Write once, debug/test everywhere is a variant on Java's write once, run anywhere claim, and it defines the Java Platform Debugger Architecture (JPDA). The JPDA is a client/server system built from ...

The Java Class File Disassembler (javap) is a useful tool for the Java developer that I have referenced in previous blog posts covering a variety of contexts such as detecting the innards of a Groovy ...

Inheritance and composition are two programming techniques developers use to establish the relationship between classes and objects. Whereas inheritance derives one class from another, composition ...

Hi,<BR><BR>there is a bug in my application which uses many classes. I have a variable that is properly set, initially. Then, when I want to use it, it is somehow null. <BR>I am using eclipse. Java.