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Hot
Sajjad Ahmed
Level 10
Bangalore
Question about the task
Longest string
Java Syntax
,
Level 7
,
Lesson 6
Under discussion
Task is giving expected result but validation s failing can you help
public class Solution { private static ArrayList strings; static int c_len = 0, o_len = 0; public static void main(String[] args) throws Exception { strings = new ArrayList<>(); ArrayList index = new ArrayList<>(); for (int i = 0; i < 5; i++) {
20.01.2022
337
views
6
comments
0
Sara
Level 23
Maribor
Question about the task
Replacing numbers
Java Core
,
Level 9
,
Lesson 11
Archived
Help please
I have no idea what am I doing wrong. The output is exactly the same as in the example when I test the code. I had to miss something… I tried without the try, catch statements in the main method, but it still doesn't verify. I also tried without the method correctLine(String line) and put all the co
13.07.2019
1589
views
3
comments
0
Justin Smith
Level 41
Greenfield, USA
Question about the task
Snake (part 17)
Java Multithreading
,
Level 2
,
Lesson 18
Under discussion
Code seems functionally the same as solution but won't pass validation
Pasting it here so you don't have to find it in the attached code: public void move(int x, int y) { SnakeSection head = new SnakeSection(this.getX() + x, this.getY() + y); checkBorders(head); checkBody(head); if(isAlive()) { this.sections.
24.12.2021
264
views
1
comment
0
Henrique
Level 41
São Paulo
Question about the task
Census
Java Syntax
,
Level 8
,
Lesson 8
Under discussion
If the KEY must be unique, why does it ask to check if people have the same last name (which is the key)?
I was able to solve this task only when I changed the last names (map keys), so they were all different from each other. So why does the task ask to check if people have the same last name, if for the last name to be the same, the key must also be the same? I'm really confused here. Does somebody
11.05.2020
542
views
5
comments
1
Nicole Gottschall
Level 23
Germany
Question about the task
Chess board
Java Syntax
,
Level 6
,
Lesson 5
Resolved
Why doesn't my solution pass the verification even though it works as it should?
I ran the program and it outputs the same as the example in the task condition. However, it doesn't pass the verification. More precisely it is wrong for number 3. and 4. Am I missing something else? Looking forward to your help!
26.01.2022
301
views
1
comment
0
Giorgio Verzicco
Level 26
Cerignola
Question about the task
Counting words
Java Core
,
Level 9
,
Lesson 5
Resolved
Last task fails even if is correct
Tested on a real file, works correctly, but keeps failing "The program must output to the console the number of times the word "world" appears in the file." package com.codegym.task.task19.task1907; /* Counting words */ import java.io.BufferedReader; import java.io.FileReader; import java.io.IO
26.01.2022
389
views
2
comments
0
LuisRC
Level 39
Gijón
Question about the task
LinkedList and ArrayList
Java Syntax
,
Level 14
,
Lesson 5
Under discussion
About return statement
Hi there, Solving this task I found that in the Object Method there's no return type declaration and that puzzles me. Is it or is not compulsory declare the returning type in a Method? public static Object createArrayList() { //write your code here List arrayList = new ArrayList&l
26.01.2022
480
views
1
comment
0
TheLordJackMC
Level 39
Princeton
Question about the task
Aggregator (part 13)
Java Collections
,
Level 8
,
Lesson 15
Under discussion
errors
i downloaded the right solution and it matched my original one several times, but every time i run it i gives me this: class, interface, or enum expected. file com/codegym/task/task28/task2810/view/backup.htmlSolution.java, line 1, position 0 class, interface, or enum expected. file com/codegym/task
13.08.2021
412
views
2
comments
0
Justin Smith
Level 41
Greenfield, USA
Question about the task
Refactoring (part 9)
Java Multithreading
,
Level 5
,
Lesson 16
Resolved
I deleted a method and need to get it back to pass validation
Note: At the time of writing, CodeGym is attaching the wrong task code (for task 2909, which has something to do with cars). I don't know why this is. Other questions on this help page are also showing code for task 2909 but the comments don't seem to reflect that, so I suspect it's a temporary glit
24.01.2022
415
views
3
comments
0
saurabh
Level 17
Bangalore
Question about the task
Display right away
Java Syntax
,
Level 3
,
Lesson 3
Under discussion
how to do it in intellij..
