Data Types in Java

Data types are different sizes and values that can be stored in the variable is knows as Data types in Java Programming.

Types

There are two types of Data Types in Java

• Primitive data types
• Non-primitive data types

Primitive Data Types in JAVA

 Primitive data type specifies the size and type of variable values. It has no additional methods is knows as Primitive Data Types.

There are Eight types of Primitive Data types

• Boolean data type
• Byte data type
• Char data type
• Short data type
• Int data type
• Long data type
• Float data type
• Double data type

Boolean Data Types

Boolean data type represents only one bit of information either true or false values.

Size: 1 bit

Values:  true or false

Default Value: false

Syntax

boolean booleanVar;

Example of Boolean Data Types

Input Value

public class bool {
 
    public static void main(String[] args) {
 
        int x = 20;
        System.out.println(x == 15);
        System.out.println(x == 20);
        System.out.println(x < 35);
        System.out.println(x >= 10);
        System.out.println(x <= 15);

         
    }
 
}

Boolean Data Types

Let’s Run the code

Output Values

Byte data type

The byte data type is an 8-bit signed two’s complement integer.

Size: 1 byte or (8 bit)

Values: -128 to 127

Default Value: 0

Syntax

byte byteVar;

Example of Byte data type

Input Value

public class bytevariable{
	
	public static void main(String[] args) {
		
		byte a = 15;
		byte b = 25;
	
		System.out.println("The sum of variable is :"+ (a+b));	
	}
}

Byte data type

Let’s Run the code

Char data type

This data type is a single 16-bit Unicode character.

Size: 2 byte or (16 bits)

Values: ‘\u0000’ or (0) to ‘\uffff’ (65535)

Default Value: ‘\u0000’

Syntax

char charVar;

Example Char data type

Input Value

public class example {  
  
    public static void main(String[] args) {  
  
        char a='x';  
        char b='y';  
          
  
        System.out.println("char: "+a);  
        System.out.println("char: "+b);                  
    }         
}  

Char data type

Let’s Run the code

Output Value

Short data type

The short data type is a 16-bit signed two’s complement integer.

Size: 2 byte or (16 bits)

Values: -32, 768 to 32, 767 (inclusive)

Default Value: 0

Syntax

short shortVar;

Example of Short data type

Input Value

public class shortvariable {
    public static void main(String[]args) {
        short a = 44;
        short b = 52;
        System.out.println("x:"+a);
        System.out.println("y:"+b);
        
    }
}

Short data type

Let’s Run the code

Output Value

Int data type

It is a 32-bit signed two’s complement integer.

Size: 4 byte or ( 32 bits )

Values: -2, 147, 483, 648 to 2, 147, 483, 647 

Default Value: 0

Syntax

int intVar;

Example of int data type

Input Value

public class intvariable {
    

public static void main(String[] args)  
{  
int a=10;  
int b= 12;
System.out.println(" "+a);   
System.out.println(" "+b); 
System.out.println(" sum of two num : "+(a+b)); 
}  
 
}

Int data type

Let’s Run the code

Output Value

Long data type

The range of a long is quite large. The long data type is a 64-bit two’s complement integer.

Size: 8 byte (64 bits)

Values: {-9, 223, 372, 036, 854, 775, 808} to {9, 223, 372, 036, 854, 775, 807}

Default Value: 0

Syntax

long longVar;

Example of long data type

Input Value

public class longvariable {
    
public static void main(String...k)  
{  
long a=4500000;  
long b=-4466854;  
System.out.println("num1 : "+a);  
System.out.println("num2 : "+b); 
System.out.println("sum of two num : "+(a+b));  
}  
 
}

Long data type

Let’s Run the code

Output Value

Float data type

The float data type is a single-precision 32-bit IEEE 754 floating-point

Size: 4 byte (32 bits)

Values: upto 7 decimal digits

Default Value: 0.0f

Syntax

float floatVar;

Example of Float data type

Input Value

public class floatvariable {
     
        public static void main(String[] args) {  
              
            float a=12.2f;  
            float b=8f;  
            System.out.println("num1: "+a);  
            System.out.println("num2: "+b);  
            System.out.println("sum of two num : "+(a+b)); 
        }     
      
}

Float data type

Let’s Run the code

Output Value

Double data type

The double data type is a double-precision 64-bit IEEE 754 floating-point.

Size: 8 bytes or 64 bits

Values: Upto 16 decimal digits

Default Value: 0.0d

Syntax

double doubleVar;

Example of double data type

Input Value

public class doublevariable {
  
  
        public static void main(String[] args) {  
              
            double a=454847.15645; 
            double b=42.25488559;
            System.out.println("num : "+a);   
            System.out.println("num : "+b);    
            System.out.println("sum of two num : "+(a+b));     
        }     
 
}

Double data type

Let’s Run the code

Output Value

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