Java List First Item removeFirst(final List list)

Description

Removes the first object from the given List.

License

Apache License

Parameter

Parameter	Description
T	the generic type
list	the List.

Return

Removes and returns the first object from the given List or null if the List is empty or null.

Declaration

public static <T> T removeFirst(final List<T> list) 

Method Source Code

//package com.java2s;
/**/*w w w.j av a2  s. c o  m*/
 * Copyright (C) 2007 Asterios Raptis
 *
 * 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 {
    /**
     * Removes the first object from the given List.
     *
     * @param <T>
     *            the generic type
     * @param list
     *            the List.
     * @return Removes and returns the first object from the given List or null if the List is empty
     *         or null.
     */
    public static <T> T removeFirst(final List<T> list) {
        if (!isEmpty(list) && 0 < list.size()) {
            return list.remove(0);
        }
        return null;
    }

    /**
     * Checks if a List is null or empty.
     *
     * @param <T>
     *            the generic type
     * @param list
     *            The List to check.
     * @return true if the list is null or empty otherwise false.
     */
    public static <T> boolean isEmpty(final List<T> list) {
        return list == null || list.isEmpty();
    }
}

Related

1. orderByFirstOccurenceInText(String listToOrder[], String textToParse, boolean fuzzy)
2. orderByFuzzyFirstOccurenceInText(String listToOrder[], String textToParse)
3. permutationsWithFirstElement(List listings)
4. prepend(String first, List list)
5. putFirstLast(List list)
6. removeFirst(List list)
7. removeFirst(List list)
8. removeFirstElement(List l)
9. removeFirstHalfElements(final List list)