我用Oldphone继承抽象类Telphone为什么新建了Oldphone类就错误了。抽象类里有call,mess方法
- implements Telphone.call
- The method call() of type Oldphone must override or
implement a supertype method
我用Oldphone继承抽象类Telphone为什么新建了Oldphone类就错误了。抽象类里有call,mess方法
- implements Telphone.call
- The method call() of type Oldphone must override or
implement a supertype method
2014-10-13
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