Merge change Ie70845ca into eclair-mr2

* changes:
  Add Sets#newSortedSet()
This commit is contained in:
Android (Google) Code Review
2009-12-07 14:41:49 -08:00

View File

@@ -44,41 +44,50 @@ public class Sets {
return new HashSet<K>();
}
/**
* Creates a {@code HashSet} instance containing the given elements.
*
* <p><b>Note:</b> due to a bug in javac 1.5.0_06, we cannot support the
* following:
*
* <p>{@code Set<Base> set = Sets.newHashSet(sub1, sub2);}
*
* <p>where {@code sub1} and {@code sub2} are references to subtypes of {@code
* Base}, not of {@code Base} itself. To get around this, you must use:
*
* <p>{@code Set<Base> set = Sets.<Base>newHashSet(sub1, sub2);}
*
* @param elements the elements that the set should contain
* @return a newly-created {@code HashSet} containing those elements (minus
* duplicates)
*/
public static <E> HashSet<E> newHashSet(E... elements) {
int capacity = elements.length * 4 / 3 + 1;
HashSet<E> set = new HashSet<E>(capacity);
Collections.addAll(set, elements);
return set;
}
/**
* Creates a {@code HashSet} instance containing the given elements.
*
* <p><b>Note:</b> due to a bug in javac 1.5.0_06, we cannot support the
* following:
*
* <p>{@code Set<Base> set = Sets.newHashSet(sub1, sub2);}
*
* <p>where {@code sub1} and {@code sub2} are references to subtypes of {@code
* Base}, not of {@code Base} itself. To get around this, you must use:
*
* <p>{@code Set<Base> set = Sets.<Base>newHashSet(sub1, sub2);}
*
* @param elements the elements that the set should contain
* @return a newly-created {@code HashSet} containing those elements (minus
* duplicates)
*/
public static <E> HashSet<E> newHashSet(E... elements) {
int capacity = elements.length * 4 / 3 + 1;
HashSet<E> set = new HashSet<E>(capacity);
Collections.addAll(set, elements);
return set;
}
/**
* Creates a {@code SortedSet} instance containing the given elements.
*
* @param elements the elements that the set should contain
* @return a newly-created {@code SortedSet} containing those elements (minus
* duplicates)
*/
public static <E> SortedSet<E> newSortedSet(E... elements) {
SortedSet<E> set = new TreeSet<E>();
Collections.addAll(set, elements);
return set;
}
/**
* Creates an empty {@code SortedSet} instance.
*
* @return a newly-created, initially-empty {@code SortedSet}.
*/
public static <E> SortedSet<E> newSortedSet() {
return new TreeSet<E>();
}
/**
* Creates a {@code SortedSet} instance containing the given elements.
*
* @param elements the elements that the set should contain
* @return a newly-created {@code SortedSet} containing those elements (minus
* duplicates)
*/
public static <E> SortedSet<E> newSortedSet(E... elements) {
SortedSet<E> set = new TreeSet<E>();
Collections.addAll(set, elements);
return set;
}
}