如何从主方法调用非静态方法? [英] How do I call a non static method from a main method?

问题描述

例如，我正在尝试做这样的事情

For example, I am trying to do something like this

public class Test {

    public static void main(String args[]) {

        int[] arr = new int[5];

        arrPrint(arr);
    }

    public void arrPrint(int[] arr) {

        for (int i = 0; i < arr.length; i++)
            System.out.println(arr[i]);

    }
}

我收到一条错误消息，告诉我我无法从静态环境中引用非静态变量.因此，如果这是真的，我将如何在 main 中使用非静态方法?

I get an error telling me that I can't reference non-static variables from static enviorments. So if that is true how would I ever utilize a non static method inside of a main?

推荐答案

你不能.非静态方法是必须在 Test 类的实例上调用的方法；创建一个 Test 实例以在您的主要方法中使用:

You can't. A non-static method is one that must be called on an instance of your Test class; create an instance of Test to play with in your main method:

public class Test {

    public static void main(String args[]) {
        int[] arr = new int[5];
        arr = new int[] { 1, 2, 3, 4, 5 };

        Test test = new Test();
        test.arrPrint(arr);

    }

    public void arrPrint(int[] arr) {
        for (int i = 0; i < arr.length; i++)
            System.out.println(arr[i]);

    }
}

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