Java Pattern/ Matcher

Question

This is a sample text: \\1f\\1e\\1d\\020028. I cannot modify the input text, I am reading long string of texts from a file.

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I wan

Answer 1

If you don't want to modify the input string, you could try something like:

static public void main(String[] argv) {

            String s = "\1f\1e\1d\020028";
            Pattern regex = Pattern.compile("[\\x00-\\x1f][0-9A-Fa-f]");
            Matcher match = regex.matcher(s);
            while (match.find()) {
                    char[] c = match.group().toCharArray();
                    System.out.println(String.format("\\%d%s",c[0]+0, c[1])) ;
            }
    }

Yes, it's not perfect, but you get the idea.