Java Collection Intersect hasIntersection(Collection col1, Collection col2)

Description

has Intersection

License

Apache License

Declaration

static public <T> boolean hasIntersection(Collection<T> col1, Collection<T> col2) 

Method Source Code

//package com.java2s;
/**/*from   ww  w  .  jav  a  2  s . c om*/
 * Copyright 2014, Emory University
 * 
 * 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.Collection;

public class Main {
    static public <T> boolean hasIntersection(Collection<T> col1, Collection<T> col2) {
        if (col2.size() < col1.size()) {
            Collection<T> tmp = col1;
            col1 = col2;
            col2 = tmp;
        }

        for (T item : col1) {
            if (col2.contains(item))
                return true;
        }

        return false;
    }
}

Related

1. getIntersection( final Collection> collections)
2. getIntersection(Collection collection1, Collection collection2)
3. hasIntersection(Collection s1, Collection s2)
4. hasIntersection(Collection a, Collection b)
5. hasIntersection(Collection c1, Collection c2)
6. hasIntersection(final Collection a, final Collection b)
7. intersect(Collection c1, Collection c2)
8. intersect(Collection c1, Collection c2)
9. intersect(Collection collection, Collection otherCollection)