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How to solve Java generics name clash , has the same erasure?

Anonymous User 4122 16-Oct-2014

I have superclass Foo. And a class Bar extending it.

public class Bar extends Foo

Function in Foo:

protected void saveAll(Collection<?> many)

Function in Bar:

public void saveAll(Collection<MyClass> stuff)
{
    super.saveAll(stuff);
}

Getting error :

Name clash: The method saveAll(Collection<MyClass>) of type Bar has the same erasure as saveAll(Collection<?>) of type Foo but does not override it.

java oops

Updated on 16-Oct-2014

I am a content writter !

Can you answer this question?

Answer

16-Oct-2014

You are overriding the saveAll method with an incompatible type. Perhaps you want to do something like:

public class Bar extends Foo<MyClass>
Function in Foo<E>
protected void saveAll(Collection<E> many)

and function in Bar:

public void saveAll(Collection<MyClass> stuff)
{
   super.saveAll(stuff);
}