REGRESSION: URLConnection.connect() throws Exception with non UTF-8 char

FULL PRODUCT VERSION :
java version "1.5.0_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_03-b07)
Java HotSpot(TM) Client VM (build 1.5.0_03-b07, mixed mode, sharing)

java version "1.5.0_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_03-b07)
Java HotSpot(TM) Client VM (build 1.5.0_03-b07, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Linux ulysses 2.2.19pre17 #1 Tue Mar 13 22:37:59 EST 2001 i586 unknown
Microsoft Windows XP [Version 5.1.2600]


A DESCRIPTION OF THE PROBLEM :
The directory name part of URL is the one that "Day" of the Chinese character was shown by the ShiftJIS character-code.

class Bug {
    public static void main(String[] args) throws Exception {
        java.net.URL url = new java.net.URL("http://www.example.com/%93%fa/");
        java.net.URLConnection uc = url.openConnection();
        uc.connect();
    }
}

results in:
Exception in thread "main" java.lang.IllegalArgumentException
        at sun.net.www.ParseUtil.decode(ParseUtil.java:179)
        at sun.net.www.ParseUtil.toURI(ParseUtil.java:253)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConne
ction.java:738)
        at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection
.java:669)
        at Bug.main(Bug.java:5)


REPRODUCIBILITY :
This bug can be reproduced always.

Release Regression From : 1.4.2
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.
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