JavaRush
Course
Tasks
Games
Help
Subscriptions
Success stories
Chat
Forum
Articles
Users
Activity

Help with tasks

  • Reviews
  • About us
Start
Start learning
  • All questions
All quests
All levels Level 0 Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Level 7 Level 8 Level 9 Level 10
Any status New Discussed Resolved Archived Duplicates
Hot Popular New Old
  • Maxim Raitin
    Level 8
    Tomsk
    Question about the task Greater than 10? You're not a good fit for us
    , Level 8, Lesson 8
    New

    It works in IDE

    last requir doesn't met. Why? It works correct in IDE
    • 27 February 2021
    • 1view
    • 0comments
    0
  • remote87
    Level 15
    Sofia
    Question about the task Request parser
    , Level 5, Lesson 12
    New

    I'm loosing my mind here...

    Hello everyone! For the last couple of days, I have been trying to solve this task... I know I'm really close, but I can't figure this out: Why is this code not capturing name as a next token?! Any hint?
    • 27 February 2021
    • 12views
    • 0comments
    0
  • TaoLu
    Level 5
    泾县
    Under discussion

    build failed

    CodeGymTasks\8.Games\src\com\codegym\games\minesweeper\MinesweeperGame.java:8:8 java: 无法访问javafx.application.Application 找不到javafx.application.Application的类文件 manual op: javac -cp lib/* -encoding "UTF-8" -d ../out/production/8. Games src/com/codegym/games/minesweeper/*.java src\com\codegym\games\
    • 21 February 2021
    • 28views
    • 2comments
    1
  • chan kenneth
    Level 7
    Hong Kong
    Question about the task Shortest or longest
    , Level 7, Lesson 6
    Under discussion

    cannot verify

    I think i have got the answer but i cannot verify it. can somebody helps ? Thank you
    • 27 February 2021
    • 9views
    • 1comment
    0
  • Andrei
    Level 20
    Question about the task Deserialization
    , Level 10, Lesson 10
    Under discussion

    Please break down this code

    Three of the requirements are: The getOriginalObject method must return the A object received from the ObjectInputStream. The getOriginalObject method must return null if an A object is not received during deserialization attempts. The getOriginalObject method must return null if an exception is th
    • 26 February 2021
    • 28views
    • 6comments
    0
  • Aleksandar Neshkovski
    Level 7
    Skopje
    Question about the task Expressing ourselves more concisely
    , Level 7, Lesson 6
    Under discussion

    The program run too long and was closed!

    With this task, I constantly get this message (The program run too long and was closed). My solution is 90 the same as one of the previous tasks (Longest string), since the conditions are almost the same, only flipped around. I have experienced this kind of thing before, a few days ago, but back the
    • 26 February 2021
    • 14views
    • 2comments
    0
  • Andrei
    Level 20
    Question about the task Overriding serialization
    , Level 10, Lesson 7
    Resolved

    What is the point of creating a new thread in the readObject method and starting that thread if that is done already when we create a new object?

    package com.codegym.task.task20.task2015; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.Serializable; /* Overriding serialization */ public class Solution implements Serializable, Runnable { private transient Thread runner;
    • 26 February 2021
    • 21views
    • 3comments
    0
  • Сергей
    Level 3
    Question about the task Escaping characters
    , Level 3, Lesson 6
    Under discussion

    what's wrong?

    package com.codegym.task.task03.task0316;
    • 26 February 2021
    • 11views
    • 1comment
    0
  • szhxk
    Level 0
    Under discussion

    if i want to start programming where do i start?

    if i want to start programming where do i start?
    • 25 February 2021
    • 14views
    • 2comments
    0
  • Gellert Varga
    Level 14
    Szekesfehervar
    Resolved

    obj.hashCode() vs System.identityHashCode(obj))

    What is the difference? I thoght the reference of the object will returned by both of them , but it seems not. public class Solution { public static void main(String[] args) { String s = "abcd"; String s1 = new String("abcd"); String s2 = new String("abcd"); S
    • 24 February 2021
    • 32views
    • 4comments
    0
  • Drzazgen
    Level 7
    Warsaw
    Question about the task Min and max in arrays
    , Level 7, Lesson 12
    Under discussion

    Why I can't find max and min?

