UnsupportedEncodingException "UTF-8"

[Sachin Kolpuke]

Dear All;
            Please help me to resolve the error "UnsupportedEncodingException".
I am posting an xml request to a server, 

        HttpClient client = new HttpClient(url);
        String response = client.post(xmlString);

The server gives response in the format of "UTF-8".  OfBiz gives following error on line number 2nd. 

java.io.UnsupportedEncodingException: "UTF-8"
        at sun.io.Converters.getConverterClass(Converters.java:215)
        at sun.io.Converters.newConverter(Converters.java:248)
        at sun.io.ByteToCharConverter.getConverter(ByteToCharConverter.java:64)
        at sun.nio.cs.StreamDecoder$ConverterSD.<init>(StreamDecoder.java:223)
        at sun.nio.cs.StreamDecoder$ConverterSD.<init>(StreamDecoder.java:209)
        at sun.nio.cs.StreamDecoder.forInputStreamReader(StreamDecoder.java:76)
        at java.io.InputStreamReader.<init>(InputStreamReader.java:83)
        at org.ofbiz.base.util.HttpClient.sendHttpRequest(HttpClient.java:317)
        at org.ofbiz.base.util.HttpClient.post(HttpClient.java:197)
        at SimpleHttpClient.main(SimpleHttpClient.java:39)



Thanks and Regards;
Sachin