com.google.appinventor.components.runtime.collect

Class Sets

java.lang.Object

com.google.appinventor.components.runtime.collect.Sets

public class Sets
extends java.lang.Object

Provides static methods for creating mutable Set instances easily and other static methods for working with Sets. Note: This was copied from the com.google.android.collect.Lists class

Constructor Summary

Constructors

Constructor and Description
Sets()

Method Summary

Methods

Modifier and Type	Method and Description
static <K> java.util.HashSet<K>	newHashSet() Creates an empty HashSet instance.
static <E> java.util.HashSet<E>	newHashSet(E... elements) Creates a HashSet instance containing the given elements.
static <E> java.util.SortedSet<E>	newSortedSet(E... elements) Creates a SortedSet instance containing the given elements.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Sets

public Sets()

Method Detail

newHashSet

public static <K> java.util.HashSet<K> newHashSet()

Creates an empty HashSet instance.

Note: if E is an Enum type, use EnumSet.noneOf(java.lang.Class<E>) instead.

Note: if you only need an immutable empty Set, use Collections.emptySet() instead.

Returns:

a newly-created, initially-empty HashSet

newHashSet

public static <E> java.util.HashSet<E> newHashSet(E... elements)

Creates a HashSet instance containing the given elements.

Note: due to a bug in javac 1.5.0_06, we cannot support the following:

Set<Base> set = Sets.newHashSet(sub1, sub2);

where sub1 and sub2 are references to subtypes of Base, not of Base itself. To get around this, you must use:

Set<Base> set = Sets.<Base>newHashSet(sub1, sub2);

Parameters:

elements - the elements that the set should contain

Returns:

a newly-created HashSet containing those elements (minus duplicates)

newSortedSet

public static <E> java.util.SortedSet<E> newSortedSet(E... elements)

Creates a SortedSet instance containing the given elements.

Parameters:

elements - the elements that the set should contain

Returns:

a newly-created SortedSet containing those elements (minus duplicates)