I have set up the intellij... it has 3 subfolders under CodeGym Tasks...
07.10.2018
1982
views
2
comments
0
Anon#10923148
Level 9
Question about the task
Quadrants
Java Syntax
,
Level 3
,
Lesson 8
Resolved
what is this for?
is there any way to explain what kind of problem this solves?
23.01.2022
346
views
3
comments
0
Brentachii
Level 13
United States of America
Question about the task
Calculator
Java Syntax
,
Level 11
,
Lesson 4
Resolved
why won't the percentage take my answer when it works?
I've tried these several different ways that displayed properly but it won't take it and says it's wrong. any help would be appreciated, thanks.
24.01.2022
643
views
7
comments
0
Mary Khan
Level 23
Russia
Question about the task
Is anyone there?
Java Syntax
,
Level 6
,
Lesson 8
Under discussion
Why verification of my code is failed?
Why did my code verification fail?
23.01.2022
392
views
2
comments
0
school
Level 1
Ramsgate
Question about the task
Minesweeper (Part 3/16)
Games
,
Level 0
,
Lesson 0
Under discussion
memes
mems
04.02.2021
311
views
0
comments
0
Anon#10923148
Level 9
Question about the task
Favorite board games
Java Syntax
,
Level 8
,
Lesson 2
New
BoardGame class
So it seems like in this task we are filling the collection array with 5 different strings. Why do we need code to the BoardGame class?
24.01.2022
364
views
0
comments
0
Gellert Varga
Level 23
Szekesfehervar
Resolved
Enum StandardOpenOption and StandardCopyOption
1.) Enum StandardOpenOption: What is the difference between CREATE and CREATE_NEW? 2.) import static java.nio.file.StandardCopyOption.REPLACE_EXISTING; Will it import only one static variable? (Till now, I've only ever seen the whole class imported in all cases.) Is it obligatory to use "static
21.01.2022
294
views
4
comments
0
y-meyer2
Level 28
Germany
Question about the task
Synchronized methods
Java Core
,
Level 7
,
Lesson 10
Under discussion
Why don´t you need to use volatile on "param" or "sb" ?
If you use this class with several threads then the param and sb should also be marked as volatile or am i wrong?? private double param = Math.random(); private StringBuilder sb = new StringBuilder();
23.01.2022
230
views
1
comment
0
Ajani
Level 16
Jacksonville
Question about the task
Five winners
Java Syntax
,
Level 8
,
Lesson 11
Under discussion
Just makin sure your aware the sort code needs to able to sort more than just the 20 it asks for.
Behold code that one hundred percent solves what it's asking for but doesn't sort arrays of a size different than 20.
23.01.2022
310
views
1
comment
0
LuisRC
Level 39
Gijón
Question about the task
The largest number
Java Syntax
,
Level 13
,
Lesson 2
Under discussion
Failed task
Hi there, Why my solution has failed to pass the validation?
21.01.2022
403
views
6
comments
0
fullTimeAdventurer
Level 27
Chemnitz
Question about the task
Minesweeper (Part 6/16)
Games
,
Level 0
,
Lesson 0
Resolved
It looks like you counted the number of adjacent mines for a cell that is a mine — don't do that.
