Fundamental '=' and '=='

[Ant_Magma]

	int i=5;
	int j=0;

	System.out.println("int i is: " +i);
	System.out.println("int j is: " +j);

	j=i;

	System.out.println("int j is: " +j);

Does the code j=i mean that the value of i is passed into j or the reference?

I'm always confused with pass by reference and value.

What is want to do is to pass the value 5 into j, yet when i code j==i and compile it, it says the line is not a statement. Can't compile..

[sjalle]

The value. Reference is for objects, ints are not objects.

j==i is not a statement its a boolean.

[Ant_Magma]

So == is only applicable when used with objects and boolean. With objects it is passed by reference, meaning both pointers would b actually pointing2 the same object..correct?

[sjalle]

== can be used for both object and non-oblects (int, double, float, boolean, char &
reference comparison).
j==i is a boolean expression. For comparing objects content java uses the
equals(Object ob) method as this language does not offer operator overloading.

The answer is yes, == used for objects will be true if the references are for the same
memory location.

[Ant_Magma]

how is j==i a boolean expression? j and i are already both declared as int, how is it boolean?

[deroga]

j==i is boolean in the sense of:

if (j==i){ do stuff }

if j = 5 and i = 4 then do stuff would not happen
if j = 5 and i = 5 then do stuff would happen.

[Phaelax]

use "=" to assign a value to a variable. Use "==" when comparing two values.

j==i is saying that "does j equal i". The expression will either return TRUE or FALSE;

[Ant_Magma]

thx guys..i've got it...