Different Data type in Java

There are 8 different data types, there are byte, short, int, long, char, float, double, boolean.

These data type are grouped in to 4 groups

Integers:-

These data type is used to define whole numbers like 2, 54, 69 etc.

This group include byte, short, int and long.

Example:-

class data_int{

public static void main(String arg[]){

int num1, num2,sum1;

// example for int

num1 = 10;

num2 = 20;

sum1 = num1+num2;

System.out.println("The sum of 2 value:"+sum1);

// example for long

long num3, num4, sum2;

num3=5869;

num4=89874;

sum2 = num3 + num4;

System.out.println("The sum of 2 value:"+sum2);

// example for short

short num5;

num5=889;

System.out.println("The num5 value is:"+num5);

// example for byte

byte num6;

num6=9;

System.out.println("The num5 value is:"+num6);

}

}

Output

The sum of 2 value:30

The sum of 2 value:95743

The num5 value is:889

The num5 value is:9

Floating Point:-

These one is used to define number with fractional precision like 2.5, 5.0, 6.689 etc.

These group include float and double.

class data_float{

public static void main(String arg[]){

float num1, num2, sum1;

// example for float

num1 = 5;

num2 = 2;

sum1 = num1+num2;

System.out.println("The sum of 2 value:"+sum1);

// example for double

double num3, num4 = 0, sum2;

num3=58.69;

num4=8987.4;

sum2 = num3 + num4;

System.out.println("The sum of 2 value:"+sum2);

}

}

Output

The sum of 2 value:7.0

The sum of 2 value:9046.09

Characters:-

Character is used to define character set like letters and numbers.

The Character group include only one data type char.

Example:-

class data_char{

public static void main(String arg[]){

char data;

// example for char

data = 'h';

System.out.println(data);

}

}

output

h

Boolean:-

Boolean is used to define either true or false.

This group include only one data type boolean

Example:-

class group{

public static void main(String arg[]){

boolean data1,data2;

// example for boolean

data1 = true;

data2= false;

System.out.println("data1:"+data1);

System.out.println("data2:"+data2);

}

}

Output

data1:true

data2:false

Data type	Width	Range
long	64	-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
int	32	-2,147,483,648 to 2,147,483,647
short	16	-32,768 to 32,767
byte	8	-128 to 127
double	64	4.9e-324 to 1.8e+308
float	32	1.4e-045 to 3.4e+038
character	8	0 to 65,536
boolean	-	True or false

Note:-

# Number cannot convert from double to float, but float can be convert to double.

# Number cannot convert from long to int but int can be convert to long.

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