difference between instance variable and simple variable

[Tomendra Singh]

hi all,
i am little bit confused that difference between instance variable and simple variable.
if it is then please give me some examples.

thank you.

[Ravikanth kolli]

I have never heard anything like a simple variable?
do you mean local variable?

[Tomendra Singh]

sorry i should say simply a variable.i mean when we declare any variable as we declare in general case like:-
int a;

[Henry Wong]

Originally posted by tomendra singh:
sorry i should say simply a variable.i mean when we declare any variable as we declare in general case like:-
int a;

The difference between an instance variable and a "local" variable, is merely the scope. As long as the variable is in scope, there should be no difference in how they are used.

Henry

[Tomendra Singh]

thank you wong, but can you tell me please scope of both type of variables and how they are declared differently so that i can easily recognize that which one is instance variable and which one is instance variable.

(please explain with an example.)

[fred rosenberger]

public class Myclass{
 
  int b; //this is a member variable, and exists as long as the object does
 
  public static methodOne()
  {
    int c = 0;//this is a method variable, and exists only for the duration
              //of this method.  
  }
  
  public static methodTwo()
  {
    b = 7;//legal, as 'b' belongs to the object
    c = 5;//not legal - 'c' disappears if we're not in the methodOne method
  }
 
}

[Tomendra Singh]

thank you very very much fred.