返回值是什么意思？ [英] What does it mean to return a value?

问题描述

我对编程很新，而且我对于返回一个值的确切含义感到困惑。起初，我认为这意味着要输出返回的值，但是当我在自己的代码中尝试时，没有任何反应。

I'm fairly new to programming, and I'm confused about what it means exactly to return a value. At first, I thought it meant to output what value is being returned, but when I tried that in my own code, nothing happened.

class Class1 {

    public static int x = 3;

    public static int getX(){
        return x;
    }

    public static void main(String[] args){
        Class1.getX();
    }
}

这是我的意思的一个例子。当我运行程序时，没有任何显示。考虑到这一点，我被引导相信返回一个值意味着别的东西。但是什么？

This is an example of what I mean. When I run the program, nothing shows up. Considering this, I'm led to believe returning a value means something else. But what?

推荐答案

简单来说，它意味着将值返回给方法的调用者......

In simple terms, it means to return the value to caller of the method...

因此，在您的示例中，方法 getX 将返回 x 给调用者，允许他们访问它。

So, in your example, the method getX would return the value of x to the caller, allowing them access to it.

class Class1{

    static int x = 3;

    public static int getX(){
        return x;
    }

    public static void main(String args[]){
        int myX = Class1.getX(); // return the value to the caller...
        System.out.println(myX); // print the result to the console...
    }
}

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