Question

I want to receive a function in parameter and call it with one parameter as:

public static <T> T foo(Callable<T> func)
{
     return func.call("bar");
}

But it call doesn't take any parameter. Any idea on how can I do this?

No matter how much I search, I dont find anything that help me...

Answer 1

A Callable<T> only has one method: T call().

If you want something different, you will need to use a different parameter type, for example:

public interface CallableWithString<T> {
    T call(String arg); //Assuming you want a string argument
}

Then your function can do:

public static <T> T foo(CallableWithString<T> func) {
    return func.call("bar");
}