NegatedIfElse

Reports if statements that contain else branches and whose conditions are negated.

Flipping the order of the if and else branches usually increases the clarity of such statements.

There is a fix that inverts the current if statement.

Example:

void m(Object o1, Object o2) {
        if (o1 != o2) {
            System.out.println(1);
        }
        else {
            System.out.println(2);
        }
    }

After applying the quick-fix:

void m(Object o1, Object o2) {
        if (o1 == o2) {
            System.out.println(2);
        } else {
            System.out.println(1);
        }
    }

Use the Ignore '!= null' comparisons option to ignore comparisons of the != null form.

Use the Ignore '!= 0' comparisons option to ignore comparisons of the != 0 form.