如何在非静态内部类的另一个实例中引用外部类？ [英] How to refer to the outer class in another instance of a non-static inner class?

问题描述

我正在使用Apache Commons EqualsBuilder为非静态Java内部类构建equals方法。例如：

I'm using the Apache Commons EqualsBuilder to build the equals method for a non-static Java inner class. For example:

import org.apache.commons.lang.builder.EqualsBuilder;

public class Foo {
    public class Bar {
        private Bar() {}

        public Foo getMyFoo() {
            return Foo.this
        }

        private int myInt = 0;

        public boolean equals(Object o) {
            if (o == null || o.getClass() != getClass) return false;

            Bar other = (Bar) o;
            return new EqualsBuilder()
                .append(getMyFoo(), other.getMyFoo())
                .append(myInt, other.myInt)
                .isEquals();
        }
    }

    public Bar createBar(...) {
        //sensible implementation
    }

    public Bar createOtherBar(...) {
        //another implementation
    }

    public boolean equals(Object o) {
        //sensible equals implementation
    }
}

是否有语法可以参考其他的 Foo 除了声明 getMyFoo（）方法之外？像 other.Foo.this （这不起作用）？

Is there syntax by which I can refer to other's Foo reference apart from declaring the getMyFoo() method? Something like other.Foo.this (which doesn't work)?

推荐答案

没有。

最好的方法可能就是你的建议：在你的内部类中添加一个getFoo（）方法。

The best way is probably what you suggested: add a getFoo() method to your inner class.

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