Java Collection First firstElementOf(final Collection items)

Description

first Element Of

License

Apache License

Declaration

public static <T> T firstElementOf(final Collection<? extends T> items) 

Method Source Code

//package com.java2s;
/*//  ww  w .  j a  va 2 s  .  c  o m
 * Copyright 2012 Daniel Bechler
 *
 * 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.*;

public class Main {
    public static <T> T firstElementOf(final Collection<? extends T> items) {
        if (items != null && !items.isEmpty()) {
            return items.iterator().next();
        }
        return null;
    }

    public static boolean isEmpty(final Collection<?> c) {
        return c == null || c.isEmpty();
    }
}

Related

1. first(Collection collection)
2. first(Collection collection)
3. firstElement(Collection in)
4. firstElement(Collection c)
5. firstElementOf(final Collection collection)
6. firstFrom(Collection collection)
7. firstFrom(Collection coll)
8. firstNonEmpty(Collection... collections)
9. firstNonNull(Collection collection)