java - 如果用户输入在 Java 中按时间顺序排列，如何迭代数组

Question

我需要一点帮助，我有以下代码:

Scanner s = new Scanner(System.in);
String userinput= s.nextLine();
String[] books = new String[10];
books[0] = "book1”;
    books[1] = "book2";
if (Arrays.asList(userinput).contains(books[0])) {
    System.out.println("right, what is the next book?");
}
else {
    System.out.println("false");
}

我的目标是迭代数组并询问用户下一个输入，因此如果他写“book1”，我想自动询问“下一本书是什么？”我会等待他的答案是“book2”，依此类推，按时间顺序依次是 book3、4、5...。如果他在我期待“book2”时写了“book5”，那么一切都会重新开始，直到他按时间顺序写对为止

Answer 1

尝试阅读 3 本书。

String[] books = new String[3];
books[0] = "book1";
books[1] = "book2";
books[2] = "book3";
boolean flag = true;
while(flag){ //outer loop 
    int counter = 0; //check for total right answers
    for(int i=0;i<books.length;i++){ //iterate over all books
        System.out.print("Choose book " + (i+1) +" name: ");
        String userinput= s.nextLine();

        if (Arrays.asList(userinput).contains(books[i])) {
            counter++;
            System.out.println("right, what is the next book?");


            if(counter == books.length){ //in case all choices are correct
                flag = false;
            }
        } else {
            System.out.println("Wrong");
            break;//terminate inner loop
        }
    }
}