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

public static <T> Collection<T> union(Collection<T> col1, Collection<T> col2) {
    Set<T> set = new HashSet<T>(clone(col1));
    set.addAll(col2);/*  w w  w.j a  v a  2 s.com*/
    return set;
}

From source file:Main.java

public static <T> Set<T> set(T... items) {
    return new HashSet<T>(Arrays.asList(items));
}

From source file:Main.java

public static Set<Object> listToHashSet(List<?> list) {
    return new HashSet<>(list);
}

From source file:Main.java

public static boolean containSameItems(Collection c1, Collection c2) {
    Set s1 = (c1 instanceof Set) ? (Set) c1 : new HashSet(c1);
    Set s2 = (c2 instanceof Set) ? (Set) c2 : new HashSet(c2);
    return s1.equals(s2);
}

From source file:Main.java

@SafeVarargs
public static <T> Set<T> set(T... elements) {
    return new HashSet<T>(list(elements));
}

From source file:Main.java

public static <T> Set<T> union(Set<? extends T> a, Set<? extends T> b) {
    Set<T> result = new HashSet<T>(a);
    result.addAll(b);/* www . j  a v  a  2s  .c  om*/
    return result;
}

From source file:Main.java

public static Set toSet(Object[] someElements) {
    Set asSet = new HashSet(someElements.length);
    for (int i = 0; i < someElements.length; i++)
        asSet.add(someElements[i]);// w  w w  .j av  a2s. co m

    return asSet;
}

From source file:Main.java

public static double computeDice(Collection<String> c1, Collection<String> c2) {
    Set<String> intersection = new HashSet<>(c1);
    intersection.retainAll(c1);//  w  w w.  java 2s .com
    intersection.retainAll(c2);

    if (intersection.size() == 0)
        return 0.0;
    double score = 2 * (double) intersection.size() / (c1.size() + c2.size());
    return score;

}

From source file:Main.java

public static <T> Set<T> buildSet(T... ts) {
    Set<T> set = new HashSet<T>(ts.length * 2);
    addAll(set, ts);/*  w  w w .  j  a  v a2 s. co m*/
    return set;
}

From source file:Main.java

public static <T> boolean hasDuplicates(Collection<T> collection) {
    Set<T> set = new HashSet<T>(collection);
    return set.size() != collection.size();
}