Java中的main方法可以返回一些东西吗？ [英] Can a main method in Java return something?

问题描述

我最近接受了一次采访，他们在核心Java中问我两个问题。

I went through an interview recently and they ask me two questions in core Java.

问题1。

我们可以编写一个java类：

Can we write a java class with:

public static int main(String[] args){
     System.out.println("Hello");

我回答：不。编译器不会将其编译为它期望 main 的返回类型为 int ，尽管我们可以重载它。

I answered: No. The compiler won't compile it as it is expecting the return type of main to be int, though we can overload it.

问题2：下一个我无法回答的问题。

Q 2: The next question I was unable to answer.

编写一个程序以便你的Java main 方法可以返回一些东西。

Write a program so that your Java main method could return something.

即怎么能让 public static void main（[] args）返回一些东西？

I.e. how can you make public static void main([] args) to return something?

任何人都可以帮我回答这个问题吗？

Can any body help me to answer this?

推荐答案

Q 1.我们可以写吗一个java类，包含：public static int main（String [] args）{

Q 1. Can we write a java class with : public static int main(String[] args){

是的，你可以但是你不能运行它Java类。

Yes, you can but you can't run that Java class.

示例类：

class MainTest {

        public static int main(String[] args) {
                return 1;
        }
}

尝试运行时会收到错误消息：

You will receive an error message when trying to run it:

Error: Main method must return a value of type void in class MainTest, please 
define the main method as:
   public static void main(String[] args)

问题2：下一个问题我无法回答。他要求写一个程序，所以
你的java主方法可以返回一些东西。

Q 2: Next question I unable to answer. He asked write a program so that your java main method could return something.

你可以使用 System＃exit（int）退出您的程序具有可由操作系统解释的特定退出代码。

You can use System#exit(int) to quit your program with a specific exit code which can be interpreted by the operating system.

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