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Thread: Trying to compare the values of 2 array indexes.

  1. #1
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    Default Trying to compare the values of 2 array indexes.

    I am trying to make a trivia game program for my Java class at school. I am new to Java and I'm trying to compare the string value of an index in one array (player's answers) against the string value of an index in another array(answer key) but I have no idea what expression to use to do this.


    public static int player1_answer_check(String player1_answers) {
     
    		int player1_correct, index = 0, counter = 0;
     
    		do {
    			if (player1_answers[index].equals(Question.get_answer_key(counter))) {
    				player1_correct++;
    			}
    			else{
    			}
    			index++;
    			counter = counter + 2;		
    		}
    		while (counter < 10);
     
    		return player1_correct;
    	}

  2. #2
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    Default Re: Trying to compare the values of 2 array indexes.

    To access an element in an array, use array notation. For a single dimension array: theArrayName[theIndex]
    I see that your code already uses array notation.

    An if statement could be used to compare two array elements.
    The current code uses an if statement.

    If the arrays hold objects, then use the equals method to compare.
    Again I see that your code already uses the equals method.


    Can you give some more details about your problem? Why doesn't the current code do what you want?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Trying to compare the values of 2 array indexes.

    I'm using eclipse an it is showing me an error saying "The type of the expression must be an array type but it resolved to a string" when I hover over player1_answers[index].

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    Default Re: Trying to compare the values of 2 array indexes.

    type of the expression must be an array type but it resolved to a string" when I hover over player1_answers[index].
    The variable: player1_answers is NOT defined as an array. Therefore the compiler will not allow array notation: [theIndex] to be used with it.
    player1_answers[index] The red part is not allowed for non-array variables.

    Where are the arrays you are talking about?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Trying to compare the values of 2 array indexes.

    I figured it out, I didn't put the [] after the String with my argument.

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