Example usage for java.util HashSet HashSet

Introduction

In this page you can find the example usage for java.util HashSet HashSet.

Prototype

public HashSet(int initialCapacity)

Source Link

Document

Constructs a new, empty set; the backing HashMap instance has the specified initial capacity and default load factor (0.75).

Usage

From source file:Main.java

@SafeVarargs
public static boolean equalsSize(List<? extends Object>... lists) {
    Set<Integer> sizes = new HashSet<Integer>(lists.length);
    for (List<? extends Object> list : lists) {
        if (list == null) {
            return false;
        }//from  w ww  . j  a  va2  s . co  m
        if (sizes.isEmpty()) {
            sizes.add(list.size());
        } else {
            if (sizes.add(list.size())) {
                return false;
            }
        }
    }
    return true;
}

From source file:Main.java

public static Set<String> asSet(String... strs) {
    return new HashSet<String>(Arrays.asList(strs));
}

From source file:Main.java

public static Set<String> loadSet(SharedPreferences prefs, String setName) {
    final int size = prefs.getInt(setName + "_size", 0);
    Set<String> set = new HashSet<String>(size);
    for (int i = 0; i < size; i++)
        set.add(prefs.getString(setName + "_" + i, null));
    return set;//  w w w  .j  ava2  s.c o m
}

From source file:Main.java

final static public Set<Object> synchronizedSet() {
    return Collections.synchronizedSet(new HashSet<Object>(INITIAL_CAPACITY));
}

From source file:Main.java

public static <T> Set<T> getReunionValues(Collection<? extends T> collectionA,
        Collection<? extends T> collectionB) {
    Set<T> newSet = new HashSet<T>(collectionA);
    newSet.addAll(collectionB);/* w  ww  . ja v  a 2s.c  om*/
    return newSet;
}

From source file:Main.java

public static <T> List<T> distinct(Collection<T> in) {
    if (in == null) {
        return new ArrayList<T>();
    }/*from   w  ww. ja va 2 s  .c  om*/
    return new ArrayList<T>(new HashSet<T>(in));
}

From source file:Main.java

/**
 * Interim method to get this code to compile against the 1.0-RC1 engine
 * @param key//from  w ww  .  j a va  2  s  .  c o  m
 * @param list
 * @return
 */
public static Set getSetFromList(List list) {
    return new HashSet(list);
}

From source file:Main.java

public static boolean collectionsMatch(Collection<?> coll1, Collection<?> coll2) {
    if (coll1 == null && coll2 == null) {
        return true;
    } else if (coll1 != null && coll2 != null) {
        return new HashSet<>(coll1).equals(new HashSet<>(coll2));
    } else {/*from ww w  .  j ava  2 s  .c o  m*/
        return false;
    }
}

From source file:Main.java

@SuppressWarnings({ "rawtypes", "unchecked" })
public static Collection removeDuplicates(Collection collection) {
    if (collection == null)
        return collection;
    Set duplicatesRemoved = new HashSet(collection);
    return duplicatesRemoved;
}

From source file:Main.java

@SuppressWarnings({ "rawtypes", "unchecked" })
public static boolean containsOnly(Collection collection, Object object) {
    if (collection == null)
        return false;
    Set duplicatesRemoved = new HashSet(collection);
    return duplicatesRemoved.size() == 1 && duplicatesRemoved.contains(object);
}