorbel
mKorbel

Reputation: 109823

maybe better would be use DocumentFilter with Pattern,

Upvotes: 7

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