jFlex error: class throws java.io.IOException

Question

I have written a very simple file with specification shown below to to tokenize words: ``` %% %class Lexer %unicode WORD = [^
	 ] %% {WORD} {System.out.println("Word is:"+yytext());} . {System.out.println("Bad character: "+ yytext());} ``` The following are the commands I run: ``` jflex hindi.jlex javac Lexer.java ``` I get the following error: ``` Lexer.java:442: cannot find symbol symbol : class Yytoken location: class Lexer public Yytoken yylex() throws java.io.IOException { ^ 1 error ``` Any help appreciated. On a additional note I checked the `Lexer.java` file and there was no `main` function in it. Is that the reason for this error.

Accepted Answer

If you want to check the lexer standalone(without a parser) then add the following to the user code section:

```
%standalone
```

jFlex error: class throws java.io.IOException

Solution

Problem