1 /* 2 * Copyright (c) 1998, 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 @bug 4101707 26 @summary Test if fill() will behave correctly at EOF to 27 allow file to grow. 28 */ 29 30 import java.io.*; 31 32 public class GrowAfterEOF { 33 public static void main(String[] args) throws Exception { 34 File input = new File(".", "TestEOFInput.txt"); 35 RandomAccessFile rf = new RandomAccessFile(input, "rw"); 36 try { 37 BufferedReader r = new BufferedReader 38 (new InputStreamReader(new FileInputStream(input))); 39 try { 40 // write something 41 rf.writeBytes("a line"); 42 43 // read till the end of file 44 while (r.readLine() != null); 45 46 // append to the end of the file 47 rf.seek(rf.length()); 48 rf.writeBytes("new line"); 49 50 // now try to read again 51 boolean readMore = false; 52 while (r.readLine() != null) { 53 readMore = true; 54 } 55 if (!readMore) { 56 input.delete(); 57 throw new Exception("Failed test: unable to read!"); 58 } else { 59 input.delete(); 60 } 61 } finally { 62 r.close(); 63 } 64 } finally { 65 rf.close(); 66 } 67 } 68 }