Page 8 | CodeGym online Java course - Help

Morteza Jalalvand
Level 31
Question about the task Pharmacy
Java Core, Level 7, Lesson 10
New
possible bug in the correct solution The allDrugs map is static but the methods of DrugController are not. Making its methods synchronised still allows simultaneous access to the allDrugs via 2 different DrugController objects. Either the methods should be static too or or synchronized(DrugController.class) should be used.
18.05.2024
104views
0comments
0
Inna
Level 16
United Kingdom
Question about the task Binary converter
Java Syntax, Level 9, Lesson 2
Resolved
toBinary(int) method works as it is required but doesn't pass validation Hi everyone, Can anybody explain what the validator expect from toBinary(int) method ? It converts the integer and returns its string representation It returns an empty string if the input parameter is less than or equal to 0. What is wrong?
17.05.2024
133views
2comments
0
Bob
Level 10
United States of America
Question about the task Need for speed
Java Syntax, Level 10, Lesson 2
Under discussion
What am I doing wrong? I have tried a couple of different things, but I am at a loss. Perhaps I am misinterpreting the requirements? A hint would be appreciated.
15.05.2024
130views
2comments
0
Scott
Level 14
Ashburn
Question about the task Four mistakes
Java Core, Level 3, Lesson 2
Under discussion
Why it has to be static class Hobby?Why it has to be static class so we can use following line. System.out.println(new Hobby().toString());
25.04.2020
1230views
2comments
0
Joe
Level 5
Salt Lake City
Question about the task Minesweeper (Part 1/16)
Games, Level 0, Lesson 0
Under discussion
Would love some help as to why this isn't passing the third criteria. package com.codegym.games.minesweeper; import com.codegym.engine.cell.*; public class MinesweeperGame extends Game { }
20.06.2020
1638views
8comments
15
Evgeniia Shabaeva
Level 40
Budapest
Question about the task Verifying existence
Java Syntax, Level 14, Lesson 1
Resolved
Same as the suggested solution but doesn't work Well, this quite simple code of mine doesn't only produce the expected output but also fully coincides with the suggested solution (I checked it line by line). Still, it does not pass the verification. Could there be a bug?
13.05.2024
158views
4comments
0
Anonymous #11512242
Level 5
Question about the task Sprucing up your resume
Java Syntax, Level 2, Lesson 4
Under discussion
Im trying to get all four lines to print lowercase?I add the .toLowerCase option to the three lines, but how can I make the system out print on top (the first instance).
13.05.2024
137views
1comment
0
haayden
Level 18
United States of America
Question about the task The end of times
Java Syntax, Level 17, Lesson 6
Resolved
Time Conversion I understand what the task is trying to make me do, but I don't understand how to do it. I've tried using millisecond to second conversions, but I can't seem to convert it, because I'm not getting the exact amount the milliseconds are giving me.
16.05.2022
716views
7comments
0
Lord_Gabo
Level 11
Arzachena
Question about the task This age doesn't work for me…
Java Syntax, Level 3, Lesson 4
Under discussion
The Person class's adjustAge method should increase the Person's age by 20. Why is my code not good?After three days I need to ask for help! Where am I going wrong? The error being validated tells me The Person class's adjustAge method should increase the Person's age by 20. The printed output is 40 , I think I did not understand well .. I tried with: Person person = new Person(); this.age = age
18.03.2022
1128views
4comments
2
HaeWon Chung
Level 17
Boston
Question about the task Neo
Java Core, Level 3, Lesson 11
Resolved
I don't know why this code runs After reading answers from other questions, I understand that I have to change DBObject to User to pass the verification. However, even without changing it, the code displays correct answer. Could someone please explain why it displays correct answer?
16.05.2020
682views
4comments
0
X SS
Level 25
Question about the task Reverse
Java Syntax, Level 6, Lesson 3
Under discussion
Says can't find symbol Please look at my solution it prompts can't find symbol on 23rd line? Why?
25.04.2024
154views
1comment
0
rags 3
Level 5
Wichita
Question about the task Price of apples
Java Syntax, Level 3, Lesson 4
Under discussion
how is the Apple.addprice working tried to switch with subtract doesn't work I understand that your creating a Apple class apple and passing variable applePrice to it but i want to know how the addprice works how does the operator work tried to exchange subtract but didnt work like Apple.subtractPrice(100);
24.04.2024
145views
1comment
0
FelixUjo
Level 35
Gijón
Question about the task Archiver (part 8)
Java Multithreading, Level 7, Lesson 15
Under discussion
I do not understand why it does not validate the task. Help If any exception other than a NoSuchZipFileException occurs, then display "An error occurred. Please check the entered data."
22.04.2024
161views
1comment
0
Evgeniia Shabaeva
Level 40
Budapest
Question about the task StringTokenizer
Java Syntax, Level 10, Lesson 6
Under discussion
Which task conditions am I missing?I've written code that has to use a StringTokenizer and split the input string into parts based on the delimiter variable, while the maximum possible number of tokens must be 6. The result must be returned without null tokens. I guess I've done all that and my code produces the required output. What
22.04.2024
151views
2comments
0
Dương Tiến Đạt
Level 41
Ha Noi City
Question about the task Chat (part 8)
Java Multithreading, Level 6, Lesson 15
Under discussion
What's wrong?I couldn't seem to pass the "The name request should repeated until the message type of the response is equal to MessageType.USER_NAME." validation. Can someone tell me why?
