java Error in reading

heres my code

String a = "|--> ";
String b = " <--|";
String wordfind;
File pal = new File("palringo.exe");
try {
    Scanner word = new Scanner(pal);
    Pattern tag = Pattern.compile("|-->(.+?)<--|");
     wordfind = word.findInLine(tag);
     Matcher matcher = tag.matcher(wordfind);
    while(matcher.find()){
    wordfind=wordfind.replaceAll(a, "").replaceAll(b, "");
    }
    PrintWriter writer = new PrintWriter(pal);
    writer.print(wordfind);
} catch (FileNotFoundException e) {

the input in palringo.exe is this
|--> example <--|
the output my project should print the word(in palringo..exe) like this :

example

what im doing wrong ?