Android Collection Contains containsInstance(Collection collection, Object element)

Description

Check whether the given Collection contains the given element instance.

License

Apache License

Parameter

Parameter	Description
collection	the Collection to check
element	the element to look for

Return

true if found, false else

Declaration

public static boolean containsInstance(Collection<?> collection,
        Object element) 

Method Source Code

//package com.java2s;
/*//from w  w  w .  j av  a2s  . co  m
 * Copyright 2002-2013 the original author or authors.
 *
 * 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 {
    /**
     * Check whether the given Collection contains the given element instance.
     * <p>
     * Enforces the given instance to be present, rather than returning
     * <code>true</code> for an equal element as well.
     * 
     * @param collection
     *            the Collection to check
     * @param element
     *            the element to look for
     * @return <code>true</code> if found, <code>false</code> else
     */
    public static boolean containsInstance(Collection<?> collection,
            Object element) {
        if (collection != null) {
            for (Object candidate : collection) {
                if (candidate == element) {
                    return true;
                }
            }
        }
        return false;
    }
}

Related

1. contains(Collection collection, T value)
2. containsInstance(Collection collection, Object element)