Page 71 | CodeGym online Java course - Help

Naughtless
Level 41
Olympus Mons
Resolved
Use Interface or Class when instancing? Why?As my very small and insignificant library of knowledge on Java grows, I've come across a question: Why is it that sometimes people instance by interface like : List<Object> someList = new ArrayList<>(); /* OR */ Animal minnie = new Cat(); instead of just instancing by the class itse
02.06.2021
631views
13comments
2
Zach
Level 22
Fort Collins
Question about the task Moon Lander (Part 4/23)
Games, Level 0, Lesson 4
Under discussion
The last task is not passing? package com.codegym.games.moonlander; public class Rocket extends GameObject { public Rocket (double x, double y, int[][] matrix) { super(x, y, ShapeMatrix.ROCKET); } }
22.05.2021
564views
1comment
0
Vidya Pb
Level 5
Ernakulam
Question about the task Snake (Part 5/20)
Games, Level 0, Lesson 1
Under discussion
Why is this error coming? What am I doing wrong with the ArrayList?cannot find symbol symbol: class List location: class com.codegym.games.snake.part05.Snake. file com/codegym/games/snake/part05/Snake.java, line 6, position 100 GameObject.java Apple.java Snake.java SnakeGame.java
01.11.2019
1716views
2comments
1
Raimundo Hernandez
Level 2
Under discussion
why the level 2 tasks do not appear?I get the level 2, but the tasks do not appear, what could be the error?
04.06.2021
414views
1comment
0
Daniel
Level 41
Rybnik
Question about the task Adding a file to an archive
Java Collections, Level 1, Lesson 6
Under discussion
All requirements are failed but locally works!Hi, I know my solution may be not the most efficient but it works! Is there any bug that makes all requirements fail ? Something like System.exit() ? Any help would be appreciated!
03.06.2021
522views
2comments
0
Zach
Level 22
Fort Collins
Question about the task Let's make the code do something useful!
Java Syntax, Level 9, Lesson 11
Under discussion
Cannot get the third task to pass.I do not get this question at all....
03.06.2021
370views
1comment
0
Artur
Level 22
Moorends
Question about the task Positive and negative numbers
Java Syntax, Level 4, Lesson 7
Resolved
keep having 0 ain't positive nor negative error Did i miss something in my code? i have made it clear that if it is 0 to not count not to positive nor negative but still get the error :/
08.06.2020
782views
5comments
0
Zach
Level 22
Fort Collins
Question about the task Let's make the code do something useful!
Java Syntax, Level 9, Lesson 11
Under discussion
Not sure where I am going wrong on second task?I don't know what is wrong with code.
02.06.2021
492views
1comment
0
Murshid Saleem
Level 0
Question about the task Amigo is very smart
Java Syntax, Level 0, Lesson 2
Under discussion
need some help I am still trying to figure out what and how exactly to complete this task. newbie here
02.06.2021
596views
1comment
0
John
Level 17
Mansfield
Question about the task Chicken factory
Java Core, Level 4, Lesson 6
Under discussion
cannot find symbol method getDescription ()why can't i call super.getDescription?
02.06.2021
461views
4comments
0
Daniel
Level 41
Rybnik
Question about the task What's in the folder?
Java Collections, Level 1, Lesson 4
Under discussion
Need help I think I need some help! Locally this code works great and exactly how it scholuld according to task conditions. Any advices ? hints ?
02.06.2021
529views
3comments
0
Patrick Batterfly
Level 17
Livny
Question about the task Kind Emma and the summer holidays
Java Syntax, Level 8, Lesson 8
Resolved
Please, I need help I don't know why this doesn't work. I even tried to change comparison sign to another sides, but it still didn't help to move on. Please, tell me what i did wrong
02.06.2021
556views
7comments
0
Gellert Varga
Level 23
Szekesfehervar
Question about the task Chicken factory
Java Core, Level 4, Lesson 6
Resolved
I don't understand why not met 5. and 6. requirements After many attempts, I don’t understand why it always reject requirements 5 and 6. Maybe I didn’t well understand something from the requirements, I don’t know. The program seems to be working.
