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Question about the task

Bridges

Java Core, Level 4, Lesson 8

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I don't know why it is not verified...

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 b) { System.out.println(b.getCarCount()); }// Add println method here } interface Bridge{ public int getCarCount(); } class WaterBridge implements Bridge{ public int getCarCount(){ return 10; } } class SuspensionBridge implements Bridge{ public int getCarCount(){ return 102; } }

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- FniJnn -

Level 33 , Paris, France

8 January 2020, 20:04

First of all, the method must be called getCarsCount() and not getCarCount(). Then, you need to put each class and interface in a different folder.

Anthony Chalk

Level 30 , London, United Kingdom

25 December 2019, 13:17

The bridge interface and classes should be in separate files. Assuming you're using IntelliJ, open up the project menu on the left hand side, Right click on folder 1409 Select - new - Java Class Select - Interface - call it Bridge Do the same for the classes (obviously select Class instead of Interface)