Why use typesafe enums, not enumerated types. An enumerated type specifies a set of related constants as its values. Examples include the days in a week, the standard north/south/east/west compass ...

Values for boolean are initialized to false. Values for floats and doubles are initialized to 0.0. Values for byte, short, int and long are set to 0. A char is set to Unicode's null character \u0000.

Java interfaces are different from classes, and it’s important to know how to use their special properties in your Java programs. This tutorial introduces the difference between classes and ...