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23 
24 /* @test
25  * @bug 6330020 8184665
26  * @summary Ensure Charset.forName/isSupport throws the correct exception
27  *          if the charset names passed in are illegal.
28  */
29 package test.java.nio.charset.Charset;
30 
31 import java.nio.charset.*;
32 
33 public class IllegalCharsetName {
main(String[] args)34     public static void main(String[] args) throws Exception {
35         String[] illegalNames = {
36             ".",
37             "_",
38             ":",
39             "-",
40             ".name",
41             "_name",
42             ":name",
43             "-name",
44             "name*name",
45             "name?name"
46         };
47         for (int i = 0; i < illegalNames.length; i++) {
48             try {
49                 Charset.forName(illegalNames[i]);
50                 throw new Exception("Charset.forName(): No exception thrown");
51             } catch (IllegalCharsetNameException x) { //expected
52             }
53 
54             try {
55                 Charset.isSupported(illegalNames[i]);
56                 throw new Exception("Charset.isSupported(): No exception thrown");
57             } catch (IllegalCharsetNameException x) { //expected
58             }
59         }
60 
61         // Standard charsets may bypass alias checking during startup, test that
62         // they're all well-behaved as a sanity test
63         checkAliases(StandardCharsets.ISO_8859_1);
64         checkAliases(StandardCharsets.US_ASCII);
65         checkAliases(StandardCharsets.UTF_8);
66     }
67 
checkAliases(Charset cs)68     private static void checkAliases(Charset cs) {
69         for (String alias : cs.aliases()) {
70             Charset.forName(alias);
71             Charset.isSupported(alias);
72         }
73     }
74 }
75