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Java 25
All quests
All levels
Any status
Questions about tasks
Hot
Yash
Level 15
Sugar Hill
Question about the task
Four mistakes
Java Core
,
Level 3
,
Lesson 2
Under discussion
com.codegym.task.task13.task1305.Solution.Dream is abstract; cannot be instantiated. file com/codegym/task/task13/task1305/Solution.java, line 12, position 165
cannot be instantiated because it is abstract but it's not abstract. public class Solution { public static void main(String[] args) { System.out.println(new Dream().HOBBY.toString()); System.out.println(new Hobby().toString()); } interface Desire { } public
11/3/19
1533
views
2
comments
0
Noob_Coder
Level 22
Springfield
Question about the task
Make a family
Java Syntax
,
Level 8
,
Lesson 11
Under discussion
no idea how to continue
I don't know how to continue very well,very appreciate if someone can point out what's wrong and how the code works especially how to use Human constructor and to string method to create the required variables.
11/17/20
950
views
1
comment
0
Premachandran
Level 35
Ernakulam
Question about the task
Archiver (part 1)
Java Multithreading
,
Level 7
,
Lesson 15
Under discussion
Where am I wrong?
I tried different ways but one condition fails.
2/7/20
1216
views
2
comments
2
Noob_Coder
Level 22
Springfield
Question about the task
Month number
Java Syntax
,
Level 8
,
Lesson 11
Resolved
What's wrong?
dk what's wrong to this simple task...
11/17/20
585
views
2
comments
0
Maciej Sokołowski
Level 1
Warsaw
Question about the task
Moon Lander (Part 6/23)
Games
,
Level 0
,
Lesson 4
Resolved
landscape field initializing failed
I don't see LANDSCAPE in the ShapeMatrix class. Where can I find it? Should I create it?
11/17/20
461
views
1
comment
0
Lgd
Level 20
London
Question about the task
Tracking changes
Java Core
,
Level 9
,
Lesson 11
Under discussion
my "lines" list looks good as per requirements so I just cannot see what is wrong here ? help would be v. gratefully received
my "lines" list looks good as per requirements so I just cannot see what is wrong here ? help would be v. gratefully received
11/6/20
581
views
2
comments
0
Cristian
Level 13
Ploiesti
Question about the task
Lonely arrays interact
Java Syntax
,
Level 7
,
Lesson 4
Under discussion
The last requirement is not verified
Hi guys! This requirement is not verified: The program must record the lengths of the strings in the number array, and then display them on the screen. Why? Thanks a lot! package com.codegym.task.task07.task0703; import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.Arr
11/17/20
728
views
5
comments
0
Usman Jutt
Level 4
Pir Mahal
Question about the task
Sum of the digits of a three-digit number
Java Syntax
,
Level 3
,
Lesson 12
Resolved
What is wrong with this did not understand? plz help me
What i do/
11/3/18
2683
views
4
comments
0
Martin Evtimov
Level 22
Chicago
Question about the task
Fix four mistakes
Java Core
,
Level 4
,
Lesson 8
Under discussion
Help a brother out.
The error "The initList method must fill the resulting list with random values". Any hints?
11/4/18
2127
views
5
comments
0
lukesky
Level 11
Zurich
Question about the task
Month number
Java Syntax
,
Level 8
,
Lesson 11
Under discussion
No idea why it doesn't pass he last condition
No idea why it doesn't pass he last condition
11/16/20
535
views
2
comments
0
Shadow
Level 7
Hogsmead
Question about the task
ConsoleReader class
Java Syntax
,
Level 6
,
Lesson 8
Under discussion
Having a problem :(
console is showing: " class, interface , enum missing ........ ...................... line 47" Its showing the sign : " ^ " after the word * void " in line 47 help.....
11/15/20
699
views
3
comments
0
Cristian
Level 13
Ploiesti
Question about the task
Cat relations
Java Syntax
,
Level 6
,
Lesson 11
Under discussion
Father and Mother print failing validation. Why?
Hi guys! Help me, please! Thank you in advance! Father and Mother print failing validation. Why? package com.codegym.task.task06.task0621; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; /* Cat relations */ public class Solution { public stati
11/14/20
490
views
2
comments
0
Gellert Varga
Level 23
Szekesfehervar
Question about the task
Task No. 1 about integer type conversions
Java Syntax
,
Level 10
,
Lesson 4
Under discussion
If (int)(Infinity)==Integer.MAX_VALUE, then (short)(Infinity) why doesn't equal to Short.MAX_VALUE?
The result of the (1.0 / 0) division is: "Infinity". If we do the "type cast" operation on the above expression, to "byte" or to "short", then the result is -1. Why? And if we do cast it to "int" or to "long", then the result is their MAX_VALUE. OK, it has sense. But why is this difference? In o
6/26/20
702
views
1
comment
1
Emre Erkaslan
Level 0
Istanbul
Question about the task
Space Invaders (Part 18/34)
Games
,
Level 0
,
Lesson 6
Under discussion
Help please
I am at the point where I am losing grasp of what is being accomplished with what code. However this code gives error: com/codegym/games/spaceinvaders/part18/gameobjects/Ship.java:27: error: incompatible types: int[] cannot be converted to int[][] setMatrix(viewFrames[0]);
11/15/20
934
views
1
comment
0
Albert
Level 6
Hong Kong
Question about the task
Seasons on Terra
Java Syntax
,
Level 4
,
Lesson 4
Under discussion
Any smart solution?
