Java – how to write a method that accepts stacks and queues?

So I wrote this very big method If you give it a stack, it will return a stack If you give it a queue, it will return a queue It uses a lot of recursion and accepts the queue / stack and returns the corresponding same queue / stack

I don't want to copy / paste my method, so I can change the type used internally, so what method can make this general? In, will it accept any old collection and play with it? I tried to use collection, but the problem was that it didn't Remove() I can use stack / queue

Any help would be appreciated

thank you.

Solution

You can use collection, but there are special cases around your deletion Of course, when you get a series that is not one of the two, you have to figure out what to do

if (myCollection instanceof Queue) {
    ((Queue)myCollection).remove();
} else if (myCollection instanceof Stack) {
    ((Stack)myCollection).remove(thingy);
} else {
    // Oops! Now what?
}