父类中的Java内联类调用方法 [英] Java inline class calling method in parent class

问题描述

我正在开发一个Swing小应用程序，需要一些帮助.我有一个用于MouseListener的内联类，并且在一个我想在父类中调用方法的方法中，但是，this是MouseListener的一个实例.

I'm working on a little Swing application and am in need of some assistance. I have an inline class for a MouseListener and inside one of the methods I would like to call a method in the parent class, however, this is an instance of the MouseListener.

class ParentClass
{
    void ParentMethod()
    {
        //...
        swing_obj.addMouseListener(
            new MouseListener()
            {
                public void mouseClicked(MouseEvent e)
                {
                    //Want to call this.methodX("str"), but
                    //this is the instance of MouseListener
                }
                public void mouseEntered(MouseEvent e){ }
                public void mouseExited(MouseEvent e){ }
                public void mousePressed(MouseEvent e){ }
                public void mouseReleased(MouseEvent e){ }
            }
        );
        //...
    }
    void methodX(String x)
    {
        //...
    }
}

任何帮助将不胜感激.

推荐答案

即使this是匿名类型的实例，您仍然应该能够调用methodX("str")-只是不要给它加上.

Even though this is an instance of the anonymous type, you should still be able to call methodX("str") - just don't prefix it with this.

如果您想露骨，我认为是一些语法可以使您做到这一点-您可以编写

If you want to be explicit, I think there is some syntax which lets you do it - you can write

ParentClass.this.methodX("str");

但就我个人而言，除非您确实需要(例如，消除对MouseListener中的方法的调用的歧义)，否则我不会打扰您.

but personally I wouldn't bother being explicit unless you really have to (e.g. to disambiguate the call from a method in MouseListener).

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