Page 69 | CodeGym online Java course - Help

MecoS
Level 16
Question about the task Stack trace revisited
Java Syntax, Level 9, Lesson 2
Under discussion
Help, maybe i didn't understand question Maybe is necessary a break point?
09.12.2019
1310views
2comments
0
Andrei
Level 41
Question about the task Build a tree (part 5)
Java Collections, Level 1, Lesson 15
New
What wrong with my version of the remove method?The remove method starts at line 100: @Override public boolean remove(Object o) { if (o.getClass() != String.class) throw new UnsupportedOperationException(); //After using the remove method to remove the last added node from the tree, the size method should return N-1.
17.06.2021
545views
0comments
0
Jurij Thmsn
Level 29
Flensburg
Question about the task Deep cloning of a map
Java Multithreading, Level 1, Lesson 8
Under discussion
Why use euals() and hashCode() ?I passed this exercise without implementing the equals() and hashCode() methods. I simply overrode the clone() method of the Solution class in which I cloned the "users" map of the original object to the cloned object's "users" field. In the "right solution" the equals() and hashCode() methods are
16.06.2021
563views
2comments
0
SirJava88
Level 5
Canadensis
Question about the task Crossing the road blindly
Java Syntax, Level 4, Lesson 4
Resolved
I can't understand what I'm doing wrong here. The code is outputting correctly with the right range. package com.codegym.task.task04.task0416; /* Crossing the road blindly */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); double minsInHour =
04.06.2021
816views
4comments
0
Zach
Level 22
Fort Collins
Question about the task Big Ben
Java Core, Level 6, Lesson 7
Under discussion
Can't get the first task to pass?How do I make sure that it only runs for about one second?
16.06.2021
466views
1comment
0
Caden J
Level 2
Atlanta
Question about the task Where does a Person come from?
Java Syntax, Level 2, Lesson 2
Under discussion
I dont understand what this whole "Person" thing is ggfsar
23.02.2020
1208views
4comments
0
Raj Mishra
Level 15
India
Question about the task Neo
Java Core, Level 3, Lesson 11
Under discussion
I dont understand the cause of failure My program is returning as expected and I am also following the same procedure. But still 2 cases are failing, dont know why
16.06.2021
554views
1comment
0
Maxim Raitin
Level 20
Tomsk
Question about the task The early bird gets the worm
Java Core, Level 6, Lesson 13
Resolved
I don't understand output How JVM(JDK) split words?? Or is it just random splitting (because all threads are random)?
16.06.2021
614views
1comment
0
Alvin B
Level 8
Newark
Question about the task Min and max in arrays
Java Syntax, Level 7, Lesson 12
Under discussion
What is wrong?What is wrong here? Everything seems to work according to requirements. Please help. Thanks in advance.
29.09.2020
560views
3comments
0
Jonathan
Level 12
Esslingen
Question about the task Min and max in arrays
Java Syntax, Level 7, Lesson 12
Resolved
Its running perfect ??? public class Solution { public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); int[] array = new int[20]; int maximum = 0; int minimum = 500000000; for(int i=0;i<20;i+
16.10.2020
780views
4comments
0
Jurij Thmsn
Level 29
Flensburg
Question about the task Adding a file to an archive
Java Collections, Level 1, Lesson 6
Resolved
Getting frustrated...I googled different ways how to unzip a file etc, but the information i find is so different and I really don't know how to make this work. On my computer the program seems to work, I end up getting a zip file which contains a.txt , b.txt and a new/ folder with result.mp3 . I am so frustrated, b
12.05.2021
734views
11comments
0
Sansho
Level 19
Bordeaux
Question about the task CRUD
Java Core, Level 7, Lesson 10
Under discussion
I can't understand why only the 2 firsts requ. are greens The only thing I can understand is when I "-d " a person and then ask for its infos, it "crashes" cuz of Birthday is null (and even there, I tried to make my program to ignore it but...it doesn't) . So if someone can help me, it will be soooo great!
15.06.2021
430views
2comments
0
hosniaro
Level 27
Heiloo
Question about the task Build a tree (part 1)
Java Collections, Level 1, Lesson 15
Under discussion
How is this example solved?What do you type in a search engine?
14.06.2021
635views
1comment
0
Hemel
Level 7
London
Question about the task Describing numbers
Java Syntax, Level 4, Lesson 7
Archived
I'm not sure why off numbers are not being shown.I'm using the same syntax as the previous task where we identified even & odd numbers but it's not identifying the odd numbers. Is there an issue with the order? Thanks!
