Core Java: Short-Circuit Operation

The logical AND (&&) and OR (||) operators are known as short-circuit operators, meaning that the right operand will not be evaluated if the result can be determined by the left operand.

 For example:

false && ... gives false; true || ... give true without evaluating the right operand.

  

This may have adverse consequences if you rely on the right operand to perform certain operations, e.g. false && (++i < 5) but ++i will not be evaluated.