...
Do not introduce ambiguity while overloading (see MET50-JG. Avoid ambiguous uses of overloading), and use overloaded methods sparingly [Tutorials 20102008], because they can make code much less readable.
...
| Code Block | ||
|---|---|---|
| ||
class Overloader {
public class Overloader {
private static String display(List<?> list) {
return (
list instanceof ArrayList ? "Arraylist" :
(list instanceof LinkedList ? "LinkedList" :
"List is not recognized")
);
}
public static void main(String[] args) {
// Single ArrayList
System.out.println(display(new ArrayList<Integer>()));
List<?>[] invokeAll = new List<?>[] {new ArrayList<Integer>(),
new LinkedList<String>(), new Vector<Integer>()};
for (List<?> list : invokeAll) {
System.out.println(display(list));
}
}
}
|
...
Applicability
Ambiguous uses of overloading can lead to unexpected results.
...
[API 2011] Interface Collection<E>
[Bloch 2008] Item 41: Use overloading judiciously
[Tutorials 20102008] Defining Methods
...