Save as *.html

Question

how to save filename as .html. If the filename contains invalid character such as /\":?*<>|, user must change to another filename.

Answer 1

import java.io.*;
public class InvalidFile{
public static void main(String[] args) {
     String filename = "invalid$#^//..";
                      try{
     FileOutputStream fos = new FileOutputStream(new File(filename + ".html"));
     } catch(Exception e){
     System.out.println("" + e);
}compile and run this.
youll notice the error is:
java.io.FileNotFoundException: invalid$#^\...html (The system cannot find the path specified)
Press any key to continue . . .
which is thrown by FileOutputStream.
So... either catch the invalid filename there or check the String
representing the filename with regex or something.