如何从内部类引用封闭类?

问题描述

我正在扩展 ArrayList 以创建一个自定义 ArrayList，可以在对其进行迭代时使用普通的 ArrayList 方法对其进行修改.为此，我还创建了一个迭代器.

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 hasNext() 和 next() 方法中，我需要确保列表没有被修改(可以在任何其他时间修改).因此我需要在我的 synchronized() 块中引用我的封闭类型.

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

EnclosureType.this.所以在你的情况下，它将是 SynchronizedList.this.

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

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