Uploaded image for project: 'Harmony'
  1. Harmony
  2. HARMONY-64

[classlib][nio charset] java.nio.charset.Charset.forName(String name) does not throw UnsupportedCharsetException if valid name starts with "x-"


    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Invalid
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Classlib
    • Labels:


      According to j2se 1.4.2 specification for Charset forName(String charsetName) the method must throw UnsupportedCharsetException "if no support for the named charset is available in this instance of the Java virtual machine". The method does not throw exception if a unsupported name started with "x-". For example, the method throws an exception for not supported name "xyz", but does not for "x-yz".

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

      public class test2 {
      public static void main (String[] args) {

      { Charset ch=Charset.forName("x-yz"); System.out.println("***BAD. UnsupportedCharsetException must be thrown instead of creating "+ch); }

      catch (UnsupportedCharsetException e)

      { System.out.println("***OK. Expected UnsupportedCharsetException " + 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)
      ***OK. Expected UnsupportedCharsetException java.nio.charset.UnsupportedCharsetException: x-yz

      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. UnsupportedCharsetException must be thrown instead of creating Charset[x-yz]

      Suggested junit test case:
      ------------------------ CharsetTest.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_forName() {

      { Charset ch=Charset.forName("x-yz"); fail("Assert 0: UnsupportedCharsetException must be thrown instead of creating: " + ch); }

      catch (UnsupportedCharsetException e) {


        1. ICUInterface34.dll
          88 kB
          Richard Liang
        2. libICUInterface34.so
          32 kB
          Richard Liang



            • Assignee:
              tellison Tim Ellison
              svetlana Svetlana Samoilenko
            • Votes:
              0 Vote for this issue
              1 Start watching this issue


              • Created: