Page 56 | CodeGym online Java course - Help

public enum WaysToDie
Level 23
Denver
Question about the task GCD
Java Core, Level 4, Lesson 8
Resolved
Exception problem I don't know what I am doing wrong, it seems like if the numbers end up being negative that the program will throw the exception. But I am still failing the tests.
12/27/21
475views
1comment
0
HeavenlyDestroyer
Level 41
Yekaterinburg
Question about the task Number algorithms
Java Core, Level 10, Lesson 10
Under discussion
Any hints?I don't really understand why it is not verifying anything. It is compiling all right, and the output seems correct.
12/6/21
678views
4comments
0
Yiheng Niu
Level 26
Beijing
Question about the task Refactoring Rectangle
Java Multithreading, Level 4, Lesson 4
Resolved
Get right output, but cannot pass the 5th and 6th condition. Need help please.The 5th and 6th condition got me so confused. Can you help me with this please? Any help will be appreciated!
4/5/20
1235views
4comments
1
HeavenlyDestroyer
Level 41
Yekaterinburg
Question about the task Inverted words
Java Multithreading, Level 2, Lesson 9
Resolved
Can I have some guidance?My code seems to work but the last condition is not verifying. Thx in advance!
12/24/21
593views
0comments
0
Liliane Top
Level 24
Amsterdam
Question about the task Find the bugs
Java Core, Level 10, Lesson 10
Resolved
Confused the validation confuses me.My understanding is as follows: 1) If you implement the interface Serializable then there are a couple of things required: a) Override the readObject(ObjectInputStream in) method is this true? I previous tasks this was not the case b) Override the writeObject(ObjectOutputStream out) method is this t
1/17/21
784views
4comments
1
Onar D.
Level 7
Question about the task Task about algorithms
Java Syntax, Level 5, Lesson 12
Under discussion
why task condition not pass maximum from N numbers?code is working. where in mistake? or what i missed?
10/5/21
818views
1comment
0
BigMan99
Level 15
Jacksonville
Question about the task Correct class
Java Syntax, Level 11, Lesson 5
Under discussion
What am I doing wrong? The solutions works fine.Anyone know what I am doing wrong> The code works fine in eclipse.
12/24/21
534views
1comment
0
Arjun Kiruthivasan
Level 14
Chennai
Question about the task A fox is an animal
Java Core, Level 3, Lesson 4
Under discussion
How to solve this question??1. Make the Fox class implement the Animal interface. 2. Edit the code so that the getName method is the only method in the Fox class. 3. Don't create additional classes or delete any methods! Requirements: 1. The Fox class must implement the Animal interface. 2. The Fox class must only implement
4/24/19
2412views
10comments
0
Alexandre Desbois
Level 10
Chamarandes-Choignes
Question about the task R or L
Java Syntax, Level 7, Lesson 9
Under discussion
NullPointerException My list is apparently empty, but I don't understand why...
12/24/21
509views
1comment
0
Gellert Varga
Level 23
Szekesfehervar
Resolved
Serializable and the no-args constructor 1.) Why does this program work without the no-args constructor? I read somewhere that if you write readObject and writeObject methods in a descendant class, you need a no-args constructor in the parent class. Elsewhere I read that if you want to serialize a (serializable) class whose parent is not s
12/21/21
1532views
4comments
0
MaGaby2280
Level 41
Guatemala City
Question about the task How to avoid Copy+Paste
Java Multithreading, Level 4, Lesson 6
Resolved
Advise on the fifth condition! If someone could give me some advise... I cannot pass the fifth condition. I have trying for days and cannot find the bug. Thank you!
8/4/20
649views
3comments
1
Alexandre Desbois
Level 10
Chamarandes-Choignes
Question about the task R or L
Java Syntax, Level 7, Lesson 9
Under discussion
Error with compilation that I don't get I don't get what intelliJ is telling me : Exception in thread "main" java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:911) at java.util.ArrayList$Itr.next(ArrayList.java:861) at com.codegym.task.task07.task0716.Solution.fix(Solution.java
12/23/21
887views
1comment
0
Alexandre Desbois
Level 10
Chamarandes-Choignes
Question about the task Words in reverse
Java Syntax, Level 7, Lesson 9
Under discussion
Why my code doesn't compile ?I guess I am wrong with this part: System.out.println(list.get(list.size() - i)); The whole code: public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); ArrayList list =
12/23/21
390views
1comment
0
Alexandre Desbois
Level 10
Chamarandes-Choignes
Question about the task Ascending numbers
Java Syntax, Level 6, Lesson 11
Under discussion
Why not j = i + 1 ?Why is it int j = i and not int j = i + 1 like that : for (int j = i + 1; j < array.length; j++) I ran the program with int j = i + 1, and it works, but I don't understand why it also works with int j = i (because we would compare the same element in the array? array[0] with array[0] instead
12/22/21
654views
4comments
0
Filip
Level 4
Karlovac
Question about the task Display right away
Java Syntax, Level 3, Lesson 3
Resolved
add public static void printString(String s) method Hi, i need help with "Hello, Amigo!"??
