Java List Sub List subList(List query, int first, int max)

Description

sub List

License

Open Source License

Declaration

public static <T> ArrayList<T> subList(List<T> query, int first, int max) 

Method Source Code

//package com.java2s;
/**/*www.  j av a  2 s  .c  o  m*/
 * Exhibit A - UIRF Open-source Based Public Software License.
 * 
 * The contents of this file are subject to the UIRF Open-source Based Public
 * Software License(the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * openelis.uhl.uiowa.edu
 * 
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 * 
 * The Original Code is OpenELIS code.
 * 
 * The Initial Developer of the Original Code is The University of Iowa.
 * Portions created by The University of Iowa are Copyright 2006-2008. All
 * Rights Reserved.
 * 
 * Contributor(s): ______________________________________.
 * 
 * Alternatively, the contents of this file marked "Separately-Licensed" may be
 * used under the terms of a UIRF Software license ("UIRF Software License"), in
 * which case the provisions of a UIRF Software License are applicable instead
 * of those above.
 */

import java.util.ArrayList;

import java.util.Iterator;
import java.util.List;

public class Main {
    public static <T> ArrayList<T> subList(List<T> query, int first, int max) {
        int to;
        Iterator<T> e;
        ArrayList<T> list;

        if (query == null || query.isEmpty() || first >= query.size())
            return null;

        to = Math.min(first + max, query.size());
        list = new ArrayList<T>(to - first);
        e = query.listIterator(first);
        for (; first < to; first++)
            list.add(e.next());

        return list;
    }

    /**
     * Checks the parameter to see if its null or its length is 0.
     * 
     * @return true if object is empty; otherwise false
     */
    public static boolean isEmpty(Object a) {
        if (a instanceof String)
            return ((String) a).length() == 0;
        return a == null;
    }
}

Related

1. sublist(List list, int start, int limit)
2. subList(List list, int start, int max)
3. subList(List list, int[] indexs)
4. subList(List origin, int start, int length)
5. subList(List parentList, int start, int end)
6. subList(List src, int preBatchCount)
7. subList(List list, int start, int end)
8. subListByStartAndEnd( List list, M start, M end)
9. subListMaxSize(List list, int maxSize)