Java Collection First GET_FIRST_ELEMENT(Collection coll)

Description

Returns the first element of the given collection.

License

Apache License

Parameter

Parameter	Description
coll	input collection

Return

first element of the collection or null if not applicable

Declaration

public static Object GET_FIRST_ELEMENT(Collection<?> coll) 

Method Source Code

//package com.java2s;
/* Copyright 2014 Sven van der Meer <vdmeer.sven@mykolab.com>
 *
 * 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
 * //from  w  w  w . jav a 2  s .  com
 *     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 {
    /**
     * Returns the first element of the given collection.
     * @param coll input collection
     * @return first element of the collection or null if not applicable
     */
    public static Object GET_FIRST_ELEMENT(Collection<?> coll) {
        Object ret = null;
        if (coll.size() > 0) {
            Object[] ar = new Object[coll.size()];
            ar = coll.toArray(ar);
            for (int i = 0; i < ar.length; i++) {
                if ((ar[i] != null)) {
                    ret = ar[i];
                    break;
                }
            }
        }
        return ret;
    }
}

Related

1. firstFrom(Collection coll)
2. firstNonEmpty(Collection... collections)
3. firstNonNull(Collection collection)
4. firstOrThat(Collection collection, T that)
5. firstValue(Class type, Collection values)
6. getCollectionFirstElement( final Collection collection)
7. getFirst(Collection c)
8. getFirst(Collection c)
9. getFirst(Collection collection)