Java 新手，想不出使用 while 循環來結束用戶輸入

Question

我是 Java 新手，我目前正在嘗試創建一個 while 循環，如果用戶輸入 Yes，它將循環。 我也希望它提示用戶輸入“endinput”，如果他們改為放置停止。 有任何想法嗎？ 剛剛開始 Java 編程，這讓我很難過，因為我不知道如何繼續。

public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    String[]
        title=new String[100],
        author=new String[100],
        publisher=new String[100],
        ISBN=new String[100],
        endinput=new String[100];
        boolean Stop = false;
        boolean Yes = true;
        double[] price=new double[100];

        System.out.println("Welcome To Kieran's Bookstore");

        System.out.println("Input The Title:");
        title[0] = scan.next(); 
        System.out.println("Input The Author:");
        author[0] = scan.next();
        System.out.println("Input The Price Of The Book:");
        scan.next();
        System.out.println("Input The Publisher:");
        publisher[0]= scan.next();
        System.out.println("Input The ISBN:");
        ISBN[0]=scan.next();
        System.out.println("Would you like to continue?(Yes/Stop)");
        scan.next();

        while(!Stop)
            {
            System.out.println("Input The Title:");
            title[0] = scan.next(); 
            System.out.println("Input The Author:");
            author[0] = scan.next();
            System.out.println("Input The Price Of The Book:");
            scan.next();
            System.out.println("Input The Publisher:");
            publisher[0]= scan.next();
            System.out.println("Input The ISBN:");
            ISBN[0]=scan.next();
            System.out.println("Would you like to continue?(Yes/Stop)");
            scan.equals(Stop);
        }
        while (!Stop) {System.out.println("Please Type 'endinput':");
          scan.next();
        }
        System.out.println("Please Type 'endinput':");
        scan.next();
        if (scan.equals("endinput"))System.exit(0);
        scan.close();

Answer 1

您只需要使用一段while即可實現這一目標。 為scan.next()分配一個變量並使用if進行檢查。

public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    String[] title = new String[100], author = new String[100], publisher = new String[100], ISBN = new String[100],
            endinput = new String[100];
    // boolean Stop = false;
    boolean Yes = true;
    double[] price = new double[100];

    while (Yes) {
        System.out.println("Welcome To Kieran's Bookstore");
        System.out.println("Input The Title:");
        title[0] = scan.next();
        System.out.println("Input The Author:");
        author[0] = scan.next();
        System.out.println("Input The Price Of The Book:");
        scan.next();
        System.out.println("Input The Publisher:");
        publisher[0] = scan.next();
        System.out.println("Input The ISBN:");
        ISBN[0] = scan.next();
        System.out.println("Would you like to continue?(Yes/Stop)");
        String ans = scan.next();
        if (ans.equals("endinput") || (ans.equals("Stop"))) {
            Yes = false;
            System.exit(0);
        }
    }
}