如何在Java *初学者程序员*中循环回到主菜单？

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        boolean exit = false;

        while (!exit) {
            System.out.println("主菜单");
            System.out.println("1. 选项一");
            System.out.println("2. 选项二");
            System.out.println("3. 退出");

            System.out.print("请输入选项：");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.println("执行选项一");
                    break;
                case 2:
                    System.out.println("执行选项二");
                    break;
                case 3:
                    exit = true;
                    break;
                default:
                    System.out.println("无效选项");
                    break;
            }
        }
    }
}

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        boolean exit;

        do {
            System.out.println("主菜单");
            System.out.println("1. 选项一");
            System.out.println("2. 选项二");
            System.out.println("3. 退出");

            System.out.print("请输入选项：");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.println("执行选项一");
                    break;
                case 2:
                    System.out.println("执行选项二");
                    break;
                case 3:
                    exit = true;
                    break;
                default:
                    System.out.println("无效选项");
                    break;
            }
        } while (!exit);
    }
}

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        for (;;) {
            System.out.println("主菜单");
            System.out.println("1. 选项一");
            System.out.println("2. 选项二");
            System.out.println("3. 退出");

            System.out.print("请输入选项：");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.println("执行选项一");
                    break;
                case 2:
                    System.out.println("执行选项二");
                    break;
                case 3:
                    return;
                default:
                    System.out.println("无效选项");
                    break;
            }
        }
    }
}