27.08.2020
638views
2comments
0
rags 3
Level 5
Wichita
New
can i reset where im at Hi started while back then quit do to money is there a way to reset to start lesson one again so i can refresh have bought year program now so im good for while
21.04.2024
120views
0comments
0
Christy
Level 5
Question about the task Summation
Java Syntax, Level 4, Lesson 0
Under discussion
Summation exercise with Boolean values Hi, can someone pls explain why the Boolean isExit variable is initially initialized to false and why the boolean in the while loop condition is set as true (!isExit) only for the Boolean in the if condition to be set to true. It's quite confusing to me. I found it hard to come up with the correct s
20.04.2024
138views
2comments
0
Evgeniia Shabaeva
Level 40
Budapest
Question about the task Remove duplicate strings
Java Syntax, Level 6, Lesson 4
Resolved
What's wrong if the output's right?The code I've written reads 6 strings from the console, finds duplicated ones among them, substitutes them with null and produces the expected output. Why does it still fail validation (in particular, does not meet the 2nd requirement)?
22.03.2024
266views
9comments
0
Evgeniia Shabaeva
Level 40
Budapest
Question about the task Filling an array
Java Syntax, Level 6, Lesson 8
Resolved
What's wrong if the output's right?I'm wondering which particular requirements are not met by my code if it produces the expected output...
25.03.2024
187views
3comments
0
Evgeniia Shabaeva
Level 40
Budapest
Question about the task Magic 8 ball
Java Syntax, Level 9, Lesson 2
Resolved
What's wrong?I've written some code that seems logical to me. Why is it still not meeting the requirements I wonder?
03.04.2024
196views
4comments
0
Evgeniia Shabaeva
Level 40
Budapest
Question about the task Increments
Java Syntax, Level 9, Lesson 7
Resolved
What is the order this code compiles?I'm interested in the order 'b' is calculated here: int a = 3; int b = a++ + (a-- * a++); We've read in the lesson that the 1st priority belongs to parenthesis, so we begin with (a-- * a++), right? The 2nd priority is the unary operator, but which one? The lesson says it works from right to
11.04.2024
157views
2comments
0
Evgeniia Shabaeva
Level 40
Budapest
Question about the task Binary converter
Java Syntax, Level 10, Lesson 2
Resolved
What's wrong with the second method?The task is to write code to convert a decimal to a binary number and vice versa. I've kind of finally written the 'toBinary' method that works but the 'toDecimal' one keeps making an error. I still can't see what I'm doing wrong.
12.04.2024
132views
2comments
0
Ekaterina
Level 28
Tbilisi
Question about the task QR-code reader
Java Syntax, Level 8, Lesson 2
Under discussion
Can't pass last requirement Received: "The task failed to pass testing: Be sure that the program compares arrays using the deepEquals method of the Arrays class." But I am using Arrays.deepEquals in the 30th line of code. Please help me understand what I'm doing wrong.
25.01.2024
362views
6comments
0
hidden #10668264
Level 7
Question about the task Minesweeper (Part 1/16)
Games, Level 0, Lesson 0
Under discussion
Engine symbol unresolved I typed the import statement: import com.codegym.engine.cell.*; but got an error message saying cannot resolve symbol engine. Has anyone come across this issue?
17.09.2020
564views
8comments
0
Djole
Level 41
Belgrade
Question about the task Aggregator (part 6)
Java Collections, Level 8, Lesson 15
Resolved
not sure what is wrong @Override public List getJobPostings(String searchString) { try { Document doc = Jsoup.connect("https://www.linkedin.com/").get(); } catch (IOException e) { e.printStackTrace(); } return Collections.emptyList(); }
18.06.2019
1448views
2comments
0
Jesú
Level 14
Madrid
Resolved
How to refresh tasks in the IntelliJ CodeGym plugin? No new tasks appear, despite new tasks being available from advancing through the course.
07.03.2024
217views
1comment
0
Daniel Njuguna
Level 14
Kiambu
Under discussion
What's wrong with my code?package com.codegym.task.task09.task0902; /* Stack trace revisited */ public class Solution { public static void main(String[] args) throws Exception { method1(); } public static String method1() { method2(); //write your code here StackTraceElement[] st
05.02.2019
1306views
2comments
0
Mayank Chandratre
Level 21
Question about the task Autoboxing
Java Syntax, Level 13, Lesson 1
Resolved
Will it be same?Are the Integer a = new Integer(10); and Integer a = Integer.valueOf(10); commands same?
05.11.2022
368views
3comments
0
Aduroja ayomide Philip
Level 2
Ado ekiti
Under discussion
run it import tkinter as tk def calculate_area(): try: radius = float(entry_radius.get()) height = float(entry_height.get()) area = 2 * 3.14 * radius * (radius + height) result_label.config(text=f"Area of the cylinder: {area}") except ValueError:
10.04.2024
243views
0comments
0
Zubin Nair
Level 7
New Delhi
Question about the task String array in reverse order
Java Syntax, Level 7, Lesson 4
Under discussion
I am not able to understand 3 and 4th requirements I am not able to understand 3 and 4th requirements Pls explain with required input and output Reply asap
18.09.2018
1993views
10comments
0

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