Java Collection Subtract subtract(Collection a, Collection b)

Description

subtract

License

BSD License

Declaration

public static List<Integer> subtract(Collection<Integer> a, Collection<Integer> b) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright SemanticBits, Northwestern University and Akaza Research
 * //w  w  w.jav a 2s. c om
 * Distributed under the OSI-approved BSD 3-Clause License.
 * See http://ncip.github.com/caaers/LICENSE.txt for details.
 ******************************************************************************/

import java.util.*;

public class Main {
    public static List<Integer> subtract(Collection<Integer> a, Collection<Integer> b) {
        Set<Integer> y = new HashSet<Integer>(b);
        Set<Integer> z = new HashSet<Integer>();
        for (Integer i : a) {
            if (y.add(i))
                z.add(i);
        }
        return new ArrayList(z);
    }
}

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