Java Set Create toSet(Iterable things)

Description

to Set

License

Apache License

Declaration

public static <T> Set<T> toSet(Iterable<? extends T> things) 

Method Source Code

//package com.java2s;
/*//from w  w w  . j  av a2 s  .  co m
 * Copyright 2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.*;

public class Main {
    public static <T> Set<T> toSet(Iterable<? extends T> things) {
        if (things == null) {
            return new HashSet<T>(0);
        }
        if (things instanceof Set) {
            @SuppressWarnings("unchecked")
            Set<T> castThings = (Set<T>) things;
            return castThings;
        }

        Set<T> set = new LinkedHashSet<T>();
        for (T thing : things) {
            set.add(thing);
        }
        return set;
    }
}

Related

1. asSet(T... items)
2. asSet(T... ts)
3. asSet(T... ts)
4. asSet(T... values)
5. asSet(T... values)
6. toSet(Iterable items)
7. toSet(Object[] someElements)
8. toSet(Set set)
9. toSet(String[] aStringArray)