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Thread: Assignment Problem. Please help

  1. #26
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    Default Re: Assignment Problem. Please help

    Quote Originally Posted by melki0795 View Post
    i think by listing them down as 1 condition would be unprofessional.
    Not so. Code readability is important but clarity != short.

    Quote Originally Posted by melki0795 View Post
    if (!Selection.equals("A") & !Selection.equals("B") & !Selection.equals("C")){
    Once again you are trying to use bitwise & for a logical statement. Please see Learning the Java Language > Language Basics > Operators. Logical AND is two ampersands '&&' and is used to join two conditions together. Bitwise AND is one apersand '&' and it performs an AND on the individual bits in the variable. Bitwise AND has no place in a conditional unless you are bit twiddling.

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    Default Re: Assignment Problem. Please help

    Quote Originally Posted by melki0795 View Post
    i think that listing a statement something like that all the way to F would be messy....
    Here's a hint to an easier way:
    char first = 'b';
    char second = 'z';
    System.out.println(first >= 'a' && first <= 'c');
    System.out.println(second >= 'a' && second <= 'c');


    --- Update ---

    Quote Originally Posted by ChristopherLowe View Post
    Once again you are trying to use bitwise & for a logical statement.
    Actually using a single ampersand is fine as long as you know the consequences. Run the following code.
    class BooleanTest {
        private boolean methodOne() {
            System.out.println("Method one");
            return false;
        }
     
        private boolean methodTwo() {
            System.out.println("Method two");
            return false;
        }
     
        public void run() {
            if(methodOne() && methodTwo()) {
                System.out.println("Foo");
            }
            System.out.println();
            if(methodOne() & methodTwo()) {
                System.out.println("Foo");
            }
        }
     
        public static void main(String[] args) {
            new BooleanTest().run();
        }
    }
    Improving the world one idiot at a time!

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