Here's everything you need to know about initializing Java classes and objects before executing them in the JVM.

Class – Everything in Java is associated with classes and objects. Being a user-defined blueprint, a class in simple terms represents the data structure which is used again and again.

Reference objects aren't just useful when memory is at a premium; they can also be used to provide slick caching abilities to any application.

Although Java lacks a true sizeof () equivalent, the Instrumentation interface introduced with J2SE5 can be used to get an estimate of the size of a particular object via its getObjectSize (Object ...