Re: latest 500 lines in a JtextArea inside a JScrollPane

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 22 Jul 2009 09:22:57 -0700

Message-ID:

<4a673ce1$0$5422$b9f67a60@news.newsdemon.com>

etantonio wrote:

Good morning,
I've a JtextArea inside a JScrollPane,
I use an append to add lines to the JtextArea , my problem is that the
lines I add are very much so at the end this crash JVM, there's an
automatic way to limit the number of lines in the jtextarea in a way
that for example I've only latest 500 lines ?

Thanks,

Antonio
www.etantonio.it/en

I use the following code all the time for a logging window so I don't
have overflow problems. When the limit is exceeded, some of the front
of the document is removed.

//
//
// LengthLimitedDocument
//
//

package com.knutejohnson.classes;

import javax.swing.text.*;

public class LengthLimitedDocument extends PlainDocument {
     private int limit;

     public LengthLimitedDocument(int limit) {
         this.limit = limit;
     }

     public void insertString(int offs, String str, AttributeSet a)
      throws BadLocationException {
         super.insertString(offs, str, a);
         int length = getLength();
         if (length > limit)
             remove(0,limit/20); // remove 5% of document if over limit
     }
}

--

Knute Johnson
email s/nospam/knute2009/

--
Posted via NewsDemon.com - Premium Uncensored Newsgroup Service
         ------->>>>>>http://www.NewsDemon.com<<<<<<------
Unlimited Access, Anonymous Accounts, Uncensored Broadband Access