JavaAnnotations.java

import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
import java.util.Scanner;
import java.lang.annotation.ElementType;
import java.lang.annotation.RetentionPolicy;


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

  int budgetLimit();
}

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 JavaAnnotations {

  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();
      in.close();
      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--;
    }
  }
}