Regular Expression Example using Java

Okay.java

String title = "Regular Expressions in 10 different languages";

// Note we have to escape the \ as that is an escape character in Java
boolean result = title.matches("\\d+");

// To extract the pattern
Pattern pattern = Pattern.compile("(\\d+)");
Matcher matcher = pattern.match(title);
while (matcher.find()) {
    System.out.printf("There are %s languages represented.",
                      matcher.group(1));
}