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Java 8 solution:
import java.util.Scanner; import java.util.regex.*;
public class Solution { public static void main(String[] args){ Scanner in = new Scanner(System.in); int testCases = Integer.parseInt(in.nextLine()); while(testCases>0){ String pattern = in.nextLine(); //Write your code try{ Pattern.compile(pattern); System.out.println("Valid"); } catch(PatternSyntaxException e) { System.out.println("Invalid"); } testCases--; } in.close(); } }
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Pattern Syntax Checker
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Java 8 solution:
import java.util.Scanner; import java.util.regex.*;
public class Solution { public static void main(String[] args){ Scanner in = new Scanner(System.in); int testCases = Integer.parseInt(in.nextLine()); while(testCases>0){ String pattern = in.nextLine(); //Write your code try{ Pattern.compile(pattern); System.out.println("Valid"); } catch(PatternSyntaxException e) { System.out.println("Invalid"); } testCases--; } in.close(); } }