Mercurial > jdk8-mips64-public > langtools / annotate
test/tools/javac/versions/CheckClassFileVersion.java@0ff2bbd38f10 (annotated)
test/tools/javac/versions/CheckClassFileVersion.java
Wed, 06 Apr 2011 20:33:44 -0700
- author
- ohair
- date
- Wed, 06 Apr 2011 20:33:44 -0700
- changeset 962
- 0ff2bbd38f10
- parent 554
- 9d9f26857129
- child 2525
- 2eb010b6cb22
- permissions
- -rw-r--r--
7033660: Update copyright year to 2011 on any files changed in 2011
Reviewed-by: dholmes
| duke@1 | 1 | /* |
| ohair@554 | 2 | * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. |
| duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@1 | 4 | * |
| duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@1 | 7 | * published by the Free Software Foundation. |
| duke@1 | 8 | * |
| duke@1 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@1 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@1 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@1 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@1 | 13 | * accompanied this code). |
| duke@1 | 14 | * |
| duke@1 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@1 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@1 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@1 | 18 | * |
| ohair@554 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| ohair@554 | 20 | * or visit www.oracle.com if you need additional information or have any |
| ohair@554 | 21 | * questions. |
| duke@1 | 22 | */ |
| duke@1 | 23 | |
| duke@1 | 24 | import java.io.*; |
| duke@1 | 25 | import java.nio.*; |
| duke@1 | 26 | import java.nio.channels.*; |
| duke@1 | 27 | |
| duke@1 | 28 | |
| duke@1 | 29 | public class CheckClassFileVersion { |
| duke@1 | 30 | |
| duke@1 | 31 | static String get(String fn) throws IOException { |
| duke@1 | 32 | ByteBuffer bb = ByteBuffer.allocate(1024); |
| duke@1 | 33 | FileChannel fc = new FileInputStream(fn).getChannel(); |
| duke@1 | 34 | try { |
| duke@1 | 35 | bb.clear(); |
| duke@1 | 36 | if (fc.read(bb) < 0) |
| duke@1 | 37 | throw new IOException("Could not read any bytes"); |
| duke@1 | 38 | bb.flip(); |
| duke@1 | 39 | int minor = bb.getShort(4); |
| duke@1 | 40 | int major = bb.getShort(6); |
| duke@1 | 41 | return major + "." + minor; |
| duke@1 | 42 | } finally { |
| duke@1 | 43 | fc.close(); |
| duke@1 | 44 | } |
| duke@1 | 45 | } |
| duke@1 | 46 | |
| duke@1 | 47 | public static void main(String[] args) throws IOException { |
| duke@1 | 48 | String cfv = get(args[0]); |
| duke@1 | 49 | if (args.length == 1) { |
| duke@1 | 50 | System.out.println(cfv); |
| duke@1 | 51 | return; |
| duke@1 | 52 | } |
| duke@1 | 53 | if (!cfv.equals(args[1])) { |
| duke@1 | 54 | System.err.println("Class-file version mismatch: Expected " |
| duke@1 | 55 | + args[1] + ", got " + cfv); |
| duke@1 | 56 | System.exit(1); |
| duke@1 | 57 | } |
| duke@1 | 58 | } |
| duke@1 | 59 | |
| duke@1 | 60 | } |
