我正在尝试将ArrayList公开(在Java中)，以便可以在其他类中访问它，我在做什么错呢? [英] I'm trying to make an ArrayList public(in java) so I can access it in a different class, what am I doing wrong?

问题描述

出现错误，我不确定在不访问另一个类中的ArrayList时应该怎么做

There is an error and I'm not sure what I'm supposed to do without being unable to access the ArrayList in another class

package LifeGame;
import java.util.ArrayList;
public class Lists {

    public static void main(String[] args) {
    public ArrayList<String> tasks = new ArrayList<String>(); { // error on `tasks`
        tasks.add("Phone");
    }

    }
}

推荐答案

方法内的变量只能通过名称从同一方法内访问.类成员(在方法之外定义的变量)是唯一可以公开，私有等的成员.

Variables inside a method are only accessible by name from inside that same method. Class members — variable defined outside of methods — are the only ones that can be public, private, etc.

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