Create PatternSyntaxChecker.java

Author: AD9000

Regex/PatternSyntaxChecker.java

@@ -0,0 +1,36 @@
+// Author: Atharv Damle
+// Check if a regex (regular expression) is valid.
+// Full Question: https://www.hackerrank.com/challenges/pattern-syntax-checker/problem
+
+import java.util.Scanner;
+import java.util.regex.*;
+
+public class PatternSyntaxChecker
+{
+	public static void main(String[] args){
+  
+		Scanner in = new Scanner(System.in);
+    
+		int testCases = Integer.parseInt(in.nextLine());
+    while(testCases>0){
+    
+      // Accept the pattern as input.
+			String pattern = in.nextLine();
+      try
+      {
+          // Load the pattern. Try to create a Pattern object. If it fails, an error will be raised.
+          Pattern.compile(pattern);
+          System.out.println("Valid");
+      }
+      catch (Exception e)
+      {
+          System.out.println("Invalid");
+      }
+
+      testCases--;
+		}
+	}
+}
+
+
+