    On output i got min and max but sill is one requirements not meet.
    • 26 February 2021
    • 13views
    • 3comments
    0
  • Patrick
    Level 13
    Arlington
    Under discussion

    Can I stop the popups that appear after completing achievements? It's kind of annoying

    After completing achievements I get a bunch of popups with your new points, an option to share on social media, etc. Can I prevent that?
    • 23 October 2019
    • 443views
    • 9comments
    1
  • Shilpa nori
    Level 23
    Rochester
    Question about the task Inverted words
    , Level 2, Lesson 9
    Under discussion

    Doesn't validate

    I don't know what's wrong with my solution, it works for different inputs. Your help is much appreciated. thanks
    • 26 February 2021
    • 17views
    • 1comment
    0
  • Zach
    Level 14
    Fort Collins
    Question about the task HashMap of Objects
    , Level 8, Lesson 3
    Under discussion

    Don't see the problem but last task will not pass

    package com.codegym.task.task08.task0806; import java.util.HashMap; import java.util.Map; /* HashMap of Objects */ public class Solution { public static void main(String[] args) throws Exception { HashMap map = new HashMap(); map.put("Sim", new Integer(5)); map.put(
    • 25 February 2021
    • 16views
    • 3comments
    0
  • Zach
    Level 14
    Fort Collins
    Question about the task Cat code won't compile
    , Level 7, Lesson 12
    Under discussion

    Number format exception error

    I changed all the int variables to Strings and got it to work but that doesn't pass some of the tests. Also tried to add another readLine or change the name to no avail. Not understanding what I am supposed to do. Thanks. package com.codegym.task.task07.task0726; import java.io.BufferedReader;
    • 25 February 2021
    • 15views
    • 1comment
    0
  • Mina Nabil
    Level 14
    Sydney
    Question about the task Functionality is not enough!
    , Level 10, Lesson 11
    Resolved

    Hi, whats wrong with my code ? thanks.

    Hi, whats wrong with my code ? thanks.
    • 25 February 2021
    • 31views
    • 3comments
    0
  • MoJo
    Level 22
    Cairns
    Question about the task Number algorithms
    , Level 10, Lesson 10
    Resolved

    I'm not sure if i understood the task correctly

    So i thought it works for me but it doesn't let me pass. Looking at various internet sides etc. it seems that some people do not think 3-9 are so called Armstrong numbers: https://pages.mtu.edu/~shene/COURSES/cs201/NOTES/chap04/arms.html My output: 4 [1, 2, 3, 4, 5, 6, 7, 8, 9, 153, 370, 371, 407]
    • 24 February 2021
    • 30views
    • 5comments
    0
  • Anthony Chalk
    Level 26
    London
    Question about the task Let's recall inheritance
    , Level 4, Lesson 9
    Resolved

    PLease help

    I tried pretty much copy-pasting the A class code into the C Class (changing it to B). No idea how to do this.
    • 25 February 2021
    • 14views
    • 2comments
    0
  • Michał
    Level 6
    Under discussion

    Error while signing in using a secret key. Check CodeGymPlugin.properties.

    I entered the wrong key when trying to connect InteliiJ and CodeGym. Now I can't correct it. I have uninstalled / installed the plugin again. What can I do? what is a secret key in general? Password? Thank you for your help.
    • 14 September 2020
    • 139views
    • 5comments
    0
  • Leon Sandvoß
    Level 17
    Frankfurt am Main
    Under discussion

    Change the Task language

    Hello, I'm aware that it is possible to change the interface language, but that doesn't change the language in the tasks. Is it possible to change the language in the tasks?
    • 7 April 2020
    • 136views
    • 1comment
    1
  • Josephine
    Level 20
    Normal
    Question about the task Moon Lander (Part 20/23)
    , Level 0, Lesson 4
    Under discussion

    How to refer to the rocket's x feild?.Someone please help..

