data type in java

DATA TYPES IN JAVA PART . 9

Data Types in Java

Data types in java under the following categories :

1 :- Primitive Data Types (intrinsic)

2 :- Non Primitive Data Types (Derived)

Primitive Data Types

Primitive Data Types

Java is statically typed i.e. variables must be declared before use.

There are 8 Primitive Data Types supported by Java :

1 :- byte :      A value ranges from -128 to 127

                         Takes 1 byte

                         Default value is 0

2 :- short :    A value ranges from –(216)/2 to (216)/2-1

                         Takes 1 byte

                         Default value is 0

3 :- int :        A  value ranges from -–(232)/2 to (232)/2-1                

                         Takes 2to4 byte

                         Default value is 0

4 :- float :     A  value ranges from

                         Takes 4  byte

                         Default value is 0.0

5 :- long  :    A  value ranges from -–(264)/2 to (264)/2-1                

                         Takes 8  byte

                         Default value is 0

6 :-  double : A  value ranges from

                         Takes 8  byte

                         Default value is 0.0

7  :-  char  : A value ranges from 0 to 6553(216 – 1)

                         Takes 2  byte

                         Default value is

8 :-  Boolean : A value can be true or false                

                          Size depend on  JVM

                          Default value is  false

HOW TO CHOOSE DATA TYPES FOR OUR VARIABLES  :

In order to choose the data type we first we need to find to find the type of data , we want to store. After that, we need to analyze the min and max value we might use.

Non Primitive Data Types :

Non Primitive Data Types

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