The org.apache.poi.hssf.record.UnicodeString class doesn't compile under JDK 
1.3 because it is calling new RuntimeException(Exception) this constructor was 
introduced in JDK 1.4

The offending code is in the method fillFields(byte[] , short) and the snippet 
below shows the problem.


            try {
                field_3_string = new String(data, 3, getCharCount(), 
                                        StringUtil.getPreferredEncoding());
            } catch (UnsupportedEncodingException e) {
                throw new RuntimeException(e);
            }