Java全局变量未在新类中更新 [英] Java global variables not updating in new class

问题描述

我目前正在编写一个简单的Android应用，该应用会询问用户一系列问题，然后告诉他们有多少正确的答案.我有一类具有全局变量(称为分数")的私有类，并且具有该方法的getter和setter方法.当用户获得正确答案时，该类中的分数将(本地)增加并从0更新为1.但是，当我尝试使用创建的getScore()方法访问另一个类中的score值时，它说scores值为0，而不是1. 例如

I am currently programming a simple Android app that asks the user a series of questions and then tells them how many they got correct. I have one class that has a global variable (called "score") that is private and I have getter and setter methods for it. When the user gets the answer correct, the score is incremented (locally) and updates from 0 to 1 in that class. However, when I try to use the getScore() method I have created, to access the value of score in another class, it says scores value is 0, and not 1. E.g.

    public ClassA {
        private int score =  0;

        public void setScore(int s) {
           this.score = s;
        }
        public int getScore() {
           return score;
        }
    }

    public ClassB {
        private ClassA eg = new ClassA();
        private int score = eg.getScore();
    }

我已经坚持了一段时间，但真的不知道为什么这不起作用. 非常感谢您的帮助. 谢谢.

I've been stuck on this for a while and really don't know why this isn't working. Help is much appreciated. Thanks.

推荐答案

设置得分，获得得分之前.

public ClassB {
        private ClassA eg = new ClassA();

        eg.setScore(5);
        private int score = eg.getScore();
        System.out.println(score);
    }

希望这会有所帮助.

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