    How to refer to the rocket's x feild? you need to set the downFire object's x field to the rocket's x field + (width / 2),
    • 24 February 2021
    • 14views
    • 2comments
    0
  • Daniel Whyte
    Level 9
    Question about the task Changing functionality
    , Level 7, Lesson 12
    Under discussion

    Result

    Why can't it find String result? I don't think it's out of any scope.
    • 24 February 2021
    • 15views
    • 2comments
    0
  • Tamas Horcsak
    Level 15
    Leeds
    Question about the task Sorting even numbers from a file
    , Level 3, Lesson 11
    Under discussion

    could you guys check why my code doesn`t work please

    public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); InputStream is = null; byte[] buffer = new byte[100]; int c; ArrayList array = new ArrayList(); try {
    • 24 February 2021
    • 37views
    • 3comments
    0
  • Andrei
    Level 20
    Question about the task Reading and writing to a file: CodeGym
    , Level 10, Lesson 2
    Resolved

    Second requirement is not validating. Should I compare the object that is being loaded to the ones already existing in the list?

    Should I compare the object that is being loaded to the ones already existing in the list? If they are the same should I replace the object in the list?
    • 24 February 2021
    • 25views
    • 4comments
    0
  • Mina Nabil
    Level 14
    Sydney
    Question about the task Method in a try-catch
    , Level 9, Lesson 11
    Resolved

    Whats wrong with my code

    Hi, whats wrong with my code ? It works fine but when I try to verify it, it says it takes too long ?
    • 24 February 2021
    • 32views
    • 6comments
    0
  • Zach
    Level 14
    Fort Collins
    Question about the task We don't need repeats
    , Level 8, Lesson 8
    Under discussion

    Why an concurrent error even though I'm using an Iterator

    I don't know why I am getting this error with an iterator. If I didn't have to use the other method I could probably solve this. Thanks for your help. package com.codegym.task.task08.task0817; import java.util.HashMap; import java.util.Map; import java.util.Iterator; /* We don't need repeats
    • 24 February 2021
    • 8views
    • 1comment
    0
  • Anthony Chalk
    Level 26
    London
    Question about the task Refactoring, anonymous classes
    , Level 4, Lesson 9
    Under discussion

    Completely lost

    I have 12 errors in my code and I just have no idea how to do this one
    • 24 February 2021
    • 25views
    • 4comments
    0
  • Anatoly
    Level 15
    Question about the task Reading a file
    , Level 3, Lesson 11
    Under discussion

    Who can explain?

    I did the solution with the help of the new feature "download correct solution". Who can explain how it works and what it doing? I tried to run that code in Idea, but there is nothing coming out to console,despite it passing validator - i am stil not fully understand what it doing. Even debuging did
    • 22 February 2021
    • 30views
    • 3comments
    0
  • Vincenzo Seggio
    Level 24
    Question about the task Phone number verification
    , Level 2, Lesson 13
    Resolved

    How does it work?

    Hi people, i try to check the 3. Verification criteria of the task: 3) the number may contain 0-2 non-consecutive '-' characters with public class Test { public static void main(String[] args) { String s = "+3805012f3-45-67"; //s = "A"; String regex = "[-]{0,2}";
    • 24 February 2021
    • 18views
    • 2comments
    0
  • Tangerin
    Level 27
    Chongqing
    Question about the task Clocks
    , Level 6, Lesson 7
    Under discussion

    Infinite loop? Can't figure it out

    CodeGym gives me this warning but in IDEA everything worked just fine. The program quits itself as soon as "Double Check" shows up. Also please remove the "Thread.stop()", that's not part of my code. Thanks!
    • 16 July 2019
    • 436views
    • 4comments
    0
  • 1
  • 2
  • 3
  • ...
  • 311
Learn
  • Registration
  • Java Course
  • Help with Tasks
  • Pricing
  • Game Projects
Community
  • Users
  • Articles
  • Forum
  • Chat
  • Success Stories
  • Activity
About
  • About us
  • Contacts
  • Reviews
  • Press Room
  • CodeGym for EDU
  • FAQ
  • Support
Follow us
Interface language
© 2021 CodeGym Programmers Are Made, Not Born
© 2021 CodeGym Programmers Are Made, Not Born