Java variable is nothing but a named memory allocation which may vary at the time of execution.A variable assigns a value.

For example, int x=20;
Here x is a variable and the value 20 is assigned to x which is also known as variable initialization.

Basically Java supports three types of variables, such as :

1. Local variable
2. Instance variable
3. Static variable

Local Variable:

A variable that is declared inside the method is called local variable.

Instance Variable:

A variable that is declared inside the class but outside the method is called instance variable .

Static Variable:

A variable that is declared by the keyword static is called static variable. It cannot be local.

Example

class Demo
{
   	int x=30;      //instance variable
   	int y=200;     //static variable
   	void get()
   	{
	  	int z=50;    //local variable
   `}
}