Table of Contents

Overview

Java data types are keywords used to allocate memory space for the data variables. A data type is used for representing the data in the RAM( Random-access Memory) of the computer.

Data types in the Java programing language can be broadly classified into the following categories: primitive data types and non-primitive data types.

- Primitive data types
- Non-Primitive data types
- User-defined data types

Java Data Types

Java is a statically typed language. The program variables must be declared before using them. We need to specify the variable’s data type and the variable name.

Primitive Data Types

Primitive data types are those whose variables allow us to store only one value at a time. Java is a strongly typed language. It means that every variable has a type. Java has eight primitive data types.

They can be further classified into the following categories:

Numeric Data types

byte
short
int
long

Floating point

float
double

Non-Numeric

boolean
char

Derived data types

Derived data types are those whose variables allow us to store multiple values of the same type. For example, an array. We cannot store values of different types.