This document discusses Java data types. It explains that variables reserve memory locations and the data type determines what memory is allocated and what values can be stored. There are two main data types in Java: primitive types and reference types. The primitive types are predefined by Java and include byte, short, int, long, float, double, boolean and char. Reference types refer to objects.

1. Java – Data Type
Organized By: Vinay Arora
Assistant Professor
CSED, Thapar University
www.slideshare.net/aroravinay

2. Vinay Arora
CSED
Data type/s for the variable/s
 Variables are nothing but reserved memory locations to store
values.
 This means that when you create a variable you reserve some
space in memory.
 Based on the data type of a variable, the operating system
allocates memory and decides what can be stored in the
reserved memory.
 There are two data types available in Java:
Primitive Data Types
Reference/Object Data Types

3. Vinay Arora
CSED
Primitive Data Types
 There are eight primitive data types supported by Java. Primitive
data types are predefined by the language and named by a
keyword.
 Byte
 Short
 Int
 Long
 Float
 Double
 Boolean
 Char

4. Vinay Arora
CSED
Primitive Data Types (Conti…)

5. Vinay Arora
CSED
Primitive Data Types (Conti…)

6. Vinay Arora
CSED
Primitive Data Types (Conti…)

7. Vinay Arora
CSED
Primitive Data Types (Conti…)

8. Vinay Arora
CSED
Primitive Data Types (Conti…)

9. Vinay Arora
CSED
Reference Data Type

10. Vinay Arora
CSED
Java Literals

11. Vinay Arora
CSED
Thnx…