Multiple markers at this line @Override的解决方法

Multiple markers at this line

- implements java.awt.event.ActionListener.actionPerformed

- The method actionPerformed(ActionEvent) of type DimmingGlassPane.Animator must override a 

superclass method

- Javadoc: Missing comment for private declaration

缘由：JDK1.5不支持这种写法。实现接口方法须要重写抽象方法。

解决方法：将Compiler compliance level修改成1.6便可.

此处可能须要在两个地方修改
 (1) Eclipse的Window-Preferences->Java->Compiler
(2)Eclipse的Project->Properties->Java Compiler