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Hacking 'Package Protected' variables in a Java Class

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Goldy Lukka

Posts: 1008
Nickname: xyling
Registered: Jan, 2004

Goldy Lukka is a Java Developer and an Entrepreneur. He is Founder of xyling.com.

Hacking 'Package Protected' variables in a Java Class

Posted: May 28, 2004 2:11 AM

This post originated from an RSS feed registered with Java Buzz by Goldy Lukka.
Original Post: Hacking 'Package Protected' variables in a Java Class Feed Title: Xyling Java Blogs Feed URL: http://www.javablogs.xyling.com/thisWeek.rss Feed Description: Your one stop source for Java Related Resources.	Latest Java Buzz Posts Latest Java Buzz Posts by Goldy Lukka Latest Posts From Xyling Java Blogs

Is this a normal behaviour or a security issue?
Recently, while working on my J2ME based project, I had to create my own TextField with some added features like a cursor. I planned extending the TextField class (package javax.microedition.lcdui) and add my own behaviour. But!! the members keyPressed, keyRelease and graphics object were all package protected.
I desperately needed this behaviour and thought of one trick. I made MyTextField Class being in the package javax.microedition.lcdui (of course by the package declaration statement). And VOILA! it worked well....

So the next time whenever you need to excess any package protected variables (even if they belong to VM core classes) just put your class in the same package name.

ENJOY!!!

[Resource-Type: Tip; Category: Java/All]

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