Page 54 | CodeGym online Java course - Help

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
5/11/20
803views
5comments
1
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
1/26/22
703views
2comments
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
1/26/22
836views
1comment
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
8/13/21
671views
2comments
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
1/24/22
1074views
3comments
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...
10/7/18
2488views
2comments
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?
1/23/22
562views
3comments
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.
1/24/22
965views
7comments
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?
1/23/22
618views
2comments
0
school
Level 1
Ramsgate
Question about the task Minesweeper (Part 3/16)
Games, Level 0, Lesson 0
Under discussion
memes mems
2/4/21
561views
0comments
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?
1/24/22
573views
0comments
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
1/21/22
519views
4comments
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();
1/23/22
454views
1comment
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.
1/23/22
586views
1comment
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?
1/21/22
612views
6comments
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
1/22/22
628views
2comments
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?
10/2/20
840views
2comments
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
7/22/21
559views
2comments
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.
2/19/20
1429views
12comments
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?
1/12/22
636views
4comments
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
1/19/22
481views
2comments
0
Isma
Level 1
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
3/2/21
562views
1comment
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
1/19/22
480views
3comments
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
1/18/22
542views
1comment
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 ?
8/18/21
1024views
1comment
0
Wojciech Dąbrowski
Level 1
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?
12/23/20
1010views
1comment
2
Justin Smith
Level 41
Greenfield, USA
Question about the task MVC (part 8)
Java Multithreading, Level 4, Lesson 14
Resolved
The private modifier on the getAllUsers method is causing a problem We have to create a private getAllUsers method in the MainModel class (Step 6). But then we have to also declare this method in the Model interface (Step 8). How can that be? The interface methods cannot be private, and a method implemented from an interface cannot have a different access modifier.
1/16/22
632views
3comments
0
dean
Level 8
Deutschland
Question about the task The Three "Muscateers"
Java Syntax, Level 5, Lesson 5
Under discussion
Why there are 2 classes in this code?Hey a questions about this challenge: Why there are 2 classes in this challenge? class Solution & class Cat .. I thought there can/should be only 1 class per file or? package com.codegym.task.task05.task0504; /* The Three "Muscateers" */ public class Solution { public static void mai
4/23/19
1978views
11comments
1
Elektra
Level 2
United States of America
Question about the task Working with dates
Java Syntax, Level 8, Lesson 11
Resolved
What's wrong?The code is working. It runs and generates the required answer. According to the example they provided they want the first day of the year to be counted, right? I tried a million different dates and my answer is correct every time. The answer is correct, the logic is correct and the math is correct.
1/15/22
878views
2comments
0
Luyi
Level 31
Kosice
Question about the task Knowledge is power!
Java Multithreading, Level 4, Lesson 9
Resolved
No able to pass condition regarding sort Hi, I am not able to pass 3. condition any tips?
11/5/19
1416views
4comments
0

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