Java List IndexOf indexOfNull(List list)

Description

Returns the index of the first null element within the given List .

License

Apache License

Parameter

Parameter	Description
list	a parameter

Declaration

public static <E> int indexOfNull(List<E> list) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2011 Danny Kunz//from ww  w .  ja  va  2s.  c  om
 * 
 * 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.List;

public class Main {
    /**
     * Returns the index of the first null element within the given {@link List}. If the given {@link List} is null or no element of
     * the {@link List} is null, -1 is returned.
     * 
     * @param list
     * @return
     */
    public static <E> int indexOfNull(List<E> list) {
        int retval = -1;
        if (list != null) {
            retval = list.indexOf(null);
        }
        return retval;
    }
}

Related

1. indexOfInstance(List list, Object object)
2. indexOfInstance(List list, Class type)
3. indexOfMax(List list)
4. indexOfMax(List list)
5. indexOfMinSize(final List> sets)
6. indexOfThatStartsWith(List list, String startsWith, int startIndex)
7. indexOfType(List list, Class type)