Java Collection Size size(Collection collection)

Description

Determine the size of a specified collection.

License

Apache License

Parameter

Parameter	Description
collection	- collection to determine the size of

Return

size of the collection

Declaration

@SuppressWarnings("unchecked")
public static int size(Collection collection) 

Method Source Code

//package com.java2s;
/**  /*ww w. j  av  a2s. c  o  m*/
   Copyright 2008 University of Rochester
    
   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 {
    /**
     * Determine the size of a specified collection.
     * 
     * @param collection - collection to determine the size of
     * @return size of the collection
     */
    @SuppressWarnings("unchecked")
    public static int size(Collection collection) {
        if (collection == null) {
            return 0;
        } else {
            return collection.size();
        }
    }
}

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