如何在循环中的一个字符串中存储多个字符串变量输入（JAVA）

Question

I am semi-beginner in java

This is my code

        while (true) {
        System.out.println("Choose the number");
        System.out.println("1");
        System.out.println("2");
        System.out.println("3");
        System.out.println("4 for Display summary and Exit");

        int cho = input.nextInt();

        System.out.println("Registration");

        System.out.println("Enter your full name (first and lastname)");
        String name = input.next();

        System.out.println("Enter your National ID");
        int id = input.nextInt();

        System.out.println("Enter your phone number");
        int phone = input.nextInt();

I made if statement for all the choices 1,2,3,4

And this is number 4 if statement

            else if (cho == 4) {
            System.out.println("Summary");
        }

I want in this loop if user Choice 4 in the main menu prints a summary of all registered users (name, phone, id) that choices 1,2,3, even if the user made more than one register, and then exits the program.

Answer 1

You should use a class like Person to store each person at each round of loop, like

class Person{
    String name;
    int id, phone;
    // Constructor with the 3 attributes
    // toString() method implemented
}

And when use ask for 4 print all the list

List<Person> peoples = new ArrayList<>()
while (true) {
    System.out.println("Choose the number\n1\n2\n3\n4 for Display summary and Exit");
    int cho = input.nextInt();

    System.out.println("Registration");

    System.out.println("Enter your full name (first and lastname)");
    String name = input.next();

    System.out.println("Enter your National ID");
    int id = input.nextInt();

    System.out.println("Enter your phone number");
    int phone = input.nextInt();

    Person p = new Person(name, id, phone);
    peoples.add(p)
    //...
    if( cho == 4){
        peoples.forEach(System.out::println);
        break;
    }
}