Honestly at a lose here and not even sure if I really completely understand my own code

Question about the task

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I hate to admit but I got my sun, moon, and earth code almost directly from a website and I filled in the code for the solution.java and it seems most of it has worked but I haven't a clue what to do to get this last task to pass. Any help/explanation into what exactly I need to do would be greatly appreciated. Thanks in advance for your time. Also on the site it is showing that there are three that didn't not pass but in Intellij IDEA the only one that didn't pass was "The readKeyFromConsoleAndInitPlanet method must correctly update the value of the variable thePlanet according to the task conditions." so the inconsistencies leave me a bit unsure what is really going on. The recomendation from this error says "If the input string is "moon", assign the corresponding object to the variable thePlanet."

1. Find an example of the singleton pattern used for lazy initialization. Use your favorite search engine (such as Google).
2. In separate files, create three singleton classes in its likeness and image: Sun, Moon, and Earth.
3. Implement the Planet interface in the Sun, Moon, and Earth classes.
4. In Solution class's static block, call the readKeyFromConsoleAndInitPlanet method.
5. Implement the readKeyFromConsoleAndInitPlanet method:
5.1. Read one String value from the console.
5.2. If the value is equal to one of the Planet interface's constants, create a corresponding object and assign it to Planet thePlanet, otherwise set the Planet thePlanet to null.

Requirements:

The Sun class should prevent Sun objects from being created outside the class.
The Sun class must have a private static Sun field named instance.
The Sun class must implement the public static getInstance method, which returns the value of the field instance.
The Sun class's getInstance method must ALWAYS return the same object.
The field instance must be initialized after the first call to the getInstance method, but not before.
The Moon class should prevent Moon objects from being created outside the class.
The Moon class must have a private static Moon field instance.
The Moon class must implement the public static getInstance method, which returns the value of the field instance.
The Moon class's getInstance method must ALWAYS return the same object.
The field instance must be initialized after the first call to the getInstance method, but not before.
The Earth class should prevent Earth objects from being created outside the class.
The Earth class must have a private static Earth field instance.
The Earth class must implement the public static getInstance method, which returns the value of the field instance.
The Earth class's getInstance method must ALWAYS return the same object.
The field instance must be initialized after the first call to the getInstance method, but not before.
The readKeyFromConsoleAndInitPlanet method must be called in the Solution class's static block.
The readKeyFromConsoleAndInitPlanet method should read one line from the keyboard.
The readKeyFromConsoleAndInitPlanet method must correctly update the value of the variable thePlanet according to the task conditions.
The Sun, Moon and Earth classes must be in separate files.

package com.codegym.task.task15.task1522; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; /* Reinforce the singleton pattern */ public class Solution { public static void main(String[] args) { } public static Planet thePlanet; static { readKeyFromConsoleAndInitPlanet(); } public static void readKeyFromConsoleAndInitPlanet() { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); try { String s = reader.readLine(); if (s == "sun") { thePlanet = Sun.getInstance(); } else if (s == "moon") { thePlanet = Moon.getInstance(); } else if (s == "earth") { thePlanet = Earth.getInstance(); } } catch (IOException e) { System.out.println(e); } } }

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Montjoie

Level 22 , Cologne, Germany

11 September 2019, 21:22

solution

You should rethink your way how to compare Strings ;-) https://codegym.cc/groups/posts/equals-and-string-comparsions

Jason

Level 26 , Rancho Cucamonga, United States

11 September 2019, 22:51

UGH!!!! ha ha ha I feel like such an ass.... Thank you so much lol I can't believe I just did that. You're #1 in my book :D