Pass a single element to a method that accepts a collection

Question

There is a method that accepts a collection. I need to pass one element to this method. What is the best way to do this? Which collection implementation should be used?

Answer 1

java.util.Collections.singleton()

Answer 2

As I understand it, you have this way:

 public void someMethod(Collection c) 

and you need to pass one element to it (e.g. MyObject).

There are two options here:

• Create a list, add MyObject to it, and then pass the List to method.

• Use polymorphism if possible! - Create a new method with the MyObject parameter as:

  public void someMethod (MyObject obj);