Java Iterator Size size(Iterator iterator)

Description

Resolves the size of a given Iterator by iterating over it.

License

Apache License

Parameter

Parameter	Description
iterator	a parameter

Declaration

public static int size(Iterator<?> iterator) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2012 Danny Kunz/*from www .ja  va  2  s  . co m*/
 * 
 * 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.Iterator;

public class Main {
    /**
     * Resolves the size of a given {@link Iterator} by iterating over it.
     * 
     * @param iterator
     * @return
     */
    public static int size(Iterator<?> iterator) {
        //
        int retval = 0;

        //
        if (iterator != null) {
            for (; iterator.hasNext(); iterator.next()) {
                retval++;
            }
        }

        //
        return retval;
    }
}

Related

1. count(Iterator iterator)
2. count(Iterator it)
3. counter(final Iterator iterator)
4. size(final Iterator iter)
5. size(Iterator source)
6. size(Iterator iterator)