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Thread: Logical operators don't seem to work in a very basic class

  1. #1
    Junior Member
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    Jul 2012
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    Default Logical operators don't seem to work in a very basic class

    I'm starting out in Java

    I produced the following class to test switch and conditional operators:

    [highlight = Java]
    import java.util.Scanner;

    public class TestingSwitchThenConditionals {

    public static void main(String[] args) {

    Scanner input = new Scanner(System.in);

    System.out.println("Enter password ");

    String password = input.nextLine();

    switch (password)
    case "Paris" : System.out.println("Correct");
    System.out.println("you're in");

    case "London" : System.out.println("Almost");

    default: System.out.println("No entry!!!");


    for (double count = 1;count <=5; count++)
    System.out.printf("%25s to the power of %.0f = %.0f\n", count, count , Math.pow(count, count));
    if ((count>=2) && (password == "London") )
    System.out.printf("%s\n", password);

    When I use the && conditional it doesn't seem to 'work' in the sense that if I enter the password as London the contents of the if statement are ignored even when count is >=2

    When I use the ^ conditional & enter London as the password I was expecting the if statement to execute only if count = 1 i.e only 1 of the operands is true & the other false (I'm using Java, How to Program 9th ed, p 226 for definition of ^ which tells me that BOTH operands are evaluated)

    Any help would be greatly appreciated

  2. #2
    Super Moderator jps's Avatar
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    Jul 2012
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    Default Re: Logical operators don't seem to work in a very basic class

    Please see the announcements page for the use of code tags.

    After that have a look at the java api for the string class and see what it has to say about comparing string objects.

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