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Level 19

Gagret

3/3/19
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Everything is looking good but throwing error during verification

Question about the task

Currencies

Java Core, Level 4, Lesson 8

Resolved

Expand the program's ability to manipulate currencies.

1. Create a private double field amount in the abstract Money class.
2. Create a public getter for the field amount (public double getAmount()) so you can access it outside the Money class.
3. In the separate files, create Euro, Ruble, and USD classes, which will be descendants of the Money class.
4. In the Euro, Ruble, and USD classes, implement the getCurrencyName method, which will return the abbreviated name of the currency (String) (EUR, RUB, USD).
5. In the Euro, Ruble, and USD classes, implement a public constructor that takes one argument and calls the constructor of the base class (super class) with this argument.
6. Populate the allMoney list with all possible currency objects in accordance with the task conditions and the functionality of the program.

Requirements:

The Money class must have a private double field amount.
The Money class must implement a public constructor with one double parameter, which sets the variable amount to the passed parameter.
The Money class must implement a public getAmount method that returns the value of the field amount.
The Euro, Ruble, and USD classes must be descendants of the Money class and be located in separate files.
The Euro, Ruble and USD classes must implement the getCurrencyName method.
The getCurrencyName method must return the abbreviated name of the corresponding currency (String).
The Euro, Ruble, and USD classes must implement a public constructor with one double parameter. This constructor must set the value of the Money class's field amount by calling the parent class's constructor with the same argument.

package com.codegym.task.task14.task1417; public class USD extends Money { // Double amount ; public USD(Double amount){super(amount);} private String abbribate = "USD"; //public double getAmount(){return amount;} //public String getCurrencyName(){ return getClass().getSimpleName(); } public String getCurrencyName(){ return abbribate; } }

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Guadalupe Gagnon

Level 37 , Tampa, United States

4 March 2019, 16:21

You code seems to work just fine, must be something with the flexibility of the verification system. Try these in order: #1 Change the order of the currencies added to the allMoney list (on lines 26-28). Right now you have them being entered in order of USD, Euro, and RUB. Change this to Euro, RUB, and USD. #2 In each of the sub classes try removing the private String abbribate, and just return the Sting itsefl, for example:

public String getCurrencyName() {
    return "EUR";
}

I think #2 is going to be your solution, but try them both out and see if this gets the solve.

Santosh Kumar

Level 19 , Gagret, India

4 March 2019, 16:46

still it didn't passed the verifaction..after made changes you suggested Paul has a stash of 79.7 EUR Paul has a stash of 83.0 RUB Paul has a stash of 95.3 USD public Euro(Double amount){super(amount);} public String getCurrencyName(){return "EUR";} allMoney.add(new Euro(79.7)); allMoney.add(new Ruble(83.0)); allMoney.add(new USD(95.3));

Guadalupe Gagnon

Level 37 , Tampa, United States

4 March 2019, 17:44

did you change the Rub and USD classes to match the EUR class?

Santosh Kumar

Level 19 , Gagret, India

5 March 2019, 05:51

yes public class Ruble extends Money { public Ruble(Double amount){super(amount);} public String getCurrencyName(){return "RUB";} } public class USD extends Money { public USD(Double amount){super(amount);} public String getCurrencyName(){ return "USD"; } }

Guadalupe Gagnon

Level 37 , Tampa, United States

5 March 2019, 14:23

I cant find any problems with your code, it is almost identical to my solve. Try to reset the task and do it again. You haven't typed in that much and you can just copy and paste the code from this question into IntelliJ.

Santosh Kumar

Level 19 , Gagret, India

5 March 2019, 14:58

Not only IntelliJ but codegym IDE also throwing error for same code...

Guadalupe Gagnon

Level 37 , Tampa, United States

5 March 2019, 15:10

reset it

Santosh Kumar

Level 19 , Gagret, India

5 March 2019, 15:58

Hello Guadalupe, I just come to know what was the issue . I write Double d capital so I think it is creating object not datatype ................it works after mentioning double.

Santosh Kumar

Level 19 , Gagret, India

5 March 2019, 15:59

Thanks for your help and time.

Guadalupe Gagnon

Level 37 , Tampa, United States

5 March 2019, 18:32

Good solve!!..... I didn't even notice that.