Really Confused

Question about the task

Bridges

Java Core, Level 4, Lesson 8

Under discussion

I'm getting a error on my Solutions Bridge call. I don't know what to do. Your help is appreciated.

1. Create a Bridge interface with an int getCarsCount() method.
2. Write WaterBridge and SuspensionBridge classes that implement the Bridge interface.
3. The getCarsCount() method must return any constant int value.
4. The getCarsCount() method must return different values for different classes.
5. Create a public println(Bridge bridge) method in the Solution class.
6. In the println method, display the result of calling getCarsCount() method on the bridge object.
7. Each class and interface must be in separate files.

Requirements:

The Bridge interface must be in a separate file.
The WaterBridge and SuspensionBridge classes must be in separate files.
The WaterBridge and SuspensionBridge classes must implement the Bridge interface.
The getCarsCount() method must return different int values for different classes, but always the same value for different objects of the same class.
The Solution class must implement a public println method with one Bridge parameter.
The println method must display the number of cars (result of the getCarsCount method) for the passed Bridge object.
The Bridge interface must define an int GetCarsCount() method.

package com.codegym.task.task14.task1409; /* Bridges */ public class Solution { public static void main(String[] args) { println(new WaterBridge()); println(new SuspensionBridge()); } public static void println(Bridge bridge) { int c = bridge.getCarsCount(); System.out.println(c); } public static void println(WaterBridge waterBridge) { int c =waterBridge.getCarsCount(); System.out.println(c); } public static void println(SuspensionBridge suspensionBridge) { int d =suspensionBridge.getCarsCount(); System.out.println(d); } }

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Darek

Level 41 , Katowice, Poland

3 August 2020, 17:27

In interface Bridge, the getCArsCount () method returns nothing. In the SuspensionBridge classes, the WaterBridge methods of getCarsCount () must be public. They return a value. The int getCarsCount () methods should be @Override as they are meant to override this method. In Solution, in the println method I gave: String result = bridge.getCarsCount () + ""; System.out.println (result); I passed the validation.

Guadalupe Gagnon

Level 37 , Tampa, United States

3 August 2020, 16:47

The first problem is with the interface. Interfaces can declare methods, but will not have method bodies. The task specifically says that the declared method in the Bridge class should be: int getCarsCount() However I see in this code: public static int getCarsCount() This will need to be fixed as well as the interface method having an illegal body (the open and closing curly brackets and code in between). The next problem is lines 20-27. I don't see where the task instructions say to add these. They should be removed.