Running character countdown in java?

Question

I can find plenty of Jquery/javascript examples but how is it done in java?

$(document).ready(function() {
    var text_max = 99;
    $('#textarea_feedback').html(text_max + ' characters remaining');

$('#textarea').keyup(function() {
    var text_length = $('#textarea').val().length;
    var text_remaining = text_max - text_length;

    $('#textarea_feedback').html(text_remaining + ' characters remaining');
    });
});

I've got (64)min/max(256) character input validation on an existing JTextArea but I'd also like a running character countdown to display beneath the textbox like on twitter or what not. No idea how to convert the above to strictly java, if at all ideal.

Are you looking for this: http://stackoverflow.com/a/7740500/3707125? — user3707125, Apr 09 '16 at 00:19

score 1 · Accepted Answer · answered Apr 09 '16 at 00:24

Use KeyListeners:

private int max_chrs = 256;

textarea.addKeyListener(new KeyListener(){
    @Override
    public void keyPressed(KeyEvent e){
         if(textarea.getText().length() >= this.max_chrs){
             e.consume();
         }
    }

    @Override
    public void keyTyped(KeyEvent e) {
    }

    @Override
    public void keyReleased(KeyEvent e) {
         label.setText( Integer.toString(this.max_chrs - textarea.getText().length()) );
    }
});

Thanks, although I used a DocListener instead so the the backspace key was available. — TabulaRasa, Apr 09 '16 at 14:28

Running character countdown in java?

1 Answers1