code: private String parseJavaId() {
  		StringBuilder sb = new StringBuilder();
  		int ch;
  		while (true) {
  			ch = peekChar();
  			if (ch == EOS || !isJavaIdentifierPart(ch)) {
  				return sb.toString();
  			}
  			sb.append((char) ch);
  			nextChar();
  		}
  	}
docs: parse a java id
  
  @return