Java Collection Join isDisjoint(Collection a, Collection b)

License

Parameter

Return

Declaration

public static boolean isDisjoint(Collection<?> a, Collection<?> b) 

Method Source Code

//package com.java2s;
/*//from w ww .j  a v  a  2s .co m
 * 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 {
    /**
     * Returns true if <tt>Collection</CODE>s are disjoint each other.
     *
     * @param a <tt>Collection</tt> to be examined.
     * @param b the other <tt>Collection</tt> to be examined.
     *
     * @return true if given <tt>Collection</tt>s are disjoint each other
     */
    public static boolean isDisjoint(Collection<?> a, Collection<?> b) {
        if (a == null || b == null)
            return true;

        Collection<?> tester = (a.size() < b.size()) ? a : b;
        Collection<?> testant = (a.size() < b.size()) ? b : a;

        for (Object o : tester) {
            if (testant.contains(o))
                return false;
        }

        return true;
    }
}

Related

1. getNeoString(String columnName, String delimiter, Collection input, String join)
2. implode(Collection items, String join)
3. internalJoin(String sep, Collection