java classname.this means 意思是

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可以参照一下：http://72.5.124.102/thread.jspa?messageID=10032401

public class ButtonTabComponent extends JPanel {
...
   public ButtonTabComponent(final JTabbedPane pane) {
      ...
      int i = pane.indexOfTabComponent(ButtonTabComponent.this);
      ...
   }
...
}

It's a reference to the ButtonTabComponent instance. It's identical to
only using this in this case. It's normally only used within nested /
inner classes that wants to get a reference to the outer class.

就是说，classname.this表示引用一个classname的实例，通常在nested、inner类里面使用，以达到引用其outer类的目的

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