Method signature that takes any parameter as input

How can I declare a method signature that takes Long, In开发者_如何学JAVAteger as input?

I tried following but it gives a compilation error:

List<Myobject> fun ( ? extends Number) value){
 //impl       

}

public <N extends Number>List<T>  xx(N a) {...}

This method takes any Number as input: private <N extends Number> void foo(N param) {}

This one also returns List of the same type

private <N extends Number> List<N> foo(N param) {}

Why not simply declare your argument as Number?

List<Myobject> fun (Number value){
 //impl       

}

<N extends Number> List<MyObject> fun(N value) { ... }

But in this use-case, I don't really see the benefit of using generics. I mean, why doesn't your method simply take a Number as argument ?

Simply

private <T extends Number> List<Myobject> fun(T value) {
    // do anything with the value
    return aMyobjectList;
}