1/* 2 * Copyright (c) 2008, 2010, 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/* @test 25 * @summary Verify that if InputStream.read returns 0 we throw an exception. 26 * @bug 4684515 27 */ 28 29import java.io.*; 30 31public class ReadZero { 32 33 public static void main(String [] args) throws IOException { 34 ReadZero r = new ReadZero(); 35 r.testInputStream(); 36 } 37 38 private void testInputStream() throws IOException { 39 File f = new File(System.getProperty("test.src", "."), "ReadZero.java"); 40 InputStream is = new FileInputStream(f) { 41 public int read(byte [] b, int off, int len) { 42 System.out.println("FileInputStream.read"); 43 return 0; 44 } 45 }; 46 try { 47 is.read(new byte[1], 0, 1); // ok 48 InputStreamReader isr = new InputStreamReader(is); 49 50 try { 51 int res = isr.read(new char[1], 0, 1); 52 } catch (IOException x) { 53 System.out.println("IOException caught"); 54 return; 55 } 56 } finally { 57 is.close(); 58 } 59 throw new RuntimeException("IOException not thrown"); 60 } 61} 62