jcifs.internal.util.StringUtil Maven / Gradle / Ivy

/*
 * © 2017 Matthias Bläsing 
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.internal.util;


/**
 * 
 */
public final class StringUtil {

    /**
     * 
     */
    private StringUtil () {}


    /**
     * Implementation of {@link java.lang.String#join} backported for JDK7.
     * 
     * @param delimiter
     * @param elements
     * @return elements separated by delimiter
     */
    public static String join ( CharSequence delimiter, CharSequence... elements ) {
        StringBuilder sb = new StringBuilder();
        for ( CharSequence element : elements ) {
            if ( sb.length() > 0 ) {
                if ( delimiter != null ) {
                    sb.append(delimiter);
                }
                else {
                    sb.append("null");
                }
            }
            sb.append(element);
        }
        return sb.toString();
    }
}