public static boolean containsIllegalXML(String str) {
        assert str != null;
        for (int index = 0; index < str.length(); index++) {
            char ch = str.charAt(index);
            if ((ch <= 0x08) ||
                (ch >= 0x0B && ch <= 0x0C) ||
                (ch >= 0x0E && ch <= 0x19) ||
                (ch >= 0xD800 && ch <= 0xDFFF) ||
                (ch >= 0xFFFE)) {
                return true;
            }
        }
        return false;
    }
public static boolean containsIllegalXML ( String str ) { assert str != null ; for ( int index = 0 ; index < str . length ( ) ; index ++ ) { char ch = str . charAt ( index ) ; if ( ( ch <= 0x08 ) || ( ch >= 0x0B && ch <= 0x0C ) || ( ch >= 0x0E && ch <= 0x19 ) || ( ch >= 0xD800 && ch <= 0xDFFF ) || ( ch >= 0xFFFE ) ) { return true ; } } return false ; }
Returns true if the given string contains any characters that are considered illegal
in XML. See http://www.w3.org/TR/xml/#charsets. The legal XML characters XML are:
<pre>
#x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
</pre>
Note that Java String chars can only be up to 0xFFFF

@param   str Non-null string to be tested.
@return      True if the string contains a character considered illegal in XML.