Example usage for java.util Collections unmodifiableSet

Introduction

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

Prototype

public static <T> Set<T> unmodifiableSet(Set<? extends T> s)

Source Link

Document

Returns an unmodifiable view of the specified set.

Usage

From source file:MainClass.java

public static void main(String[] a) {
    Set s = new HashSet();
    s.add("A");/*from   ww  w.j  a  v  a2s .  com*/
    s.add("B");
    s.add("C");
    s.add("D");
    s.add("E");
    s.add("F");
    s.add("H");

    Collections.unmodifiableSet(s);

    s = Collections.unmodifiableSet(s);

    s.clear();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {

    List stuff = Arrays.asList(new String[] { "a", "b" });

    List list = new ArrayList(stuff);
    list = Collections.unmodifiableList(list);

    try {/*from w w  w .  j  ava2  s  .  co  m*/
        list.set(0, "new value");
    } catch (UnsupportedOperationException e) {

    }

    Set set = new HashSet(stuff);
    set = Collections.unmodifiableSet(set);

    Map map = new HashMap();
    map = Collections.unmodifiableMap(map);
}

From source file:Main.java

public static <K> Set<K> createUnmodifiableSet(Set<K> ks) {
    return Collections.unmodifiableSet(ks);
}

From source file:Main.java

public static <T> Set<T> unmodifiableSetOrNull(Set<? extends T> a_set)
/*     */ {//from  w w w  . j a  va2  s  .  co  m
    /* 286 */return a_set == null ? null : Collections.unmodifiableSet(a_set);
    /*     */}

From source file:Main.java

@SafeVarargs
public static <V> Set<V> unmodifiableSet(V... elements) {
    return Collections.unmodifiableSet(toSet(new HashSet<V>(), elements));
}

From source file:Main.java

public static <T> Set<T> unmodifiableSet(Set<? extends T> set) {
    if (set == null) {
        return Collections.emptySet();
    } else {/*w w  w .  j  a  va2s  . c o m*/
        return Collections.unmodifiableSet(set);
    }
}

From source file:Main.java

public static <T> Set<T> unmodifiableSet(Set<T> orig) {
    return Collections.unmodifiableSet(orig);
}

From source file:Main.java

public static <E> Set<E> union(final Set<E> set1, final Set<E> set2) {
    Set<E> set = new HashSet<>(set1);
    set.addAll(set2);/* ww w.j av a 2s.  co m*/
    return Collections.unmodifiableSet(set);
}

From source file:Main.java

public static <E> Set<E> toSet(Iterable<? extends E> iterable) {
    final Set<E> set = new HashSet<E>();

    for (E e : iterable) {
        set.add(e);//  ww w.j  av a  2  s.com
    }

    return Collections.unmodifiableSet(set);
}

From source file:Main.java

public static <E> Set<E> difference(final Set<E> set1, final Set<E> set2) {
    Set<E> set = new HashSet<>(set1);
    set.removeAll(set2);//from  w  ww .j a va2 s. co m
    return Collections.unmodifiableSet(set);
}