Variables in Java :-
In Programming a Variable is a Location capable of storing Temporary Data within a program. This data can be Modified, stored or display whenever needed. the size of the variable depends upon the range over which the variable is allow.A Variable Definition tells the compiler where and how much storage to create for the variable.
A Variable Definition specifies a datatype and contains a list of one or more of that type.
Syntax :- datatype variable_name
Types Of Variable :-
There are four type of Variables :-
- Local Variable.
- Instance Variable.
- Static Variable.
- Parameter Variable.
1)- Local Variable :-
A Variable that is declared inside the method is called Local Variable.
2)- Instance Variable or Global Variable :-
A Variable that is declare inside the class but outside the method is called Instance Variable or Global Variable.
3)- Static Variable :-
The Variable that is declare as static is called Static Variable.
4)- Parameter Variable :-
Parameter or Arguments are the Variables in Method Declaration.
Ex :-
class test
{
int a=5; //instance(global) Variable.
static int b=10; //static variable.
public void accept(string name) //string name is parameter variable
{
int age=18;//Local Variable
System.out.println("Your Name is:"+s );
System.out.println("Your Age is:"+age );
}
public static void main(String args[])
{
test t1=new test();
t1.accept("vishal");
System.out.println("a="+a+ "b="+b);
}
}
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