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

Pattern Syntax Checker

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397 Discussions

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  • anushkabhandare1
     + 0 comments

    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(); } }

  • Damian_GDO_92
     + 0 comments
    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();
            
            try {
                Pattern.compile(pattern);
          	    System.out.println("Valid");
            } catch (PatternSyntaxException exc) {
                System.out.println("Invalid");
            }
            
            testCases--;
		}
        
        in.close();
	}
}

  • yashdeora98294
     + 0 comments

    Here is Pattern Syntax Checker solution in Java - https://programmingoneonone.com/hackerrank-pattern-syntax-checker-solution-in-java.html

  • vitalii_iandulov
     + 0 comments
    public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int cnt = scan.nextInt();
    scan.nextLine();
    for (int i = 0; i < cnt; i++){
        try{
            Pattern.compile(scan.nextLine());
        } catch (Exception e){
            System.out.println("Invalid");
            continue;
        }
        System.out.println("Valid");
    }
    scan.close();
}

  • TANMAY_RAJESH_M1
     + 0 comments

    Java 8

    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 p = Pattern.compile(pattern);
                System.out.println("Valid");
            }catch(Exception e){
                System.out.println("Invalid");
            }
            testCases--;
            
		}
	}
}