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In this post, you will find the solution for Java Factory Pattern-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.
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Introduction To Java
JAVA was developed by James Gosling at Sun Microsystems Inc in the year 1991, later acquired by Oracle Corporation. It is a simple programming language. Java makes writing, compiling, and debugging programming easy. It helps to create reusable code and modular programs.
Java is a class-based, object-oriented programming language and is designed to have as few implementation dependencies as possible. A general-purpose programming language made for developers to write once run anywhere that is compiled Java code can run on all platforms that support Java. Java applications are compiled to byte code that can run on any Java Virtual Machine. The syntax of Java is similar to c/c++.
Link for the Problem – Java Factory Pattern – Hacker Rank Solution
Java Factory Pattern – Hacker Rank Solution
According to Wikipedia, a factory is simply an object that returns another object from some other method call, which is assumed to be “new”.
In this problem, you are given an interface Food. There are two classes Pizza and Cake which implement the Food interface, and they both contain a method getType().
The main function in the Main class creates an instance of the FoodFactory class. The FoodFactory class contains a method getFood(String) that returns a new instance of Pizza or Cake according to its parameter.
You are given the partially completed code in the editor. Please complete the FoodFactory class.
Sample Input 1
cake
Sample Output 1
The factory returned class Cake Someone ordered a Dessert!
Sample Input 2
pizza
Sample Output 2
The factory returned class Pizza Someone ordered Fast Food!
Java Factory Pattern – Hacker Rank Solution
import java.security.Permission; import java.util.Scanner; interface Food { public String getType(); } class Pizza implements Food { public String getType() { return "Someone ordered a Fast Food!"; } } class Cake implements Food { public String getType() { return "Someone ordered a Dessert!"; } } class FoodFactory { public Food getFood(String order) { if ("pizza".equals(order)) { return new Pizza(); } else if ("cake".equals(order)) { return new Cake(); } return null; }// End of getFood method }// End of factory class public class Solution { public static void main(String args[]) { Do_Not_Terminate.forbidExit(); try { @SuppressWarnings("resource") Scanner sc = new Scanner(System.in); // creating the factory FoodFactory foodFactory = new FoodFactory(); // factory instantiates an object Food food = foodFactory.getFood(sc.nextLine()); System.out.println("The factory returned " + food.getClass()); System.out.println(food.getType()); } catch (Do_Not_Terminate.ExitTrappedException e) { System.out.println("Unsuccessful Termination!!"); } } } class Do_Not_Terminate { public static class ExitTrappedException extends SecurityException { private static final long serialVersionUID = 1L; } public static void forbidExit() { final SecurityManager securityManager = new SecurityManager() { @Override public void checkPermission(Permission permission) { if (permission.getName().contains("exitVM")) { throw new ExitTrappedException(); } } }; System.setSecurityManager(securityManager); } }
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