Java 9 Programming By Example

Types

Each variable has one type. In Java, there are two major groups of type: primitive and reference types. The primitive types are predefined, and you cannot define or create a new primitive type. There are eight primitive types: byte, short, int, long, float, double, boolean, and char.

The first four types, byte, short, int, and long, are signed numeric integer types, capable of storing positive and negative numbers on 8, 16, 32, and 64 bits.

The float and double types store floating point numbers on 32 and 64 bits in the IEEE 754 floating-point format.

The boolean type is a primitive type that can only be true or false.

The char type is a character data type that stores a single 16-bit Unicode character.

For each primitive type, there ...