Java Collection Contain contains(Collection collection, A value)

License

Parameter

Return

Declaration

public static <A> boolean contains(Collection<A> collection, A value) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2016 Pablo Pavon-Marino.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 *
 * Contributors:/*from   w w w.j  a v  a2 s .  c  o  m*/
 *     Pablo Pavon-Marino - Jose-Luis Izquierdo-Zaragoza, up to version 0.3.1
 *     Pablo Pavon-Marino - from version 0.4.0 onwards
 ******************************************************************************/

import java.util.*;

public class Main {
    /**
     * Checks if an input collection contains a given value.
     *
     * @param <A> Key type
     * @param collection Input collection
     * @param value Value to search
     * @return {@code true} if {@code value} is present in {@code collection}, and {@code false} otherwise. If {@code collection} is empty, it will return {@code false}
     */
    public static <A> boolean contains(Collection<A> collection, A value) {
        if (collection.isEmpty())
            return false;

        for (A item : collection)
            if (item == value)
                return true;

        return false;
    }
}

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