com.xiongyingqi.util.CollectionHelper Maven / Gradle / Ivy

Go to download
/**
 * YIXUN_2.0
 */
package com.xiongyingqi.util;

import java.util.*;

/**
 * @author 瑛琪 xiongyingqi.com
 * @version 2013-8-22 下午3:50:35
 */
public class CollectionHelper {
    public static boolean notNullAndHasSize(Collection collection) {
        return collection != null && collection.size() > 0;
    }

    public static  Collection checkOrInitHashSet(Collection collection) {
        if (collection == null) {
            collection = new HashSet();
        }
        return collection;
    }

    public static  Collection checkOrInitLinkedHashSet(Collection collection) {
        if (collection == null) {
            collection = new LinkedHashSet();
        }
        return collection;
    }

    public static  Map checkOrInitHashMap(Map map) {
        if (map == null) {
            map = new HashMap();
        }
        return map;
    }

    public static  Map checkOrInitLinkedHashMap(Map map) {
        if (map == null) {
            map = new LinkedHashMap();
        }
        return map;
    }

    public static  Collection checkOrInitArrayList(Collection collection) {
        if (collection == null) {
            collection = new ArrayList();
        }
        return collection;
    }

    public static  Collection checkOrInitLinkedList(Collection collection) {
        if (collection == null) {
            collection = new LinkedList();
        }
        return collection;
    }


    public static void main(String[] args) {
        Object a = null;
        a = checkOrInitHashSet((Collection