日期:2014-05-20  浏览次数:20693 次

100分求教:Form不能实现ItemStateListener??
有一个类,继承了Form,实现了CommandListener,   ItemStateListener,定义如下:
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public   class   TestUI   extends   Form   implements   CommandListener,ItemStateListener   {}
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但是,在覆写ItemStateListener的方法itemStateChanged(Item   item)的时候,Eclipse总是有一个警告:
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Multiple   markers   at   this   line
-   The   method   TestUI.itemStateChanged(Item)   does   not   override   the   inherited   method   from   Displayable   since   it   is   private   to   a   different   package.
-   implements   javax.microedition.lcdui.ItemStateListener.itemStateChanged
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如果是一个MIDlet,实现接口CommandListener,   ItemStateListener的时候不会出现上面这个警告。

哪位大虾指点指点这个警告是什么意思么?

------解决方案--------------------
反编译之后,发现Displayable类里有一个 void itemStateChanged(Item)方法
如果你再实现ItemStateListener接口,2个方法名重复了,会造成运行结果异常的
------解决方案--------------------
The method TestUI.itemStateChanged(Item) does not override the inherited method from Displayable since it is private to a different package.
很明显,私有的不同包的继承方法不能被覆写!