CodeGym online Java course - Help

Riccardo
Level 29
Question about the task Rectangle algorithms
Java Core, Level 10, Lesson 10
Resolved
Can someone explain to me what my mistake is.The output completely matches conditions.
04.06.2023
27views
3comments
0
Alex Tor
Level 27
Question about the task CRUD
Java Core, Level 7, Lesson 10
Resolved
Please, some hint(s).Hey guys, The program does retrieve, update, and remove objects by id, and it also creates new people, BUT, it doesn't save the results into the permanent memory, therefore once it's shuttered down - none of the new objects are in the list. How to fix it? TYIA !
04.06.2023
18views
2comments
0
prince
Level 2
prothercourt oyigbo RiversState
Question about the task Amigo is very smart
Java Syntax, Level 1, Lesson 1
Under discussion
how to start java coding hi Am new here were can I start from
03.06.2023
14views
1comment
0
Anonymous #11260945
Level 4
United States of America
Question about the task Maximum of entered numbers
Java Syntax, Level 4, Lesson 2
Under discussion
program meets criteria but won't pass?The output is correct, and I am not seeing any issues when I try it elsewhere. What am I missing? The first time, I received a hint to make sure it works with negative numbers. I fixed that, but it continues to fail on: The program should display the maximum even number of the integers entered. &
30.05.2023
32views
3comments
0
Enderguyz85
Level 4
Question about the task Positive and negative numbers
Java Syntax, Level 3, Lesson 7
Under discussion
cannot find symbol error i'm just trying to declare a variable Number and it keeps doing that error |int Number = number| what's the problem there ? (error is pointed at n) please help
30.05.2023
35views
2comments
0
Andrei
Level 41
Question about the task CountDownLatch
Java Multithreading, Level 7, Lesson 9
Resolved
How is this supposed to make sense?await() - "Causes the current thread to wait until the latch has counted down to zero, unless the thread is interrupted. If the current count is zero then this method returns immediately. If the current count is greater than zero then the current thread becomes disabled for thread scheduling purpose
10.05.2021
278views
7comments
0
Lawson
Level 29
Lagos
Question about the task Cloning plants
Java Multithreading, Level 1, Lesson 8
Under discussion
Pls help I can't solve this... I keep getting " tree.clone can't be overridden"
09.09.2020
467views
4comments
0
Ana
Level 1
Under discussion
Lowest value How to find the lowest value in primitive integer array using loop?(java)
14.02.2023
75views
2comments
0
matemate123
Level 37
Kraków
Question about the task Arrange wait and notify methods
Java Multithreading, Level 7, Lesson 9
Under discussion
The program ran too long and was closed!I have question. Is there something wrong in this code or are my general assumptions correct? Program print good result and finished with exit code 0. EDIT: I added "mail.notifyAll();" in last line in run method in MailServer but still "Too long" info.
02.06.2023
26views
3comments
0
Khamdam
Level 35
Question about the task OOP: Cars
Java Core, Level 5, Lesson 2
Under discussion
Is it allowed to inherit private methods?"public static class CheapCar { private void printlnDesire()" "public static class GeoMetro extends CheapCar { public void printlnDesire()" I thought that private methods can not be inherited. Why it is written this way?
27.05.2023
34views
2comments
0
Kasia
Level 22
Zabrze
Question about the task Iterating through a file tree
Java Collections, Level 1, Lesson 2
Archived
Can't pass the first I just give up(for now anyway). It works on my machine(change the name of the resultFileAbsolutePath.txt to allFilesContent.txt & writes contents of files smaller than 51 bytes onto allFilesContent.txt ). I still can't pass the first validation point: The file passed as the second argument to
29.01.2021
440views
4comments
1
Akshay Y Shirsat
Level 7
Mumbai
Question about the task Don't think about seconds…
Java Syntax, Level 3, Lesson 8
Under discussion
how can i solve this?can anyone help me on this? i dint get the question.
10.09.2018
2997views
19comments
0
Dyrits
Level 22
Question about the task Iterating through a file tree
Java Collections, Level 1, Lesson 2
Archived
Impossible to get the first requirement right~ package com.codegym.task.task31.task3101; /* Iterating through a file tree */ import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.nio.file.Files; import java.nio.file.Paths; import java.util.*; public class Solution { public static void main(Strin
02.11.2020
304views
7comments
1
Ashish RajAnand
Level 13
Bhilai
Resolved
inside the if how instanceof work here please refer link public static void main(String[] args) { //add all robots to a list ArrayList robots = new ArrayList(); robots.add(new WorkerRobot()); robots.add(new GuardRobot()); robots.add(new WateringCan()); //build a wall if you can for (Object robot: robots) { if (robot instanc
14.05.2020
576views
4comments
1
slyyx
Level 15
New York City
Question about the task Correct class
Java Syntax, Level 11, Lesson 5
Under discussion
Both creating a nested class and creating a class in a separate file did not work Creating a nested class fails the 3rd task condition with the error: "Be sure that the program has a Cat class." Creating the Cat class in its own Cat.java file fails the 3rd task condition with the error: "Be sure the Cat class is public."
