In this HackerRank Java Annotations problem in java programming Based on the user role, you have to call the appropriate method in the FamilyMember class. If the amount of money spent is over the budget limit for that user role, it prints Budget Limit Over.

Your task is to complete the FamilyBudget annotation and the FamilyMember class so that the Solution class works perfectly with the defined constraints.


HackerRank Java Annotations problem solution


HackerRank Java Annotations problem solution.

import java.lang.annotation.*;
import java.lang.reflect.*;
import java.util.*;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@interface FamilyBudget {
   String userRole() default "GUEST";
   int budgetLimit() default 0;
    
}

class FamilyMember {
   @FamilyBudget(userRole = "SENIOR", budgetLimit = 100)
   public void seniorMember(int budget, int moneySpend) {
      System.out.println("Senior Member");
      System.out.println("Spend: " + moneySpend);
      System.out.println("Budget Left: " + (budget - moneySpend));
   }
 
   @FamilyBudget(userRole = "JUNIOR", budgetLimit = 50)
   public void juniorUser(int budget, int moneySpend) {
      System.out.println("Junior Member");
      System.out.println("Spend: " + moneySpend);
      System.out.println("Budget Left: " + (budget - moneySpend));
   }
}

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 role = in.next();
         int spend = in.nextInt();
         try {
            Class annotatedClass = FamilyMember.class;
            Method[] methods = annotatedClass.getMethods();
            for (Method method : methods) {
               if (method.isAnnotationPresent(FamilyBudget.class)) {
                  FamilyBudget family = method
                        .getAnnotation(FamilyBudget.class);
                  String userRole = family.userRole();
                  int budgetLimit = family.budgetLimit();
                  if (userRole.equals(role)) {
                     if(budgetLimit >= spend){
                        method.invoke(FamilyMember.class.newInstance(),
                              budgetLimit, spend);
                     }else{
                        System.out.println("Budget Limit Over");
                     }
                  }
               }
            }
         } catch (Exception e) {
            e.printStackTrace();
         }
         testCases--;
      }
   }
}


Second solution in java8 programming.

import java.lang.annotation.*;
import java.lang.reflect.*;
import java.util.*;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@interface FamilyBudget {
   String userRole() default "GUEST";
   int roleLimit() default 200;
}

class FamilyMember {
   @FamilyBudget(userRole = "SENIOR", roleLimit=100)
   public void seniorMember(int budget, int moneySpend) {
      System.out.println("Senior Member");
      System.out.println("Spend: " + moneySpend);
      System.out.println("Budget Left: " + (budget - moneySpend));
   }

   @FamilyBudget(userRole = "JUNIOR", roleLimit=50)
   public void juniorUser(int budget, int moneySpend) {
      System.out.println("Junior Member");
      System.out.println("Spend: " + moneySpend);
      System.out.println("Budget Left: " + (budget - moneySpend));
   }
}

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 role = in.next();
         int spend = in.nextInt();
         try {
            Class annotatedClass = FamilyMember.class;
            Method[] methods = annotatedClass.getMethods();
            for (Method method : methods) {
               if (method.isAnnotationPresent(FamilyBudget.class)) {
                  FamilyBudget family = method
                        .getAnnotation(FamilyBudget.class);
                  String userRole = family.userRole();
                  int budgetLimit = family.roleLimit();
                  if (userRole.equals(role)) {
                     if(budgetLimit>=spend){
                        method.invoke(FamilyMember.class.newInstance(),
                              budgetLimit, spend);
                     }else{
                        System.out.println("Budget Limit Over");
                     }
                  }
               }
            }
         } catch (Exception e) {
            e.printStackTrace();
         }
         testCases--;
      }
   }
}