Java List Truncate setSize(L list, int newsize)

Description

Truncates 'list' or adds null elements to its end

License

Open Source License

Declaration

public static <T, L extends java.util.List<T>> L setSize(L list, int newsize) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (C) 2006-2013 AITIA International, Inc.
 * /*from  w  ww.j av a  2  s. c  o m*/
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/

public class Main {
    /** Truncates 'list' or adds null elements to its end */
    public static <T, L extends java.util.List<T>> L setSize(L list, int newsize) {
        int n = list.size();
        if (newsize > n) {
            list.addAll(java.util.Collections.<T>nCopies(newsize - n, null));
        } else if (newsize < n) {
            list.subList(newsize, n).clear();
        }
        return list;
    }

    /** Removes all content from 'sb'. */
    public static void clear(StringBuilder sb) {
        if (sb != null && sb.length() > 0)
            sb.delete(0, sb.length());
    }
}

Related

1. setSize(List list, int size)
2. trunc(List as, int length)
3. truncate(final List list, final int newSize)
4. truncate(final List items, final int limit)