- Check errors and revise/update this java code below andupdate with OOp class; at least make two classes, use java library,validate user input, format and create UML/Pseudocode and flowchartfor the code.
import java.util.Scanner;
public class TestScore
{
   public static void main(String[] args) {
       String firstName;
       String lastName;
       int numTest;
       int i;
       int score;
       double totalScore;
       double avgScore;
       String grade;
       Scanner input = newScanner(System.in);
       System.out.println(\"EnterFirst Name\");
       firstName =input.nextLine();
       System.out.println(\"EnterLast Name\");
       lastName =input.nextLine();
       System.out.println(\"Howmany test score do you want to enter: \");
       numTest =input.nextInt();
       while(!input.hasNextDouble())
       {
           numTest= input.nextInt();
           System.out.println(\"Invalidentry, try again\");
       }
       totalScore = 0;
       for (i = 0; i <=numTest - 1; i++) {
           score= input.nextInt();
           totalScore= totalScore + score;
       }
       avgScore = totalScore/ numTest;
       if (avgScore >= 90){
           grade= \"A\";
       } else {
           if(avgScore >= 80) {
               grade= \"B\";
           }else {
               if(avgScore >= 75) {
                   grade= \"C\";
               }else {
                   if(avgScore >= 50) {
                       grade= \"D\";
                   }else {
                       grade= \"F\";
                   }
               }
           }
       }
       System.out.println(firstName+ \" \" + lastName + \" \" + avgScore + \" \" + grade);
   }
}
