1/* 2 * Copyright (c) 1997, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25/* @test 26 @bug 4017414 27 @summary Check for correct implementation of PushbackInputStream.available 28 */ 29 30import java.io.*; 31 32 33 34public class Available{ 35 36 private static void dotest(PushbackInputStream in , int expected) 37 throws Exception 38 { 39 40 int got = in.available(); 41 System.err.println("available must be " + expected + " , got : " + got); 42 if (got != expected) { 43 throw new 44 RuntimeException("Unexpected number of bytes available in the PushBackInputStream"); 45 } 46 47 } 48 49 50 51 public static void main(String args[]) throws Exception{ 52 53 PushbackInputStream in = new 54 PushbackInputStream(new ByteArrayInputStream(new byte[10]),5); 55 56 dotest(in , 10); 57 58 in.read(); 59 dotest(in , 9); 60 61 in.unread(20); 62 dotest(in , 10); 63 64 in.unread(20); 65 dotest(in , 11); 66 67 } 68 69} 70