Removing CSS comments with Java

Question

I'm trying to make a little program in Java, I need it to remove all the comments from a CSS file and put them in a jList and finally put the CSS file without comments in a jTextArea. It's kinda working, for example:

/* this is a comment */ and this is not

Works:

Another example:

/*
This is a comment
*/
this is not

That one works too:

But, the last one:

/*
w
w
*/

Won't work:

The part of putting the comment in the jList works fine but on the jTextArea is showing the complete file/source...

I don't know what to do, this is getting a little frustrating, I was hopping you guys could give me a hand!

If you don't know some of the words on the program, here's a short translation list:

• Archivo > File
• Abrir > Open
• Cerrar > Close
• Compilar > Compile
• Editor > Editor
• Lexico > Lexic
• Sintactico > Syntax
• Semantico > Semantic
• Comentarios > Comments
• Fuente sin comentarios > Source without comments
• Espacios en blanco > white spaces

This are the source files https://gist.github.com/3929988 (CompiladorGUI.java and regex.java).

I'd really appreciate any help! Thanks in advance.

PS: Sorry for my english. As you could see, spanish is my main language.

Answer 1

Do not try to parse CSS yourself. There are ready-to-use CSS parsers. Take a look on this discussion to start: Looking for a CSS Parser in java

Answer 2

Your regex doesn't match multiple lines. Change the value of the atribute patron to

private String patron = "/\\*((.|[\\n\\r])+)?\\*/";