What are primitive data types in Java?

Java 8Object Oriented ProgrammingProgramming

Java supports eight predefined primitive datatypes they are −

byte

  • Byte data type is an 8-bit signed two's complement integer
  • Minimum value is -128 (-2^7)
  • Maximum value is 127 (inclusive)(2^7 -1)
  • Default value is 0
  • Byte data type is used to save space in large arrays, mainly in place of integers, since a byte is four times smaller than an integer.

Example− byte a = 100, byte b = -50

short

  • Short data type is a 16-bit signed two's complement integer
  • Minimum value is -32,768 (-2^15)
  • Maximum value is 32,767 (inclusive) (2^15 -1)
  • Short data type can also be used to save memory as byte data type. A short is 2 times smaller than an integer
  • Default value is 0.
    Example− short s = 10000, short r = -20000

int

  • Int data type is a 32-bit signed two's complement integer.
  • Minimum value is - 2,147,483,648 (-2^31)
  • Maximum value is 2,147,483,647(inclusive) (2^31 -1)
  • Integer is generally used as the default data type for integral values unless there is a concern about memory.
  • The default value is 0
    Example− int a = 100000, int b = -200000

long

  • Long data type is a 64-bit signed two's complement integer
  • Minimum value is -9,223,372,036,854,775,808(-2^63)
  • Maximum value is 9,223,372,036,854,775,807 (inclusive)(2^63 -1)
  • This type is used when a wider range than int is needed
  • Default value is 0L
    Example− long a = 100000L, long b = -200000L

float

  • Float data type is a single-precision 32-bit IEEE 754 floating point
  • Float is mainly used to save memory in large arrays of floating point numbers
  • Default value is 0.0f
  • Float data type is never used for precise values such as currency
    Example− float f1 = 234.5f

double

  • double data type is a double-precision 64-bit IEEE 754 floating point
  • This data type is generally used as the default data type for decimal values, generally the default choice
  • Double data type should never be used for precise values such as currency
  • Default value is 0.0d
    Example− double d1 = 123.4

boolean

  • boolean data type represents one bit of information
  • There are only two possible values: true and false
  • This data type is used for simple flags that track true/false conditions
  • Default value is false
    Example− boolean one = true

char

  • char data type is a single 16-bit Unicode character
  • Minimum value is '\u0000' (or 0)
  • Maximum value is '\uffff' (or 65,535 inclusive)
  • Char data type is used to store any character
    Example − char letterA = 'A'
raja
Published on 09-Feb-2018 06:36:41
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