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One more special thing about strings is that you can concatenate two string objects using ‘+’ This is the relaxation java gives to string objects as they will be used most of the time while coding.
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.