Comments on: Setting maximum number of characters in JTextField

By: André

André — Fri, 03 Sep 2010 19:20:11 +0000

Thanks. This was fixed! But I changed the “IF” clause to insert the String part only if total length does not exceed the allowed length.

By: Java Java

Java Java — Tue, 31 Aug 2010 03:05:18 +0000

Thanks for your best turotial.
But I suggest you must use “str = null;” instead of “str = str.substring(0, maxChars);”. Because a run time error occurs when we use more than maxChars.

By: M.sh

M.sh — Fri, 13 Aug 2010 23:10:42 +0000

Thank you , Good Job

but i have a note that
if((getLength() + str.length() <= maxChars))
{
super.insertString(offs, str, a);
}
this condition is enough and i try it

thanks

By: André

André — Thu, 08 Jul 2010 13:24:02 +0000

Sorry, my mistake.

The correct operator is “!=”, not “==”. You should to use “str != null” because if str is null “str.length()” will throw NullPointerException.

Thanks for notice!

By: MoCsa

MoCsa — Thu, 08 Jul 2010 10:53:39 +0000

str==null why str=str.subString(0…..
I try it but wrong…

if (getLength() + str.length() > limit) {
str = str.substring(0, limit – getLength());

it’s worked

and create setMaxChars(int MaxChars) metod ofcourse