在 Java 中访问静态字段的正确方法是什么? [英] What is the proper way of accessing static fields in Java?

问题描述

我刚开始学习 Java，我写了一个类来使用静态字段进行测试.一切正常，但在 Eclipse 中，我看到一个图标，当悬停时显示为:CarCounter 类型的静态方法 getCounter 应该以静态方式访问."那么正确的方法是什么?

I just started learning Java and I wrote a class to test using static fields. Everything works fine but in Eclipse I see an icon which when hovered comes out as: "The static method getCounter from the type CarCounter should be accessed in a static way." What's the right way then?

这是课程:

public class CarCounter {
    static int counter = 0;

    public CarCounter(){
        counter++;
    }

    public static int getCounter(){
        return counter;
    }
}

这里是我尝试访问变量计数器的地方:

And here's where I try to access variable counter:

public class CarCounterTest {
    public static void main( String args[] ){
        CarCounter a = new CarCounter();
        System.out.println(a.getCounter()); //This is where the icon is marked
    }
}

推荐答案

静态字段和方法不属于特定对象，而是属于一个类，因此您应该从类而不是从对象访问它们:

Static fields and methods are not belong to a specific object, but to a class, so you should access them from the class, and not from an object:

CarCounter.getCounter()

而不是

a.getCounter()

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