The boolean Primitive
The simplest data type available to you in Java is the primitive type boolean. A boolean variable has only two possible values, true or false, which are represented with reserved words. In some other languages, Boolean types take on values of 0 or 1; or, as in C/C++, 0 represents false and all other numbers are interpreted as true. Java treats boolean in a strict and type-safe manner by tightly restricting its allowed values. A boolean can never be treated as an integer or vice versa.
boolean variables are often used when you want to keep track of the state of a simple object attribute. For instance, if you are writing a flight scheduling application, whether a given flight is on time is important to you. You might declare ...
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