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  • All questions
  • Radek
    Level 22
    Warsaw
    Question about the task Reinforce the adapter
    Java Core, Level 9, Lesson 3
    Resolved
    How to pass the vlidation?Im trying to make the solution appropriate for validator but I have no idea how to achieve it. I tested transformation of string data used in implemented methods and everything seems to be ok. Please, help.
    • 11/19/18
    • 1828views
    • 2comments
    2
  • vikr@nt
    Level 9
    Cincinatti
    Question about the task We don't need repeats
    Java Syntax, Level 8, Lesson 8
    Under discussion
    What is the problemAnybody , please let me know the issue here. I'm passing the value by copying the Map as it is done in remove function.
    • 2/26/19
    • 1461views
    • 1comment
    0
  • Araceli
    Level 19
    Buenos Aires
    Question about the task Chicken factory
    Java Core, Level 4, Lesson 6
    Resolved
    Can someone please help me see my mistake? It doesn't verify the last condition: "The HenFactory class's getHen method must return a NorthAmericanHen object if Continent.NORTHAMERICA is passed as an argument."
    • 2/22/19
    • 1942views
    • 7comments
    0
  • Muhammad Faizan Janjua
    Level 6
    Lahore
    Question about the task Deep and pure love
    Java Syntax, Level 3, Lesson 8
    Under discussion
    ? import java.io.*; public class Solution { public static void main(String[] args) throws Exception{ //write your code here BufferedReader bf = new BufferedReader(new InputStreamReader(System.in)); String name1 = bf.ReadLine(); String name2 = bf.ReadLine();
    • 9/16/18
    • 1558views
    • 4comments
    0
  • Hashirama
    Level 26
    Port-Harcourt
    Question about the task Splitting a file
    Java Core, Level 8, Lesson 5
    Resolved
    Please helpIf i run any code on my intelliJ i get this error message: Error:Module '2.JavaCore' production: java.lang.ClassCastException: org.jetbrains.jps.builders.java.dependencyView.TypeRepr$PrimitiveType cannot be cast to org.jetbrains.jps.builders.java.dependencyView.TypeRepr$ClassType How can I clear t
    • 2/17/19
    • 1844views
    • 2comments
    0
  • Balen Asangbeh
    Level 23
    Douala
    Question about the task Beer. Part 2. The recovery.
    Java Core, Level 3, Lesson 2
    Under discussion
    please what is wrong public class Solution { public static void main(String[] args) { Drink beer = new AlcoholicBeer(); System.out.println(beer.toString()); } public interface Drink { boolean isAlcoholic(); } public static class AlcoholicBeer implements Drink{ @Ove
    • 2/25/19
    • 1295views
    • 6comments
    0
  • Wojtek
    Level 23
    Solec-Zdroj
    Question about the task Longest sequence
    Java Syntax, Level 8, Lesson 6
    Under discussion
    need hintHow to reslove this task?
    • 1/15/19
    • 1936views
    • 7comments
    0
  • lordheraldor
    Level 23
    Newark
    Question about the task Splitting a file
    Java Core, Level 8, Lesson 5
    Resolved
    I'm clearly using the objects described in the requirements but they won't verifyBasically, my code works to get the necessary data in the right place but I am not initializing the correct objects to do it.
    • 2/25/19
    • 1651views
    • 7comments
    0
  • Joy Majumdar
    Level 16
    Kolkata
    Question about the task Longest sequence
    Java Syntax, Level 8, Lesson 6
    Under discussion
    Last numbers are creating problemPlease some one explain clearly
    • 2/25/19
    • 1352views
    • 1comment
    0
  • VIGNESH
    Level 2
    Mumbai
    Question about the task Implement the print method
    Java Syntax, Level 2, Lesson 1
    Under discussion
    why the task not completed?i am trying to complete this task but it is showing task failed to pass testing what the thing i missed
    • 2/25/19
    • 1296views
    • 2comments
    0
  • hidden #10424566
    Level 7
    Question about the task Static cats
    Java Syntax, Level 6, Lesson 11
    Archived
    quizwhy do we have to use the:for(Cat cat :cats )
    • 2/25/19
    • 1436views
    • 2comments
    0
  • M suleman
    Level 20
    Lahore
    Question about the task Splitting a file
    Java Core, Level 8, Lesson 5
    Under discussion
    condition 2 & 3 is not satisfy byte[] buffer = new byte[1000]; while (inputStream.available() > 0) //as long as there are unread bytes { //Read the next block of bytes into buffer, and store the actual number of bytes read in count. int count = inputStream.read(buffer); outputStream.write(buffer, 0, count/2);
    • 11/12/18
    • 2236views
    • 3comments
    0
  • Nazim Haider
    Level 2
    Mumbai
    Question about the task Family relations
    Java Syntax, Level 2, Lesson 2
    Under discussion
    whats the wrong with my code? public class Solution { public static void main(String[] args) { Man man = new Man(); Woman woman = new Woman(); man.wife = Woman; Woman.husband = Man; } public static class Man { public int age; public int height; public Wom
    • 10/27/18
    • 1640views
    • 5comments
    0
  • mallikarjuna
    Level 3
    Bangalore
    Question about the task Our first converter!
