Java Collection Subtract subtract(Collection l1, Collection l2)

Description

Returns all elements that are in l1 but not in l2 as a list.

License

Open Source License

Declaration

public static <T> List<T> subtract(Collection<T> l1, Collection<T> l2) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2007, 2008 Tran Nam Quang.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors://from  ww  w.j  ava2s  . co m
 *    Tran Nam Quang - initial API and implementation
 *******************************************************************************/

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class Main {
    /**
     * Returns all elements that are in <tt>l1</tt> but not in <tt>l2</tt> as
     * a list.
     */
    public static <T> List<T> subtract(Collection<T> l1, Collection<T> l2) {
        List<T> newList = new ArrayList<T>(l1);
        newList.removeAll(l2);
        return newList;
    }
}

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