Java String比较数组问题

Question

我在代码的最后阶段遇到问题，我想将输入的答案与用户存储的答案进行比较。用例是这样的。用户应输入一个带有正确答案的问题。然后，另一个用户（在这种情况下是相同的）应该能够阅读问题并提供答案。如果答案匹配，则过程完成，然后继续下一个问题。

当我比较答案时，它似乎一直工作到最后。当我调试用例时，它的读取值具有相同的值。

抱歉，很长的代码段

public static Scanner input = new Scanner(System.in);
public static ArrayList<String> questions = new ArrayList();
public static ArrayList<String> answers = new ArrayList();

public static void main(String[] args) {
    start();
}

public static void start(){
    System.out.println("---------------------------------------------");
    System.out.println("--       !Hello and welcome to date!       --");
    System.out.println("--                                         --");
    System.out.println("--              1.  Question               --");
    System.out.println("--              2.  Answer                 --");
    System.out.println("--                                         --");
    System.out.println("--                                         --");
    System.out.println("---------------------------------------------");

    int choice = input.nextInt();
    switch (choice){
        case 1: question();
            break;
        case 2: answer();
            break;
    }
}

public static void question(){
    System.out.println("---------------------------------------------");
    System.out.println("--                !Question!               --");
    System.out.println("--                                         --");
    System.out.println("--          1.  Add question               --");
    System.out.println("--          2.  Read questions             --");
    System.out.println("--          3.  Amount of questions        --");
    System.out.println("--                                         --");
    System.out.println("--          5.  Go back                    --");
    System.out.println("---------------------------------------------");

    int choice = input.nextInt();
    input.nextLine();
    switch (choice){
        case 1:
            System.out.println("Type your question here!");
            questions.add(input.nextLine());
            System.out.println("What is the answer to the question?");
            answers.add(input.nextLine());
            question();
            break;
        case 2:
            System.out.println(questions);
            question();
            break;
        case 3:
            System.out.println(questions.size());
            question();
            break;
        case 5:
            start();
            break;
        default:
            question();
            break;
    }
}
public static void answer(){
    System.out.println("---------------------------------------------");
    System.out.println("--                 !Answer!                --");
    System.out.println("--                                         --");
    System.out.println("--               1.  Answer                --");
    System.out.println("--                                         --");
    System.out.println("--               5.  Go back               --");
    System.out.println("---------------------------------------------");

    int choice = input.nextInt();
    input.nextLine();
    switch (choice) {
        case 1:
            System.out.println(questions.get(0));
            compare(input.nextLine());
            break;
        case 5:
            start();
            break;
        default:
            question();
            break;
    }
}
private static void compare(String answer){
    String array[] = new String[answers.size()];
    for(int j =0;j<answers.size();j++){
        array[j] = answers.get(j);
    }
    String compare = array[0].toString();
    if(answer == compare){
        System.out.println("Correct answer!");
        questions.remove(0);
        answers.remove(0);
    } else{
        System.out.println("Answer isn't correct!");
        answer();
    }
}