JAVA : Introduction of Data Types

Hy guyz welcome,
Todays Post is related to Data Types in Java,

Well First We going to know about Data Types 

So,

Data Types & Need :-  

"Data types are used to store data temporarily in computer through a program.In real world we have Different types of data like integer,Boolean,float etc . To Store all these types of data in program to perform business required calculation and validations we must use data types concept." 

well in my way  Data type is a something which gives information about -

• Size of the memory location and range of the data that can be accommodated inside that location.
• Possible legal operations those can be performed on that location.
• Data types specify size and the type of values that can be stored in an identifier.

Types of Data Types:-  

 This is a Types of Data Types in java

So,

There are two types of Data types in java.

1. Primitive Data types

2. Non-Primitive Data Types

Now,

Primitive Data Types :- 

                                                         

 "The Primitive types are used to store single value at a time .There are eight primitive data types supported by Java. Primitive data types are predefined by the language and named by a keyword."

lets see...

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 int.
• 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 int
• 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)
• Int 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'

So Now These was The Primitive Data Types

Now,

Non-Primitive / Referenced Data Types :-  

                                                                                                           

Well Referenced data types is nothing but Reference variables are created using defined constructors of the classes. 

They are used to access objects. These variables are declared to be of a specific type that cannot be changed. For example, Employee, Puppy etc.

Class objects, and various type of array variables come under reference data type.

Default value of any reference variable is null.

A reference variable can be used to refer to any object of the declared type or any compatible type.

Example: Animal animal = new Animal("giraffe");

So this is a Different Data Types 

Thank uh... 

----------------------------------------------------------------------------------------------------------------------------------