Hallo liebes CodeGym Team, ich versuche das Feld ohne Miene durch folgenden Schritt zu bestimmen. // Feld ohne Miene bestimmen if (!gameField[y][x].isMine) Danach die Nachbarfelder auf Mienen prüfen und den Wert countMineNeighbors erhöhen Habt Ihr einen Hinweis für mich? Ich kom
22.01.2022
394
views
2
comments
0
Tina y
Level 6
Toronto
Question about the task
Minesweeper (Part 1/16)
Games
,
Level 0
,
Lesson 0
Under discussion
My code passed but.....
This is what I used: package com.codegym.games.minesweeper; import com.codegym.engine.cell.*; public class MinesweeperGame extends Game { } The code verified, however, upon running there was no grid, also "engine" in import and Game in class are highlighted red... What am I missing?
02.10.2020
608
views
2
comments
0
Andrei
Level 41
Question about the task
How many potential friends does a person have?
Java Collections
,
Level 6
,
Lesson 8
Under discussion
I honestly don't understand how I should interpret the 2 dimensional array.
So, it says below "Along the main diagonal, all elements are true because everybody knows himself or herself." - this I assume is the last element from each generateRelationship array element. How am I supposed to interpret the following paragraph? " The intersection of rows and columns indicates w
22.07.2021
309
views
2
comments
0
John
Level 27
Washington DC
Question about the task
Ensuring important operations aren't interrupted
Java Multithreading
,
Level 5
,
Lesson 11
Under discussion
I don't understand why the order has to be this way? Please explain.
I don't understand why the order has to be this way? Please explain.
19.02.2020
1054
views
12
comments
3
Rho366
Level 20
Guatemala City
Question about the task
Prices 2
Java Core
,
Level 8
,
Lesson 11
Under discussion
I'm out of ideas
The code works on my pc but it always fails the validaton. Any idea where could be the mistake?
12.01.2022
397
views
4
comments
0
Justin Smith
Level 41
Greenfield, USA
Question about the task
No goofing off
Java Multithreading
,
Level 5
,
Lesson 7
Resolved
Doesn't work
Don't know how else to put it. This is what I came up with. Nothing prints out at all. I have a suspicion that the problem is that the start() method has been overridden, and since it's not actually calling start() but my custom start(threadName) method, it isn't actually turning it into a thread. I
19.01.2022
258
views
2
comments
0
Isma
Level 41
Madrid
Question about the task
Producer–consumer
Java Multithreading
,
Level 7
,
Lesson 9
Under discussion
Why synchronized get and put methods?
I can't understand why do we synchronize get and put methods if ProducersTask and ConsumerTask run methods's already have a synchronized block: Why do we synchronize those: public synchronized int get() public synchronized void put(int value) If we put them in synchronized blocks as in: whil
02.03.2021
373
views
1
comment
1
LuisRC
Level 39
Gijón
Question about the task
Feel like a university dean
Java Syntax
,
Level 11
,
Lesson 6
Under discussion
Use of ::
Hi there, What are these "::" symbols being used for? I found them in universityGroup.students.forEach(System.out::println); where sturdents comes from public class UniversityGroup { public List students; thanks
19.01.2022
237
views
3
comments
0
LuisRC
Level 39
Gijón
Question about the task
StringHelper class
Java Syntax
,
Level 11
,
Lesson 4
Under discussion
Are conditions well explained?
Hi there, I don't know, perhaps is because my english is a bit rusty but to me the way this task is worded leads to confusion. These are the conditions of the taks: ************************************************************************* StringHelper class In the StringHelper class, implement two s
18.01.2022
319
views
1
comment
0
Daniel
Level 41
Rybnik
Question about the task
Socket server and client
Java Collections
,
Level 10
,
Lesson 8
Under discussion
Why the order of creation makes any differenece ?
Could someone explain it to me ?
18.08.2021
665
views
1
comment
0
Wojciech Dąbrowski
Level 27
Warsaw
Question about the task
Build a tree (part 4)
Java Collections
,
Level 1
,
Lesson 15
Resolved
Last requirement not pass
My program work fine. Where is the problem?
23.12.2020
658
views
1
comment
2
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