regextestharnessv5.java

Regular Expressions of Java Tutorial

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexTestHarnessV5 {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		while (true) {
			System.out.printf("%nEnter your regex: ");
			Pattern pattern = Pattern.compile(scanner.nextLine());
			System.out.printf("Enter input string to search: ");
			Matcher matcher = pattern.matcher(scanner.nextLine());
			boolean found = false;			
			while (matcher.find()) {
				System.out.printf("I found the text \"%s\" starting at index %d and ending at index %d.%n",
						matcher.group(), matcher.start(), matcher.end());
				found = true;
			}
			if (!found) {
				System.out.printf("No match found.%n");
			}			
		}
	}
}