1 /*
   2  * Copyright (c) 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 6330020
  26  * @summary Ensure Charset.forName/isSupport throws the correct exception
  27  *          if the charset names passed in are illegal.
  28  */
  29 
  30 import java.nio.charset.*;
  31 
  32 public class IllegalCharsetName {
  33     public static void main(String[] args) throws Exception {
  34         String[] illegalNames = {
  35             ".",
  36             "_",
  37             ":",
  38             "-",
  39             ".name",
  40             "_name",
  41             ":name",
  42             "-name",
  43             "name*name",
  44             "name?name"
  45         };
  46         for (int i = 0; i < illegalNames.length; i++) {
  47             try {
  48                 Charset.forName(illegalNames[i]);
  49                 throw new Exception("Charset.forName(): No exception thrown");
  50             } catch (IllegalCharsetNameException x) { //expected
  51             }
  52 
  53             try {
  54                 Charset.isSupported(illegalNames[i]);
  55                 throw new Exception("Charset.isSupported(): No exception thrown");
  56             } catch (IllegalCharsetNameException x) { //expected
  57             }
  58         }
  59 
  60         // Standard charsets may bypass alias checking during startup, test that
  61         // they're all well-behaved as a sanity test
  62         checkAliases(StandardCharsets.ISO_8859_1);
  63         checkAliases(StandardCharsets.US_ASCII);
  64         checkAliases(StandardCharsets.UTF_8);
  65     }
  66 
  67     private static void checkAliases(Charset cs) {
  68         for (String alias : cs.aliases()) {
  69             Charset.forName(alias);
  70             Charset.isSupported(alias);
  71         }
  72     }
  73 }