Page 109 | CodeGym online Java course - Help

HaeWon Chung
Level 17
Boston
Question about the task Player and Dancer
Java Core, Level 4, Lesson 4
Under discussion
Something is wrong First of all, I have already passed the task so I can't really post my whole code. So I'm just posting original code for your reference. public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(Syst
17.05.2020
704views
3comments
0
Anitamalina
Level 18
København
Question about the task Only for the rich
Java Syntax, Level 8, Lesson 8
Under discussion
Iterator and remove Hi guys, I'm a bit confused, when I iterate over a map, I understand that I can remove directly from that map, without a copy of them map.. but with by code, it doesn't seem to work - do I need a copy? or am I doing some other thing wrong ? :-)
18.12.2020
481views
4comments
0
Isma
Level 41
Madrid
Question about the task ATM
Java Core, Level 7, Lesson 10
Under discussion
Why do we need to synchronize deposit method?I understand that withdraw method will be used by more than one thread so it's compulsory to use synchronize on it. Why do we have to synchronize the deposit method while it will be used by only one thread (addMoney thread)?
18.12.2020
760views
2comments
0
Andrei
Level 41
Question about the task Consecutive threads
Java Core, Level 6, Lesson 13
Under discussion
Why do I have to use new SleepingThread.join() and why can't I use, in the next line, SleepingThread.currentThread.join() or Thread.currentThread.join() ? I hate multithreading, it makes me feel like I have learned nothing so far in Java. Why can't I use : SleepingThread.currentThread.join() // or Thread.currentThread.join() public class Solution { public volatile static int COUNT = 4; public static void main(String[] args) throws Inte
16.12.2020
406views
2comments
0
Liliane Top
Level 24
Amsterdam
Question about the task 2048 (Part 5/18)
Games, Level 0, Lesson 2
Resolved
My program is working but fails the test why? private void createNewNumber() { while (true) { int x = getRandomNumber(SIDE); int y = getRandomNumber(SIDE); if (getCellNumber(x, y) == 0) { setCellNumber(x, y, getRandomNumber(10) == 9 ? 4 : 2); break; }
18.12.2020
441views
2comments
0
Liliane Top
Level 24
Amsterdam
Question about the task Functionality is not enough!
Java Syntax, Level 10, Lesson 11
Resolved
How to make it work with a scanner?I do get the the task to work with BufferedReader and tried to make it work with scanner but tried many things but keep getting ExceptionInputMismatch. Can someone please explain where I go wrong? Scanner scanner = new Scanner(System.in); HashMap map = new HashMap<>(); do { in
18.12.2020
488views
5comments
0
Anitamalina
Level 18
København
Question about the task Kind Emma and the summer holidays
Java Syntax, Level 8, Lesson 8
Resolved
map.remove won't work In line 43, they key won't be removed from my hashMap - and I don't understand why? Can someone explain why? :)
18.12.2020
527views
1comment
0
Iqsaan Govender
Level 10
Durban
Question about the task Minesweeper (Part 4/16)
Games, Level 0, Lesson 0
Under discussion
Cannot see import and super class Hi, Please assist, my Class on inteliJ cannot see the import and the super Class. Regards.
07.08.2020
693views
1comment
0
Josephine
Level 26
Normal
Question about the task Calculating salaries
Java Core, Level 9, Lesson 11
Resolved
why my last condition not passing?Please help why my last condition not passing?Please help
17.12.2020
661views
2comments
0
gabe
Level 6
Greenville
Question about the task Creating cats
Java Syntax, Level 5, Lesson 9
Resolved
i did everything right, but it doesn't work i dunno what's wrong
30.11.2020
457views
2comments
0
Volodymyr
Level 9
L'viv
Question about the task Sum of the digits of a three-digit number
Java Syntax, Level 3, Lesson 12
Under discussion
What does it wants from me? HELP !!!I don't understand where is mistake... :(
16.12.2020
572views
3comments
0
Stanley Overby
Level 0
Under discussion
Level 0, Lesson 3 package error i get a package does not exist error when i try to do the "I think being a programmer is cool lesson". At the top of the page is package com.codegym.task.task01.task0101; Is there a way to correct this or do i just continue? Here is a link to the task: https://codegym.cc/tasks/com.codegym.task.task0
17.12.2020
607views
7comments
0
LennyMan
Level 25
Lucca
Question about the task Display numbers in reverse order
Java Syntax, Level 7, Lesson 12
Resolved
Correct output, not validated So im wondering if ask for reverse order like: input: 2, 5,7,1,9 output: 9,7,2,1 ?????? because my output its just: 9 1 7 5 2
16.12.2020
538views
4comments
0
sourav bamotra
Level 20
jammu
Question about the task Restaurant
Java Core, Level 7, Lesson 10
Resolved
well from the last level 16 with the introduction of threads the tasks now has become even more complex and long. Well i just wanted to know what is the best way adapted to read such a long multiple file programs. we Should go with main or move from one class to another .