15.06.2021
631views
6comments
0
Asia
Level 19
Bydgoszcz
Under discussion
what's wrong?It's just like their solution, and compiles in Intelij, but not here. Why is that? I'm getting NullPointerException
15.06.2021
569views
1comment
0
Andrei
Level 41
Question about the task Search for hidden files
Java Collections, Level 1, Lesson 4
Resolved
How does the visitFIleFailed method work?We have the visitFileFailed method and the body is below. Considering that it only add the argument to the List and then returns skip subtree, where does the check for failure take place? I don't understand. Shouldn't there be an if clause somewhere? ex. if file could not be accessed then add to fi
15.06.2021
670views
4comments
0
Karolis Garšva
Level 16
Gravesend
Question about the task Creating cats
Java Syntax, Level 5, Lesson 9
Resolved
whats wrong?it says that this constructor already exists or something like that...
14.06.2021
639views
4comments
0
Yomi Addey
Level 8
Baltimore
Question about the task Longest string
Java Syntax, Level 7, Lesson 6
Resolved
Weird error This was part of the error: " java.lang.NullPointerException at com.codegym.task.task07.task0708.Solution.main(Solution.java:20) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)" I have no clue what
14.06.2021
422views
2comments
0
Maxim Raitin
Level 20
Tomsk
Question about the task Shall we play?
Java Core, Level 6, Lesson 13
Under discussion
It works in IDE Hello, Why it doesn't accepted in CodeGym?
15.06.2021
439views
1comment
0
Zach
Level 22
Fort Collins
Question about the task Adapter
Java Core, Level 9, Lesson 3
Under discussion
Not passing sixth validation.FileOutputStream's write() method only takes bytes and int's as arguments so how are you supposed to use Strings without converting it? Thanks.
14.06.2021
381views
1comment
0
Yomi Addey
Level 8
Baltimore
Question about the task Cat relations
Java Syntax, Level 6, Lesson 11
Resolved
New issue: String cannot be converted "com/codegym/task/task06/task0621/Solution.java:23: error: incompatible types: java.lang.String cannot be converted to com.codegym.task.task06.task0621.Solution.Cat Cat cat4 = new Cat(catName4, catName2, null);" I got rid of the "missing return statement issue" (I think), but now I see wha
14.06.2021
546views
2comments
0
Mina Nabil
Level 17
Sydney
Question about the task We don't need repeats
Java Syntax, Level 8, Lesson 8
Under discussion
Hi, whats wrong with my code ?Hi, whats wrong with my code ? It doesn't pass verification ?
03.03.2021
988views
2comments
0
John
Level 17
Mansfield
Question about the task OOP: Books
Java Core, Level 5, Lesson 2
Under discussion
this I just finished the task, a little tip. Use this operator :)
11.06.2021
372views
0comments
1
David Haines
Level 13
La Crosse
Question about the task Buggy initializeIdAndName
Java Core, Level 3, Lesson 2
Under discussion
Thank you all for the comments below.Just wanted to say thank you to all who commented on this lesson. I have to admit that I was very confused about what this wanted. I ended up downloading the correct solution and comparing against my version while factoring in the comments below. Because of all this, I was able to 'reverse engine
13.06.2021
465views
0comments
1
ImDevin
Level 15
Old Town
Under discussion
logic behind this method - 1420 Those who used this way of solving the task, could you explain the logic/flow of this? I understand this is recursion, but switching the x & y and diving by the remainder, etc. I just can't follow it. Much appreciate it.
11.06.2021
910views
5comments
0
Jack Tec
Level 0
Question about the task Snake (Part 9/20)
Games, Level 0, Lesson 1
Under discussion
could anybody help please where is the bug in my code ?
13.06.2021
730views
2comments
0
Xavier
Level 17
Pearland
Question about the task Food
Java Core, Level 4, Lesson 4
Under discussion
It passed the verification, but I don't understand how.After completing the first two requirements, I just started trying different things. I started going through the description rather than the requirements and added food.onSelect(); food.onEat(); in the foodMethods method to see if the third requirement would pass, and the entire exercise passed. Wh
11.06.2021
671views
5comments
0
John
Level 17
Mansfield
Question about the task OOP: Fix inheritance problems
Java Core, Level 5, Lesson 2
Resolved
Bad operand types Whats wrong with the return statement of my finger's containBones () method?
12.06.2021
500views
1comment
0
Zach
Level 22
Fort Collins
Question about the task In the blue depths of the stack trace…
Java Syntax, Level 9, Lesson 2
Under discussion
I printed out each element of the array. What do they all represent?Why is the answer not 12 for each of the things in the array?
11.06.2021
381views
1comment
0
John
Level 17
Mansfield
Question about the task Food
Java Core, Level 4, Lesson 4
Under discussion
Confused of what's happening I just finished the task and review it, I found out that there is a Creation of Selectable interface in the main, how was that even possible? i think you can't create an object of an interface
31.05.2021
482views
20comments
0

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