如何将我在选项 1 和 2 中的输入打印到选项 3？这是我的代码

Question

我想在选项 3 中打印选项 1 和 2 的输入。我有一个菜单设置，用户选择他们想要的数字，然后在他们选择哪个团队之后有后续问题。    if (choys == 1)    {        ch = new Scanner(System.in);        System.out.println("Enter name: ");        userBName = ch.nextLine();        System.out.println("Enter age: ");        userBAge = ch.nextInt();        if(userBAge >=18 && userBAge <=21)        {            System.out.println("Congrats "+userBName+"! Welcome to the team.");            bslot++;        }        else        {            System.out.println("Sorry "+userBName+". You are not qualified.");        }    }    if (choys == 2)    {        System.out.println("Enter name: ");        userVName = ch.nextLine();        System.out.println("Enter age: ");        userVAge = ch.nextInt();        if(userVAge >=18 && userVAge <=21)        {            System.out.println("Congrats "+userVName+"! Welcome to the team.");            vslot++;        }        else        {            System.out.println("Sorry "+userVName+". You are not qualified.");        }    }    if (choys == 3)    {        System.out.println("Current number of recruits:\n");        System.out.println("Basketball team: "+ userBName+"\n\n");        System.out.println("Volleyball team: "+ userVName);    }    }

Answer 1

我们可以使用 2 个不同的 ArrayList 来存储选项 1 和 2 中的用户名。然后在选项 3 中打印相同的 ArrayList。

List<String> vNames = new ArrayList();

List<String> bNames = new ArrayList();

if (choys == 1)

{

    ch = new Scanner(System.in);

    System.out.println("Enter name: ");

    userBName = ch.nextLine();

    System.out.println("Enter age: ");

    userBAge = ch.nextInt();

    if(userBAge >=18 && userBAge <=21)

    {

        System.out.println("Congrats "+userBName+"! Welcome to the team.");

        bslot++;

        bNames.add(userBName);

    }

 }

if (choys == 2)

{

    ch = new Scanner(System.in);

    System.out.println("Enter name: ");

    userVName = ch.nextLine();

    System.out.println("Enter age: ");

    userVAge = ch.nextInt();

    if(userVAge >=18 && userVAge <=21)

    {

        System.out.println("Congrats "+userVName+"! Welcome to the team.");

        vSlot++;

        vNames.add(userVName);

    }

 }

 if (choys == 3)

{

    System.out.println("Current number of recruits:\n");

    System.out.println("Basketball team: ");

    for(String name:bNames){

        System.out.println("Username : "+ name);

    }

}

Answer 2

我曾尝试通过使用 while 循环让 vNames 和 bNames 留在 ArrayList 中来扩展@Shashank 的代码。

        Scanner ch = new Scanner(System.in);

        List<String> vNames = new ArrayList<String>();

        List<String> bNames = new ArrayList<String>();

        int choys;

        int bslot = 0, vslot = 0;

        Boolean run = true;

        while (run) {

            System.out.println("Enter Choice");

            choys = Integer.parseInt(ch.next());

            if (choys == 1) {

                System.out.println("Enter name: ");

                String userBName = ch.next();

                System.out.println("Enter age: ");

                int userBAge = Integer.parseInt(ch.next());

                if (userBAge >= 18 && userBAge <= 21) {

                    System.out.println("Congrats " + userBName

                            + "! Welcome to the team.");

                    bslot++;

                    bNames.add(userBName);

                }

            }else if (choys == 2) {

                ch = new Scanner(System.in);

                System.out.println("Enter name: ");

                String userVName = ch.next();

                System.out.println("Enter age: ");

                int userVAge = Integer.parseInt(ch.next());

                if (userVAge >= 18 && userVAge <= 21) {

                    System.out.println("Congrats " + userVName

                            + "! Welcome to the team.");

                    vslot++;

                    vNames.add(userVName);

                }

            } else if (choys == 3) {

                System.out.println("Current number of recruits:\n");

                System.out.println("Basketball team: ");

                for (String name : bNames) {

                    System.out.println("Username : " + name);

                }

                System.out.println("Volleyball team: ");

                for (String name : vNames) {

                    System.out.println("Username : " + name);

                }

            } else {

                run = false;

            }

        }

        System.out.println("Program Ended");