Java Collection Intersect intersect(Collection a, Collection b)

Description

Returns a copy of a containing only elements also in b .

License

Apache License

Declaration

public static <T> List<T> intersect(Collection<T> a, Collection<T> b) 

Method Source Code

//package com.java2s;
/*/*ww w.ja va2 s.  c o m*/
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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.ArrayList;

import java.util.Collection;
import java.util.Collections;

import java.util.List;

public class Main {
    /**
     * Returns a copy of {@code a} containing only elements also in {@code b}. The returned elements
     * are in the same order as in {@code a}.
     */
    public static <T> List<T> intersect(Collection<T> a, Collection<T> b) {
        List<T> result = new ArrayList<>();
        for (T t : a) {
            if (b.contains(t)) {
                result.add(t);
            }
        }
        return Collections.unmodifiableList(result);
    }
}

Related

1. hasIntersection(final Collection a, final Collection b)
2. intersect(Collection c1, Collection c2)
3. intersect(Collection c1, Collection c2)
4. intersect(Collection collection, Collection otherCollection)
5. intersect(Collection... collections)
6. intersect(Collection collA, Collection collB, Collection target)
7. intersect(Collection collection1, Collection collection2)
8. intersect(Collection t1, Collection t2)
9. intersectCollections(Collection collection1, Collection collection2)