“使用”不好吗；return"；逃避主要方法？

所以这可能是一个非常愚蠢的问题，但在你把这篇文章烧成灰烬之前，请听我说完XD。下面我写了三个基本类，它们都完成了相同的任务，但通过不同的方式：

A类（休息）

import java.util.Scanner;
public class ClassA
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        while(true)
        {
            System.out.print("Enter a sentence (/q to quit): ");
            String sentence = in.nextLine();

            if(sentence.equals("/q"))
                break;
            else
                System.out.println("Thank you!");
        }
    }
}

import java.util.Scanner;
public class ClassB
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        while(true)
        {
            System.out.print("Enter a sentence (/q to quit): ");
            String sentence = in.nextLine();

            if(sentence.equals("/q"))
                return;
            else
                System.out.println("Thank you!");
        }
    }
}

import java.util.Scanner;
public class ClassC
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        while(true)
        {
            System.out.print("Enter a sentence (/q to quit): ");
            String sentence = in.nextLine();

            if(sentence.equals("/q"))
                System.exit(0);
            else
                System.out.println("Thank you!");
        }
    }
}

B类（退货）

import java.util.Scanner;
public class ClassA
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        while(true)
        {
            System.out.print("Enter a sentence (/q to quit): ");
            String sentence = in.nextLine();

            if(sentence.equals("/q"))
                break;
            else
                System.out.println("Thank you!");
        }
    }
}

import java.util.Scanner;
public class ClassB
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        while(true)
        {
            System.out.print("Enter a sentence (/q to quit): ");
            String sentence = in.nextLine();

            if(sentence.equals("/q"))
                return;
            else
                System.out.println("Thank you!");
        }
    }
}

import java.util.Scanner;
public class ClassC
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        while(true)
        {
            System.out.print("Enter a sentence (/q to quit): ");
            String sentence = in.nextLine();

            if(sentence.equals("/q"))
                System.exit(0);
            else
                System.out.println("Thank you!");
        }
    }
}

C类（系统出口（0））-

import java.util.Scanner;
public class ClassA
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        while(true)
        {
            System.out.print("Enter a sentence (/q to quit): ");
            String sentence = in.nextLine();

            if(sentence.equals("/q"))
                break;
            else
                System.out.println("Thank you!");
        }
    }
}

import java.util.Scanner;
public class ClassB
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        while(true)
        {
            System.out.print("Enter a sentence (/q to quit): ");
            String sentence = in.nextLine();

            if(sentence.equals("/q"))
                return;
            else
                System.out.println("Thank you!");
        }
    }
}

import java.util.Scanner;
public class ClassC
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        while(true)
        {
            System.out.print("Enter a sentence (/q to quit): ");
            String sentence = in.nextLine();

            if(sentence.equals("/q"))
                System.exit(0);
            else
                System.out.println("Thank you!");
        }
    }
}

虽然我更喜欢A班和C班，B班有什么问题吗？更具体地说，使用

return

语句退出程序的

main

方法是否是一种不良做法？若然，原因为何

---

提前谢谢

使用

return

是正确的做法，因为它使

main

更易于测试——您的测试框架不需要拦截退出尝试