Java SortedMap Usage firstElement(Collection c)

Description

first Element

License

Open Source License

Declaration

public static <T> T firstElement(Collection<T> c) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2010 BSI Business Systems Integration AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * /* w ww  .jav a2  s  . c o m*/
 * Contributors:
 *     BSI Business Systems Integration AG - initial API and implementation
 ******************************************************************************/

import java.util.Collection;

import java.util.List;

import java.util.SortedMap;

public class Main {
    public static <T> T firstElement(Collection<T> c) {
        if (c == null || c.size() == 0) {
            return null;
        } else {
            return c.iterator().next();
        }
    }

    public static <T, U> U firstElement(SortedMap<T, U> m) {
        return m.get(m.firstKey());
    }

    public static <T> int size(List<T> list) {
        if (list == null) {
            return 0;
        }
        return list.size();
    }
}

Related

1. computeByteSizeM( SortedMap byteSizeByName)
2. computePathCauselessLms( List>> depCausesByNameList)
3. filterPrefix( SortedMap baseMap, String prefix)
4. find(SortedMap map, String baseName)
5. firstElement(Collection c)
6. generatePropertiesFilter(SortedMap propertiesMap)
7. getAll(SortedMap map)
8. getObjectSortedMap(SortedMap map, T key)
9. isCollectionClass(Class clazz)