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  1. Prepare
  2. Java
  3. Strings
  4. Pattern Syntax Checker
  5. Discussions

Pattern Syntax Checker

  • geethikanavya48
     + 0 comments

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

    public class Solution {

    public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int testCases = sc.nextInt(); // Number of test cases
    sc.nextLine(); // Consume the newline character

    for (int i = 0; i < testCases; i++) {
        String pattern = sc.nextLine(); // Input regex pattern
        try {
            Pattern.compile(pattern); // Attempt to compile the pattern
            System.out.println("Valid");
        } catch (PatternSyntaxException e) {
            System.out.println("Invalid");
        }
    }
}

    }