11/13/18
5272views
7comments
0
Justin Smith
Level 41
Greenfield, USA
Question about the task Snake (part 11)
Java Multithreading, Level 2, Lesson 18
Under discussion
CreateMouse method not validating This seems like very basic stuff, but I can't figure out why it won't accept my code.
12/21/21
610views
5comments
0
Tian Pro
Level 23
Cape Town
Question about the task Find the bugs
Java Core, Level 10, Lesson 10
Resolved
But it's working!? Why the last condition STILL not verified?I'm pretty darn frustrated with this one to be quite honest >.< Ended up taking the advice from the other help answers but for some reason it still doesn't verify. Anyone know what's missing? :'D
2/27/20
1866views
13comments
1
public enum WaysToDie
Level 23
Denver
Question about the task Greater than 10? You're not a good fit for us
Java Syntax, Level 14, Lesson 7
Resolved
Por que esta?So my code seems to fulfill all the requirements yet it is still failing.
12/21/21
731views
3comments
0
Grzegorz
Level 9
Question about the task 2048 (Part 4/18)
Games, Level 0, Lesson 2
Under discussion
how can I run the code before verifytask in IDEA s
12/21/21
849views
9comments
0
Luniae
Level 2
Stuttgart
Question about the task Our first converter!
Java Syntax, Level 2, Lesson 2
Resolved
Question about the converter task Hello everyone, i have a question about the converter task. I'd like to know if casting the double type like this is another possible way like writing 9/5.0 public static double convertCelsiusToFahrenheit(int celsius) { //write your code here double TF = (double)9/5 * celsius + 3
4/2/21
904views
2comments
1
Johannes
Level 27
Centurion, Pretoria
Question about the task Minimum changes
Java Core, Level 10, Lesson 10
Under discussion
Can someone please explain to me why the constructor of the B and C class is calling Super(name) ?I am confused again. I am not modifying the parent class if I instantiate a new B or C class ? C c = new C ("Peter"); (Why would I want to pass that name to the Parent or Base (super) class ? What on earth is achieved by doing that ?) Thanks for your attention ;)
4/22/20
830views
1comment
0
Alexis M
Level 18
France
Question about the task Minesweeper (Part 6/16)
Games, Level 0, Lesson 0
Under discussion
countMineNeighbors () est un problème Bien le bonjour! Quelqu'un peut m'éclairer sur mon erreur ? Je n'arrive pas a faire rouler la méthode countMineNeighbors (). Ca compile bien mais la task ne veut pas se valider... Merci d'avance :)
12/18/21
626views
1comment
0
public enum WaysToDie
Level 23
Denver
Question about the task Minimum of three numbers
Java Syntax, Level 7, Lesson 4
Resolved
Same problem different problem.Again my code is producing the expected output but it continues to fail. Where have I gone wrong?
12/18/21
441views
2comments
0
Angel Stefan
Level 23
Sibiu
Question about the task Number of letters
Java Syntax, Level 10, Lesson 11
Resolved
but still... :D I realy don t know what to do anymore! This code do the job but still... :D Any hints? Tk you!
12/9/21
703views
20comments
0
Grzegorz
Level 9
Question about the task Snake (Part 7/20)
Games, Level 0, Lesson 1
Under discussion
need help three task are not passed
12/15/21
599views
1comment
0
Anonymous #10843241
Level 14
Bentonville
Under discussion
level 11 lesson 6 first task - Pls help me understand why type casting needed In below example why should I type cast " CellPhone cellPhone = (CellPhone) o;" instead of directly accessing "Objects.equals(vendor, o.vendor) && Objects.equals(model, o.model);" ?. When I use "o." it gives oblect not found though its passed as part of parameter.
12/13/21
565views
3comments
0
Romain
Level 26
Paris
Question about the task Make a word chain
Java Multithreading, Level 2, Lesson 9
Under discussion
'if possible' in 7th requirement What does mean "if possible" in the 7th requirement ? Should we delete all word without any correspondence with the first or last letter of the others words ?
3/25/21
1090views
7comments
0
Justin Smith
Level 41
Greenfield, USA
Question about the task Find a substring
Java Multithreading, Level 2, Lesson 5
Under discussion
can't get last condition I've tested with numerous strings of different lengths and different numbers of spaces, empty string, null. All of them either produce a substring that matches the requirement (with no leading or trailing spaces), or throws the required exception. There is one situation where the conditions aren't
12/12/21
781views
3comments
0
Szymon
Level 41
Warsaw
Question about the task Log parser (part 1)
Java Collections, Level 7, Lesson 15
New
I need help guys .
12/13/21
621views
0comments
0
Gellert Varga
Level 23
Szekesfehervar
Resolved
Serialisation in a custom code example -- NotActiveException I wanted to try and test a lot of things about serialization/deserialization with a made-up code, just for myself. Unfortunately, I got stuck at the very beginning. Here is the code: import java.io.*; public class Solution implements Serializable { // private int age; private int wei
12/9/21
945views
10comments
0

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