30.05.2022
230views
2comments
0
Anonymous #11349817
Level 0
Question about the task Minesweeper (Part 1/16)
Games, Level 0, Lesson 0
Resolved
Salut, s'il je ne connais pas l'endroit où on écrit les codes Java. Ça se trouve à quel position du site s'il vous plaît ?import com.codegym.engine.cell.Game; public class MySuperGame extends Game { @Override public void initialize() { // Set the field size to 7 cells x 9 cells setScreenSize(7, 9); ... } }
01.06.2023
12views
0comments
0
Justin Smith
Level 39
Greenfield, USA
Question about the task Determining locking order
Java Multithreading, Level 7, Lesson 6
Under discussion
I don't understand this task at all I looked at the previous task, and the previous lessons. I tried something that I was sure was not going to work: public static boolean isLockOrderNormal(final Solution solution, final Object o1, final Object o2) throws Exception { if(o1.hashCode() > o2.hashCode()) {
31.03.2022
441views
11comments
0
Amo programmare
Level 31
Question about the task Prevent cloning
Java Multithreading, Level 1, Lesson 8
Under discussion
In testing work fines, but won't pass the validator Hi Everyone, I came up with this solution here: @Override public Object clone() throws CloneNotSupportedException { if(this instanceof B && !(this instanceof C)) return new CloneNotSupportedException(); return super.clone(); } Duri
31.05.2023
19views
1comment
0
Wayn Adams
Level 0
Under discussion
are you looking for spell caster to help you win the lotto?Hey everyone I bring to you good news.. Have been playing lottery for years now and unable to win I even came to conclusion that I won't play lottery again, last Monday I came online and I saw a post about Dr dominion spell lottery number I doubted but decided to give a last try and I reach out to
05.01.2023
663views
25comments
25
Tomislav Varga
Level 11
Berlin
Question about the task URL validation
Java Syntax, Level 9, Lesson 5
Resolved
Wrong Execution of Solution Class Hi all, since today, every time I want to run a solution in IntelliJ, it runs a different solution class from another task that contains error. What I mean: I choose a task, write my code, want to run the code to check if it fulfills the requirement before I send the solution, then it always wants
22.04.2022
386views
3comments
0
althea
Level 1
Under discussion
hello! can you help me this one? I'm new to this Problem: One of the common computer-aided tool used during elementary days is the Roman Numerals. Roman numerals use letters instead of numbers. There are seven letters you need to know: • I = 1 • V = 5 • X = 10 • L = 50 • C = 100 • D = 500 here's the sample run SAMPLE RUN 1: --------------------------WELCOME TO THE ROMAN NUMERAL COMPUTATION------------------------------- [1] Number to Roman Numeral [2] Roman Numeral Addition [3] Roman Numeral Subtraction [4] Roman Numeral Multiplication [5] Exit Enter choice: 1 Enter a number:
07.01.2023
182views
2comments
7
LuisRC
Level 39
Gijón
Question about the task Modifiers and deadlock
Java Multithreading, Level 7, Lesson 4
Under discussion
Why sout2 must be synchronized?Hi there, I don't get why sout2 must be synchronized if it's called by sout which is already synchronized. If sout it's synchronized it means, according to my very limited knowledge, that if sout is taken it cannot be taken again because of MUTEX so sout2 neither. Thanks package com.codegym.task.ta
04.08.2022
171views
4comments
0
Anonymous #11345952
Level 14
United States of America
Under discussion
I know java very well. I only want to concentrate on classes. The previous concepts are wasting my time. Can you please change my level.I know java very well. I only want to concentrate on classes. The previous concepts are wasting my time. Can you please change my level.
25.05.2023
28views
1comment
0
Enderguyz85
Level 4
Question about the task Declare variables
Java Syntax, Level 1, Lesson 4
Under discussion
String why isn't String turning orange like int ? (the command is String (name + city); is there a problem with it ?)
25.05.2023
14views
1comment
0
Dawn( #11020889)
Level 37
Toronto
Question about the task Restaurant (part 21)
Java Multithreading, Level 9, Lesson 15
New
what's wrong?I think I did very well, but I can't go through the validation. Someone help please!
24.05.2023
26views
0comments
0
matemate123
Level 37
Kraków
Question about the task Maximum of entered numbers
Java Syntax, Level 4, Lesson 5
Resolved
Not even numbers It's very hard for me. I don't know how make that option when user don't write any even numbers. How to tell program if any x don't have x % 2 != 0 ?
14.10.2022
293views
4comments
0
Abdulaziz alshaikh
Level 0
Question about the task Triangle
Java Syntax, Level 3, Lesson 6
Under discussion
I don't see what's wrong i tried more than 2 solution the code works but requirements are not met
04.02.2023
178views
5comments
2
Micheline Peric
Level 0
Question about the task Moon Lander (Part 1/23)
Games, Level 0, Lesson 4
Under discussion
I Need A Real Spell Caster To Help Me Bring Back My Ex Lover Urgently 2023, WhatsApp +2348124644470 He Is The Best Spell Caster Online And His Result Is 100% Guaranteed.URGENT AND EFFECTIVE LOVE SPELL CASTER TO HELP YOU GET BACK YOUR EX LOVER VERY FAST WHATSAPP +2348124644470 My Name is Micheline Peric from Ireland, I want to say thank you to PRIEST WISDOM for the good thing he has done for me,Though am not sure if this is the best forum to show my joy and happin
09.02.2023
744views
2comments
22
Lionel Messiah
Level 1
Under discussion
Recovery Bitcoin is Real Loosing ones Crypto currency can be a devastating thing to experience, the fact that it is almost impossible to recover a Stolen or lost Crypto coin hurt more than anything. When a person get scammed of their money while investing in a crypto currency platform the only thing they can think of is how
19.02.2023
261views
3comments
12
Untitled by Anon
Level 34
Question about the task Tracking changes
Java Core, Level 9, Lesson 11
Resolved
Pardon the poetry. But the validator does not let me pass still.My strategy was to create copy arraylists and then insert the word "empty" to the list where an item got added or removed. The examples worked perfectly but it didn't pass the validator.
21.05.2023
64views
4comments
0

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