如何指从内部类封闭类？ [英] How to refer to Enclosing class from Inner class?

问题描述

我的ArrayList扩展创建一个自定义的ArrayList一个可以使用正常的ArrayList方法在遍历它进行修改。对于这个我也创建一个Iterator。

I am extending ArrayList to create a custom ArrayList that can be modified using normal ArrayList methods while iterating over it. For this I am also creating an Iterator.

public class SynchronizedList<E> extends ArrayList<E>
{
    // Fields here

    //Constructors and methods here

public class SynchronizedListIterator<E> implements Iterator<E>
{
    public int index;
    private E current;

    public boolean hasNext()
    {
        synchronized (/* reference to enclosing List object */) {
                    //code goes here
        }
        return false;
    }

    //more methods here
}
}

在我的规则hasNext（）和next（）方法，我需要确保该列表不会被修改（也可以在其他任何时间修改）。因此，我需要参考我的封闭类型在我同步（）块。

During my hasNext() and next() methods, I need to make sure the list is not modified (it can be modified at any other time). Hence I need to refer to my enclosing type in my synchronized() block.

推荐答案

EnclosingType.this 。所以你的情况，这将是 SynchronizedList.this 。

EnclosingType.this. So in your case, it would be SynchronizedList.this.

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