Here you can find the source of close(Appendable output)
public static void close(Appendable output) throws IOException
//package com.java2s; /*/*from w w w.j av a 2 s . co m*/ * Copyright (C) 2010 Stephen Tigner * * 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 2 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA. */ import java.io.*; public class Main { /** Close if possible */ public static void close(Appendable output) throws IOException { if (output instanceof Closeable) ((Closeable) output).close(); } }