05.10.2020
636views
2comments
0
Drazen Jankovic
Level 11
München
Question about the task R or L
Java Syntax, Level 7, Lesson 9
Resolved
Why is the second condition not met even though the "rose" string has been deleted?Why is the second condition not met even though the "rose" string has been deleted?
16.12.2020
451views
2comments
0
Dinesh
Level 7
Delhi
Resolved
Getter and Setter applied but not responding as required public class Cat{ private String name; private int age; private int weight; public Cat(String name, int age, int weight) { this.name = name; this.age = age; this.weight = weight; } public Cat() { } public void sayMeow() { System.out.println("M
15.12.2020
426views
2comments
0
Vinay
Level 11
Question about the task Cat relations
Java Syntax, Level 6, Lesson 11
Resolved
Need help!!Last 4 conditions are not meeting :-(
16.12.2020
619views
4comments
0
Anthony Mack
Level 1
Waukesha
Question about the task Number algorithms
Java Core, Level 10, Lesson 10
Under discussion
I get the right answers when I run it without verification, but it still states that I may have an infinite loop. What?If I run my solution w/o verification it returns the arrays from the Solution input w/o a problem. However, whenever I run the validation, it states that it looks like I have an infinite loop. What gives?
16.12.2020
503views
1comment
0
Andrei
Level 41
Question about the task Thread.currentThread always returns the current thread
Java Core, Level 6, Lesson 13
Resolved
Why is one of the answers main when we are starting a new thread? Name = Thread-0 Name = main Name = Thread-0 Name = main Name = main This is a version of the results I am getting when I run the program. I don't understand why it displays Name = main. After all, we are starting a new ThreadNamePrinter object named tnp which creates and starts a new thread ob
16.12.2020
542views
3comments
0
Bartosz
Level 25
Bialystok
Question about the task Transactionality
Java Core, Level 7, Lesson 10
Under discussion
Problem with task I cannot see the problem here, it should work just fine
23.04.2020
1037views
2comments
1
Maxine Hammett
Level 14
San Diego
Question about the task Rule of the triangle
Java Syntax, Level 4, Lesson 4
Under discussion
Triangle with the specified sides cannot exist,I could use your help here. I don't understand why the if statement isn't triggered when all sides are equal.
16.12.2020
472views
1comment
0
Drazen Jankovic
Level 11
München
Question about the task Somehow average
Java Syntax, Level 4, Lesson 16
Resolved
Can someone please point me to a mistake The last condition is not met
08.11.2020
781views
10comments
0
Ian De Bie
Level 28
Austin
Question about the task CRUD
Java Core, Level 7, Lesson 10
Resolved
Seriously, I give up on this one, what is wrong with my code here?the 2 tests it is missing has these recommendations from mentor, that I don't really see where my code is doing this wrong. Be sure that the person is really added to the allPeople list. Be sure that the size of the allPeople list does not change when a person's data is updated.
16.10.2020
533views
3comments
1
Jakhongir Ruziev
Level 23
Tashkent
Question about the task Shared list
Java Core, Level 7, Lesson 10
Resolved
I get this: "All of the Solution class's methods, except for the main method, must be synchronized." Even if I did so. What am I missing?
22.04.2020
1316views
3comments
2
Cristian
Level 13
Ploiesti
Question about the task Census
Java Syntax, Level 8, Lesson 8
Under discussion
Something is wrong here Hi, guys! Something is wrong here. I don't know what is wrong. Please, help me! Thank you in advance! package com.codegym.task.task08.task0815; import java.util.HashMap; import java.util.HashSet; import java.util.*; /* Census */ public class Solution { public static HashMap createMap() {
16.12.2020
473views
2comments
0
MoJo
Level 23
Cairns
Question about the task Threads and bytes
Java Core, Level 8, Lesson 11
Resolved
I'm missing the "Then each thread must find the most frequently occurring byte in its file and add it to resultMap." part.Hi there, I'm to lazy to test this on test data. Can some1 glance over this and tell give me a hint. It's almost Christmas after all =P. Sorry for the missing comments in the code, i didn't think i'd have to ask for help on this one.
13.12.2020
593views
7comments
0
Marta
Level 19
Gdansk
Question about the task Minesweeper (Part 13/16)
Games, Level 0, Lesson 0
Under discussion
I've tried everything....and don't know what is wrong. I need second pair of eyes :) Please help
03.12.2019
1247views
3comments
0
LennyMan
Level 25
Lucca
Question about the task Playing Javarella
Java Syntax, Level 7, Lesson 9
Resolved
Its working correctly but not validate I dont know what i supposed to change for being validate
15.12.2020
517views
4comments
0
Satya Vath
Level 31
Vijayawada
Question about the task Sorting bytes
Java Core, Level 8, Lesson 3
Resolved
Please Help Thanks In Advance
17.04.2019
1380views
3comments
0
JESSE AITKEN
Level 8
Tampa
Question about the task Crossing the road blindly
Java Syntax, Level 4, Lesson 4
Under discussion
Why is my code failing?I'm not sure what is wrong?
15.12.2020
544views
1comment
0

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