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  1. Harmony
  2. HARMONY-68

java.nio.charset.Charset.isSupported(String charsetName) does not throw IllegalCharsetNameException for spoiled standard sharset name


    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Won't Fix
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Classlib
    • Labels:


      According to j2se 1.4.2 specification for Charset.isSupported(String charsetName) the method must throw IllegalCharsetNameException "if the given charset name is illegal ".
      "Legal charset name must begin with either a letter or a digit.
      The test listed below shows that there is no the exception if to insert "-" or "_" symbols before standard sharset name, for example "-UTF-8" or "_US-ASCII".

      Moreover the method returns "true" in this case.

      BEA also does not throw the exception but returns "false".

      Code to reproduce:
      import java.nio.charset.*;

      public class test2 {
      public static void main (String[] args) {
      // string starts neither a letter nor a digit
      boolean sup=false;

      { sup=Charset.isSupported("-UTF-8"); System.out.println("***BAD. should be exception; sup="+sup); sup=Charset.isSupported("_US-ASCII"); System.out.println("***BAD. should be exception; sup="+sup); }

      catch (IllegalCharsetNameException e)

      { System.out.println("***OK. Expected IllegalCharsetNameException " + e); }


      Steps to Reproduce:
      1. Build Harmony (check-out on 2006-01-30) j2se subset as described in README.txt.
      2. Compile test2.java using BEA 1.4 javac
      > javac -d . test2.java
      3. Run java using compatible VM (J9)
      > java -showversion test2

      C:\tmp>C:\jrockit-j2sdk1.4.2_04\bin\java.exe -showversion test2
      java version "1.4.2_04"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
      BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32, Native Threads, GC strategy: parallel)
      ***BAD. should be exception; sup=false
      ***BAD. should be exception; sup=false

      C:\tmp>C:\harmony\trunk\deploy\jre\bin\java -showversion test2
      (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
      ***BAD. should be exception; sup=true
      ***BAD. should be exception; sup=true

      Suggested junit test case:
      ------------------------ CharserTest.java -------------------------------------------------
      import java.nio.charset.*;
      import junit.framework.*;

      public class CharsetTest extends TestCase {
      public static void main(String[] args)

      { junit.textui.TestRunner.run(CharsetTest.class); }

      public void test_isSupported() {
      boolean sup=false;
      // string starts neither a letter nor a digit

      { sup=Charset.isSupported("-UTF-8"); fail("***BAD. should be exception IllegalCharsetNameException"); }

      catch (IllegalCharsetNameException e)

      { //expected }
      // string starts neither a letter nor a digit
      try{ sup=Charset.isSupported("_US-ASCII"); fail("***BAD. should be exception IllegalCharsetNameException"); } catch (IllegalCharsetNameException e) { //expected }



        1. charset_patch.txt
          8 kB
          Richard Liang
        2. CharsetTest.java
          0.3 kB
          Svetlana Samoilenko



            • Assignee:
              svetlana Svetlana Samoilenko
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