| /* |
| * Copyright (c) 1997, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* @test |
| @bug 4085938 |
| @summary Check for the correct behaviour of DataInputStream.skipBytes |
| */ |
| |
| import java.io.*; |
| |
| public class SkipBytes{ |
| |
| private static void dotest(DataInputStream dis, int pos, int total, |
| int toskip, int expected) { |
| |
| try { |
| System.err.println("\n\nTotal bytes in the stream = " + total); |
| System.err.println("Currently at position = " + pos); |
| System.err.println("Bytes to skip = " + toskip); |
| System.err.println("Expected result = " + expected); |
| int skipped = dis.skipBytes(toskip); |
| System.err.println("Actual skipped = " + skipped); |
| if (skipped != expected) { |
| throw new RuntimeException |
| ("DataInputStream.skipBytes does not return expected value"); |
| } |
| } catch(EOFException e){ |
| throw new RuntimeException |
| ("DataInputStream.skipBytes throws unexpected EOFException"); |
| } catch (IOException e) { |
| System.err.println("IOException is thrown - possible result"); |
| } |
| |
| |
| } |
| |
| |
| |
| public static void main(String args[]) throws Exception { |
| |
| DataInputStream dis = new DataInputStream(new MyInputStream()); |
| dotest(dis, 0, 11, -1, 0); |
| dotest(dis, 0, 11, 5, 5); |
| System.err.println("\n***CAUTION**** - may go into an infinite loop"); |
| dotest(dis, 5, 11, 20, 6); |
| } |
| } |
| |
| |
| class MyInputStream extends InputStream { |
| |
| private int readctr = 0; |
| |
| public int read() { |
| |
| if (readctr > 10){ |
| return -1; |
| } |
| else{ |
| readctr++; |
| return 0; |
| } |
| |
| } |
| |
| public int available() { return 0; } |
| } |