    Java Syntax, Level 2, Lesson 2
    Under discussion
    plz help me public class Solution { public static void main(String[] args) { System.out.println(convertCelsiusToFahrenheit(41)); } public static double convertCelsiusToFahrenheit(int celsius) { double TF=(double))(celsius)*9/5)+32; return TF; } }
    • 8/21/18
    • 1836views
    • 7comments
    0
  • srikanth
    Level 10
    Bangalore
    Question about the task Shortest or longest
    Java Syntax, Level 7, Lesson 6
    Under discussion
    please where is the error in my code last two conditions are not satisfied manually when i compile it ,code seems to fine ,where is the mistake
    • 1/23/19
    • 1719views
    • 3comments
    1
  • Roshan Singh
    Level 12
    Question about the task Arithmetic mean
    Java Syntax, Level 5, Lesson 5
    Under discussion
    Not able to Compile the code -----Giving the following compilation error..com/codegym/task/task05/task0507/Solution.java:11: error: cannot find symbol BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); ^ symbol: class BufferedReader location: class com.codegym.task.task05.task0507.Solution com/codegym/task/task05/task0507/Solu
    • 2/24/19
    • 3244views
    • 5comments
    0
  • SWAPNIL SHUKLA
    Level 7
    Baddi
    Question about the task Calling a constructor from a constructor
    Java Syntax, Level 5, Lesson 9
    Under discussion
    ErrrorWhats wrong in the code . What condition is not Satisfied?
    • 2/24/19
    • 1527views
    • 1comment
    0
  • lordheraldor
    Level 23
    Newark
    Question about the task CRUD 2
    Java Core, Level 7, Lesson 10
    Resolved
    Everything but my create method worksI try to run it with arguments and it basically gives me an array out of bounds exception on the switch statement. I don't know what else to do.
    • 2/23/19
    • 1594views
    • 2comments
    0
  • Gurpreet Grewal
    Level 4
    Mumbai
    Question about the task Plan to conquer the world
    Java Syntax, Level 3, Lesson 8
    Under discussion
    plz explain this exercise please explain this program line by line.
    • 2/23/19
    • 1555views
    • 1comment
    0
  • Ash Ka
    Level 13
    Calgary
    Question about the task Drawing a rectangle
    Java Syntax, Level 4, Lesson 13
    Resolved
    What's wrong with the code ?I thought having println() at the end is adding an extra empty line and that is the problem but even after adding a condition (If condition) such that there are exactly 2 rows and no extra empty rows, still I see the same error
    • 2/22/19
    • 1916views
    • 2comments
    0
  • bri
    Level 7
    Sevilla
    Question about the task Financial expectations
    Java Syntax, Level 3, Lesson 12
    Resolved
    What am I missing?When I press Run, instead of 100 it shows me -1. Not sure what I need to add.
    • 1/27/19
    • 2308views
    • 3comments
    0
  • Wojtek
    Level 23
    Solec-Zdroj
    Question about the task Reinforce the singleton pattern
    Java Core, Level 5, Lesson 12
    Under discussion
    How to initialize instance in the getInstance method that method always return the same object?need help
    • 2/21/19
    • 2632views
    • 5comments
    0
  • Wojtek
    Level 23
    Solec-Zdroj
    Question about the task File in a static block
    Java Core, Level 5, Lesson 12
    Under discussion
    How to read file properly in this task?My input is: "Static methods and variables are not linked to objects of the class; they are linked to the class itself. If we create ten Variables objects (see the example at the beginning of this level), we will have ten instanceVariable variables (one for each object) and only one shared (static
    • 2/22/19
    • 2086views
    • 3comments
    0
  • Martin Evtimov
    Level 22
    Chicago
    Question about the task Spaces
    Java Core, Level 8, Lesson 11
    Resolved
    HelpAny suggestions?
    • 2/22/19
    • 1702views
    • 4comments
    0
  • Hashirama
    Level 26
    Port-Harcourt
    Question about the task Finding data inside a file
    Java Core, Level 8, Lesson 11
    Under discussion
    Help pleaseThey have started again!!!!
    • 2/21/19
    • 1667views
    • 3comments
    0
  • Erick
    Level 8
    Rockville
    Question about the task Minimum of N numbers
    Java Syntax, Level 8, Lesson 11
    Resolved
    What exactly am I missing?So, umm... what's going on here? The main method DOES call getIntegerList method, as well as the getMinimum method (which seems to find the minimum), and it DOES display text on the screen, and it compiles properly. What gives?
    • 2/22/19
    • 1983views
    • 5comments
    0
  • Jeff Jeffy
    Level 15
    Irvine
    Question about the task Currency exchange
    Java Syntax, Level 3, Lesson 3
    Resolved
    Can't use returned valueI cant seem to use the value I returned, can someone explain what I'm doing wrong?
    • 1/13/19
    • 1850views
    • 3comments
    0
  • Dedcom
    Level 19
    Lahore
    Question about the task Different methods for different types
    Java Core, Level 5, Lesson 12
    Resolved
    whats wrong here?Integer condition is not working whenever i enter value greater than 128 or less than 0 , but whenever i enter big value like 1299999 then Integer condition works and it prints that this value is an Integer
    • 2/21/19
    • 2181views
    • 4comments
    0
  • Andrey
    Level 2
    Tula
    Under discussion
    problems with the first lessonGreetings to all! Tell me, what's wrong with my code? public class Solution { public static void main(String[] args) { System.out.print("I think being a programmer is cool"); } }
    • 2/20/19
    • 1531views
    • 5comments
    0
  • Eric Soto
    Level 3
    Tampa
    Question about the task Implement the print method
    Java Syntax, Level 2, Lesson 1
    Under discussion
    I managed to solve it but I am not sure if I understood.I got it right according to the verification but I feel like I didnt learn what it exactly meant. Was is THAT simple the solution?
    • 2/21/19
    • 1587views
    • 1comment
    0
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CodeGym CodeGym is an online course for learning Java programming from scratch. This course is a perfect way to master Java for beginners. It contains 1200+ tasks with instant verification and an essential scope of Java fundamentals theory. To help you succeed in education, we’ve implemented a set of motivational features: quizzes, coding projects, content about efficient learning, and a Java developer’s career.
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