How to properly scan a file for a specific regular expression, using Scanner and Pattern objects (Java code)

RegexJava.java

Scanner scanner = null;
try{
	// change filePath to your your source
	scanner = new Scanner(new BufferedReader(new FileReader(filePath))); 
	Pattern p = Pattern.compile("--REGEX--"); // enter your regular expression
	while (scanner.hasNext()) {
		Matcher m = p.matcher(scanner.nextLine());
		while (m.find()) {
			String result = m.group();
			// do something with your result
		}
	}
} catch (Exception e) {
	// Catch exception if any
	System.err.println("Error: " + e.getMessage());
} finally {
	if (scanner != null) {
		scanner.close();
	}
}