Question

I’ve got two arrays of question and answers

String questions[] = {
"Q1?",
"Q2?",
"Q3?"};

String answers[] = {
    "A1?",
    "A2?",
    "A3?"};

I used Collections.shuffle(Arrays.asList(questions); to shuffle each arrays. How do I shuffle each array so that after shuffling they maintain same order?

Answer 1

You can rather shuffle a new array which holds the indices. And then get the elements from both array from the first index.

List<Integer> indexArray = Arrays.asList(0, 1, 2);

Collections.shuffle(indexArray);

String question = questions[indexArray.get(0)];
String answer = answers[indexArray.get(0)];

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Of course, creating a class containing questions and answers would be a more OO way, as other answers suggest. That way, you would have to maintain just one List or array, as compared to 3 arrays in the current approach.