JavaAnnotations.java

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

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();
 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(spend <= budgetLimit){
 method.invoke(FamilyMember.class.newInstance(),
 budgetLimit, spend);
 }else{
 System.out.println("Budget Limit Over");
 }
 }
 }
 }
 } catch (Exception e) {
 e.printStackTrace();
 }
 testCases--;
 }
 }

 private static class FamilyMember {
 @FamilyBudget(userRole="SENIOR")
 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));
 }
 }

 @Target(ElementType.METHOD)
 @Retention(RetentionPolicy.RUNTIME)
 private @interface FamilyBudget {
 String userRole() default "GUEST";
 int budgetLimit() default 100;
 }
}