Data types in Java

Data types specifies the types of value and its size that can be stored in an identifier. There are 2 types of data types as given below.

  1. Primitive data types
  2. Non-Primitive/Reference data types


Datatype Description Example Default value
byte Can be used for saving memory in large arrays.It is four
times smaller than an int.
byte a =100 0
short Can be used for saving memory in large arrays.It is two
times smaller than an int.
short x=1000 0
int int is generally use as default data type,unless there is memory concern int x=1000 0
long It is used when larger value than int is needed. int x=100000L 0L
float use it if needs to save memory in large arrays of floating point numbers. int x=176.8f 0.0f
double It is generally used as default value for decimal values. int d=176.8 0.0d
boolean Its 2 possible value are – true and false. boolean name=true false
char Char data type is used to store any character. char c =”A” ‘\u0000’
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