difference between ifs

[Bruno Sant Ana]

Hi guys,

I don't understand what's the difference between the ifs bellow:

public class ClassWithIF {

    static public void main(String args[]) {
        int x = 1, y = 2;
        if ((x < 0 && y < 0) | true) {
            System.out.println("it passed here - if 1");
        }

        if (x < 0 && y < 0 | true) {
            System.out.println("it passed here - if 2");
        }
        
        if ((x < 0) && (y < 0) | true) {
            System.out.println("it passed here - if 3");
        }
        
        if ((x < 0) && (y < 0) || true) {
            System.out.println("it passed here - if 4");
        }
        
        if ((x < 0) && (y < 0) | (true)) {
            System.out.println("it passed here - if 5");
        }
        
        if ((x < 0) && (y < 0) || (true)) {
            System.out.println("it passed here - if 6");
        }
        
        if ((x < 0 && y < 0) | (true)) {
            System.out.println("it passed here - if 7");
        }
    }
}

Why is the output like that?
it passed here - if 1
it passed here - if 4
it passed here - if 6
it passed here - if 7

For example, I thought if3 and if4 are the same. I thought if5 and if6 are the same as well, but they are not. Is it has to do with precedence of operators? What's the role's brackets?

Thanks

[Campbell Ritchie]

Those statements are very different because the | operator has a higher precedence than && but || has a lower precedence than &&. No 3 and no 4 parse differently.
a && b | c means a && (b | c)
a && b || c means (a && b) || c

[Winston Gutkowski]

Bruno Sant Ana wrote:I don't understand what's the difference between the ifs bellow:

Your code looks remarkably similar to this Thread. Perhaps the discussion there might help.

Winston

[Bruno Sant Ana]

I just wanted to confirm if it's related to precedence of operators. I found an URL with this subject and I'll take a look at it and do some tests:

http://bmanolov.free.fr/javaoperators.php

If appears more doubts I'll post here.

Thank for while

[fred rosenberger]

it has to do with both the precedence of operators and the difference between "||" and "|".

[Campbell Ritchie]

That precedence table has two operators named incorrectly and one pair of operators in the wrong precedence level. You should ignore it.
The Java Tutorials has a table with the correct precedences, even though it calls && and || something different from here. “Conditional” is correct.