What is Java Variable and Datatypes

Variable is memory location name to be allocated.There are three types of variables in java:

Java Variable Types

local variable

instance variable

static variable

Local variables are declared in method, constructor, or block.

Instance variables declared inside class, but declared outside a method.

static variables declared using static keyword in a class,

class A{  
int data=50;//instance variable  
static int m=100;//static variable  
void method(){  
int n=90;//local variable  
}  
}

int(Data type) a,b,c;

float(Data type) pi;

double(Data type) d;

char(Data type) a;