Java tutorial
import java.util.regex.Matcher; import java.util.regex.Pattern; public class MainClass { public static void main(String[] args) { if (args.length < 2) { System.out.println("Usage:\n" + "java MainClass " + "characterSequence regularExpression+"); System.exit(0); } System.out.println("Input: \"" + args[0] + "\""); for (int i = 1; i < args.length; i++) { System.out.println("Regular expression: \"" + args[i] + "\""); Pattern p = Pattern.compile(args[i]); Matcher m = p.matcher(args[0]); while (m.find()) { System.out.println("Match \"" + m.group() + "\" at positions " + m.start() + "-" + (m.end() - 1)); } } } }