Eclipse 注册类
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("Found \"%s\" starting index %d ending index %d.%n", matcher.group(), matcher.start(), matcher.end()); found = true; } if (!found) { System.out.printf("No match found.%n"); } } }}?