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 ...

The more familiar you are with Object and its methods, the more you can do with your Java programs.

The String class already implements this interface, allowing string objects to be sorted by the Arrays class. To sort created objects, the programmer must implement the Comparable class methods in ...