The getName method in the Mouse class should return "Mouse".

Question about the task

Resolved

As many hour(s) I've spent on this I simply do not understand why this is unable to reproduce 'Mouse' or any other name for that matter. Brain is racked and I'm stuck. Any help would be appreciated.

if (isWork(computer.getKeyboard()) &&
                isWork(computer.getMonitor()) &&
                isWork(computer.getMouse())) {
            System.out.println("Work!");

Seems not to be able to connect with CompItem.java appropriately though I've spent a bit of time cross referencing, etc.

1. Create the CompItem interface.
2. Add a String getName() method to it.
3. Create Keyboard, Mouse, and Monitor classes that implement the CompItem interface.
4. The getName() method must return the class name. For example, it will return "Keyboard" for the Keyboard class.
5. Create the Computer class.
6. Add a private Keyboard field keyboard to the Computer class.
7. Add a private Mouse field mouse to the Computer class.
8. Add a private Monitor field monitor to the Computer class.
9. Use the Alt+Insert key combination (on Windows) (Constructor command) to create a Computer class constructor with three parameters.
10. Inside the constructor, use the parameters to initialize all three of the class's fields (variables).
11. Create getters for the fields in the Computer (in the class, use the Alt+Insert key combination (on Windows) and select the Getter command).
12. Each class and interface should be in a separate file.

Requirements:

The CompItem interface must be in a separate file.
The CompItem interface must define a getName() method that returns a String and has no parameters.
The Keyboard, Monitor, and Mouse classes must implement the CompItem interface, and be located in separate files.
The getName method in classes implementing the CompItem interface should return a simple class name, e.g. "Keyboard" for the Keyboard class.
The Computer class must be in a separate file and have one private field of each of the following types: Keyboard, Mouse, and Monitor.
The Computer class constructor should have 3 parameters (keyboard, mouse, monitor) and correctly initialize the corresponding fields of the class.
For the Computer class's fields keyboard, mouse, and monitor, you need to create getters (getKeyboard, getMouse, getMonitor) that return the corresponding fields of the Computer class.

package com.codegym.task.task14.task1413; /* Computer */ public class Solution { public static void main(String[] args) { Computer computer = new Computer(new Keyboard(), new Mouse(), new Monitor()); if (isWork(computer.getKeyboard()) && isWork(computer.getMonitor()) && isWork(computer.getMouse())) { System.out.println("Work!"); } } public static boolean isWork(CompItem item) { System.out.println(item.getName()); return item.getName() != null && item.getName().length() > 4; } }

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Guadalupe Gagnon

Level 37 , Tampa, United States

12 February 2020, 20:04

I think .getSimpleName() is a more appropriate method than .getName(). Either that or just return the literal String that you need(eg return "Mouse").

Guadalupe Gagnon

Level 37 , Tampa, United States

12 February 2020, 20:08

Couple tips: You use different variable names in each of the classes:

// for Mouse:
String a = this.getClass().getName();
return a;
// or for Moniter its:
String b = this.getClass().getName();
return b;

This is unnecessary because they are local variables and code should have a uniform standard so you can copy+paste to speed up the development process. Also, in those same code snippets, the 'this' keyword is not necessary because there is no naming conflicts or you are not returning the object. you can use just:

String a = getClass().getSimpleName();

Though, imo, I think it would be better to just have one line in the method:

return getClass().getSimpleName();

Thomas Sixberry

Level 16 , Rochester Hills, United States

12 February 2020, 20:28

Thank you for that! I figured it had to be something easy that I missed ~ it seems like at times the bugs crawl into my head and my thinking capacity goes out the window. Much needed breaks on this set of 13 tasks for Level 4!