19.02.2021
684views
7comments
0
Daisy
Level 8
San Jose
Question about the task Playing Javarella
Java Syntax, Level 7, Lesson 9
Under discussion
Help Please!error: invalid method declaration; return type required printList(number1);
02.06.2021
651views
1comment
0
Hisham Thabet
Level 8
Lahj
Resolved
The program won't compile! .also, I can't understand what the Codegym say "If we add a cat to a number, there is no automatic string conversion" can you explain for me? Thank you Cat cat = new Cat(); int a = 5; String text = cat + a + "The cat is " + cat + a;
01.06.2021
602views
2comments
0
Anonymous #10749591
Level 3
Question about the task Our first converter!
Java Syntax, Level 2, Lesson 2
Under discussion
How is it wrong. I wrote just as hinted. (9/5) first - the answer was wrong. then remove the bracket as in 9/5. again the last condition was unapproved because the answer was wrong. Then I wrote 9/5.0 as per the solution and only then was the answer right.
01.06.2021
584views
1comment
0
Manav Dhote
Level 0
bhopal
Under discussion
language how can I change language
25.04.2020
806views
2comments
1
Zach
Level 22
Fort Collins
Question about the task Most frequent bytes
Java Core, Level 8, Lesson 3
Under discussion
The error I'm getting is: Don't display the same byte several times. ???How is it giving me this error? I even changed my output to a set so there shouldn't be any duplicates. Although the map should have solved this already. Thanks
01.06.2021
574views
1comment
0
Akash sah
Level 8
Kathmandu
Question about the task Implement the print method
Java Syntax, Level 2, Lesson 1
Under discussion
what is wrong in this code?i tried new line but not works
08.02.2019
2024views
7comments
0
Maxim Raitin
Level 20
Tomsk
Question about the task Consecutive threads
Java Core, Level 6, Lesson 13
Under discussion
volatile - what is this?Why we need volatile in variables?
01.06.2021
551views
1comment
0
Dwight Burrow
Level 3
Minnetonka
Question about the task Square of a number
Java Syntax, Level 1, Lesson 8
Under discussion
Did I miss something?I'm not sure I learned anything about sqr(). I don't know anything about it or how it works or where I put it.
05.05.2021
643views
3comments
0
Patrick Batterfly
Level 17
Livny
Question about the task Longest string
Java Syntax, Level 7, Lesson 6
Resolved
Guys,please, tell me what's wrong with my code All conditions are met, but somehow the last requirement doesn't count. What's the issue?
31.05.2021
453views
4comments
0
Sansho
Level 19
Bordeaux
Question about the task Request parser
Java Core, Level 5, Lesson 12
Under discussion
[3rd req. X ] My outputs are corrects, but the Robot is tellin' me nooOOooOOOo Well, I don't understand in which case I'm wrong, even when I test with a custom link...
27.05.2021
620views
9comments
0
Manoj Deo
Level 3
Mumbai
Question about the task I'm 15 again!
Java Syntax, Level 1, Lesson 4
Under discussion
??whATS WRONG
20.10.2018
1217views
4comments
0
iqbalhussain
Level 22
Peshawar
Question about the task How do you serialize Singleton?
Java Core, Level 10, Lesson 4
Resolved
need help last condition is not satisfied need help last condition is not satisfied
27.01.2019
1629views
4comments
0
John
Level 17
Mansfield
Question about the task Sorting even numbers from a file
Java Core, Level 3, Lesson 11
Under discussion
Program displays too many lines Anybody knows whats wrong?
28.05.2021
484views
2comments
0
Pahunchik
Level 8
Moscow
Question about the task Checking the order
Java Syntax, Level 7, Lesson 9
Under discussion
help please can't pass last condition
30.05.2021
1002views
2comments
0
Pahunchik
Level 8
Moscow
Question about the task Duplicating words
Java Syntax, Level 7, Lesson 9
Under discussion
I get an error when checking the last condition:I get an error when checking the last condition: Display the resulting list, each element on a new line.
30.05.2021
404views
5comments
0
Liliane Top
Level 17
Amsterdam
Question about the task Buggy initializeIdAndName
Java Core, Level 3, Lesson 2
Resolved
It compiles and runs so why do I fail the test Not sure what is requested.
07.03.2020
1272views
6comments
1
AP
Level 15
Bodmin
Under discussion
Can I run Minesweeper game in Intellij Idea?Is anyone able to run Minesweeper game in IntelliJ Idea? If yes, please help with the debug configurations. I am looking for Main class to define in configuration. Thanks
06.09.2020
740views
1comment
0

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