doubt in access specifier

> Final variables are set when the app is launching

> regardless of where they are. Static variables are

> variables that will remain constant through all

> instances of that class.

This is totally wrong.

final variables can only be set once.

static variables are not "constant" and they operate on the class not instances.

cotton.ma at 2007-7-12 19:09:35 >

> > Final variables are set when the app is launching

> > regardless of where they are. Static variables

> are

> > variables that will remain constant through all

> > instances of that class.

>

> This is totally wrong.

>

> final variables can only be set once.

>

> static variables are not "constant" and they operate

> on the class not instances.

This is not totally wrong, by being set when the application launches they can not be changed. With statics if you were to have something like this:

public class Main {

/** Creates a new instance of Main */

public Main() {

Fu a = new Fu();

a.add();

a.print();

Fu b = new Fu();

b.print();

b.add();

b.add();

a.print();

b.print();

}

/**

* @param args the command line arguments

*/

public static void main(String[] args) {

new Main();

}

}

public class Fu {

private static int var = 0;

/** Creates a new instance of Fu */

public Fu() {

}

public void add() {

var++;

}

public void print() {

System.out.println(var);

}

}

This would print:

1

1

3

3

Showing that static is consistant across instances of the class.

drawimagea at 2007-7-12 19:09:35 >

I was always under the impression that Final variables were set when the app launches setting them into stone so you couldn't change them at runtime. With the statics, I am just not great at wording things.

cotton.m, if someone is wrong about something, maybe you should explain why they are wrong instead of just saying wrong, you don't answer anyone's questions when you just say, "YOU'RE WRONG."

drawimagea at 2007-7-12 19:09:35 >

You are correct in that final variables cannot be changed but the below code is legal.

class Foo {

final int value; // has no value

Foo() {

value = 10; // when does this happen? Not when the app launches for sure.

}

}

floundera at 2007-7-12 19:09:35 >