Re: Xlint " warning: [unchecked] unchecked conversion"

Lew <>
Fri, 24 Jul 2009 09:30:09 -0700 (PDT)
On Jul 24, 12:05 pm, "Donkey Hottie" <> wrote:

"RVic" <> wrote in message

Yes, that works, but what then about:

Hashtable getHashtable() {
   return this.hashtable;
public static void main(String[] args) throws Exception {
   Hashtable <String, Vector<String>> ht =
   MyClass.getHashtable(); .

How do I eliminate the "warning: [unchecked] unchecked
conversion" warning for that line in main()? i.e. how do
I put the notation <String, Vector<String>> to the rigth
of the equals sign?

You re-decrade all definitions again.

Hashtable<String, Vector<String, Vector<String>> getHashtable() {
   return this.hashtable;


Even better, rename 'this.hashtable' and define as the interface

public class Foo
  private final Map <String, List <String>> table =
    new HashMap <String, List <String>> ();
    // or Hashtable, ConcurrentHashMap, ...

  public final Map <String, List <String>> getTable()
    return this.table;

You can even make the class generic:

public class Foo <K, T>
  private final Map <K, List <T>> table =
    new HashMap <K, List <T>> ();
    // or Hashtable, ConcurrentHashMap, TreeMap, ...
    // but not Hashtable

  public final Map <K, List <T>> getTable()
    return this.table;


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