primitive types in java

Primitive Types and Values

• A primitive type is predefined by the Java programming language and named by its reserved keyword

PrimitiveType:NumericType boolean
NumericType:IntegralTypeFloatingPointType
IntegralType: one ofbyte short int long char
FloatingPointType: one offloat double

• Primitive values do not share state with other primitive values.
• A variable whose type is a primitive type always holds a primitive value of that same type.
• The value of a variable of primitive type can be changed only by assignment operations on that variable and decrement operator.
• The numeric types are the integral types and the floating-point types.
• The integral types are byte, short, int, and long, whose values are 8-bit,16-bit, 32-bit and 64-bit signed two’s-complement integers, respectively, andchar, whose values are 16-bit unsigned integers representing UTF-16 code units.
• The floating-point types are float, whose values include the 32-bit IEEE 754
  floating-point numbers, and double, whose values include the 64-bit IEEE 754
  floating-point numbers.
• The boolean type has exactly two values: true and false.

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