Java Set sub set sub(Set a, Set b)

Description

sub

License

Open Source License

Declaration

public static Set<?> sub(Set<?> a, Set<?> b) 

Method Source Code

//package com.java2s;
/*/*from   w w  w .j  av a 2s.c  o 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.Collections;
import java.util.Set;
import java.util.HashSet;

public class Main {
    public static Set<?> sub(Set<?> a, Set<?> b) {
        if (a == null)
            return Collections.EMPTY_SET;

        if (b == null)
            return new HashSet<Object>(a);

        Set<Object> sub = new HashSet<Object>();
        for (Object obj : a) {
            if (!b.contains(obj))
                sub.add(obj);
        }
        return sub;
    }
}

Related

1. getFirstSubString(String s, Set delimiters)
2. getSubsets(Set set)
3. split(Set original, int subsetSize)
4. subset(double[] vals, boolean[] select)
5. subset(Set sub, Set sup)
6. subSet(Set nn, T n)