public String[] analyze(String input) {
StringTokenizer stringTokenizer =
new StringTokenizer(input.replace(" ", ""), "+-*/()<!F", true);
String tokens[] = new String[stringTokenizer.countTokens()];
for (int i = 0; i < tokens.length; i++) {
tokens[i] = stringTokenizer.nextToken();
}
for (int i = 0; i < tokens.length; i++) {
for (Token token : Token.values()) {
if (tokens[i].equals(token.getCharacter())) {
tokens[i] = token.name();
} else {
try {
Integer.parseInt(tokens[i]);
break;
} catch (NumberFormatException ex) {
}
}
}
}
return tokens;
}