encoder.canEncode("\uc2a3");
boolean enc = encoder.canEncode("\uc2a3"); if(enc==true){ errln("88591 encoder returned true for \\uc2a3"); }
    public void TestISO88591() {        CharsetEncoder encoder = new CharsetProviderICU().charsetForName("iso-8859-1").newEncoder();        encoder.canEncode("\uc2a3");    }