// The system passes the code, but I am wondering if there is a smarter solution // I tried to use ||, but seems it only works or the binary "a or b" case, but not for "a or b or c" case package com.codegym.task.task04.task0411; /* Seasons on Terra */ public class Solution { public static v
11/16/20
756
views
6
comments
0
Albert
Level 6
Hong Kong
Question about the task
Name register
Java Syntax
,
Level 4
,
Lesson 2
Under discussion
Cat.fullName = fullName v.s. this.fullName = fullName
sometimes the tasks could be met by typing Cat.fullName = fullName, sometimes this.fullName = fullName what is the difference? plus to non-programmers, level 4 concerning the visibility is suddenly very tough, even if we try to gather additional information online
11/13/20
848
views
4
comments
0
Andrei
Level 41
Question about the task
Ten cats
Java Syntax
,
Level 9
,
Lesson 11
Under discussion
I have solved the task, but I don't understand the difference between 2 lines of code
Hello, so the point was to finish the method that converts a map to a set. Initially I tried to initiate a Set and then put the values of the map in the set, like this: Set catSet = new HashSet<>(); catSet = map.values(); However, this would prompt an error that I am trying
11/16/20
944
views
6
comments
0
Seferi
Level 22
Question about the task
Introducing tags
Java Core
,
Level 9
,
Lesson 11
Resolved
It works on my IDE but failing the last condition
I know what you are going to say.. I took the easy way out and used the Jsoup library for this task.. As a punishment, it's failing the last condition. I appreciate the help.. Thanks..
11/13/20
698
views
8
comments
0
Roman Grygorczuk
Level 19
Cracow
Question about the task
Shuffled just in time
Java Syntax
,
Level 7
,
Lesson 12
Resolved
Cannot pass validation
Guys, Cannot pass validation. Program works corrctly
11/14/20
846
views
5
comments
0
hidden #10263621
Level 4
Question about the task
Somehow average
Java Syntax
,
Level 4
,
Lesson 16
Resolved
Can someone help me with what is wrong in this code?
Can someone help me with what is wrong in this code?
9/24/18
2083
views
5
comments
0
Laurap5
Level 9
Vilnius
Question about the task
Shortest or longest
Java Syntax
,
Level 7
,
Lesson 6
Resolved
Please help :)
If in the first place I enter the shortest string before the longest, It's working :) If in the first place I enter the longest string before the shortest. It's working.
12/4/18
2301
views
8
comments
2
David Close
Level 17
London
Question about the task
Expressing ourselves more concisely
Java Syntax
,
Level 7
,
Lesson 6
Archived
whats wrong with final
final condition will not clear
11/5/20
670
views
5
comments
0
Bartek
Level 10
Dukla
Under discussion
Nie czyta mi Stringa w zadaniach
Nie wiem dlaczego nie czyta mi wgl klasy String.
11/11/20
497
views
2
comments
0
Nicholas Corten
Level 4
Antwerp
Question about the task
Predictions
Java Syntax
,
Level 3
,
Lesson 8
Resolved
Hi I'm stuck on this one. Any help is welcome :)
package com.codegym.task.task03.task0319; /* Predictions */ import java.io.*; import java.util.Scanner; public class Solution { public static void main(String[] args) throws Exception { Scanner scan = new Scanner(System.in); String name = scan.nextLine(); int number1
11/4/20
798
views
3
comments
0
Nicholas Corten
Level 4
Antwerp
Question about the task
Plan to conquer the world
Java Syntax
,
Level 3
,
Lesson 8
Resolved
I don't see what I'm typing wrong
11/4/20
937
views
3
comments
0
Michał
Level 11
Warsaw
Question about the task
Kind Emma and the summer holidays
Java Syntax
,
Level 8
,
Lesson 8
Resolved
Trying to solve this using Streams API
Hello guys! I was able to solve this task by using just an old fashioned 'if' and 'while' loop but I was thinking about approaching this issue differently but couldn't make it work. Could you please help me figure out what I should change in my code here to make it work and solve this task 0816 us
11/14/20
607
views
3
comments
0
Vijay Rangan
Level 5
Jakarta
Question about the task
Parenthetical brainteaser
Java Syntax
,
Level 3
,
Lesson 4
Resolved
not getting 382
im not getting 382 ...can any one explain what to do...and i have tried (1 + 2 * (3 + 4 * (5 + 6 * 7)) + (8 * (9 + 10))); too and its getting error in "The sequence of digits and arithmetic operations can not be changed."
9/30/18
5099
views
18
comments
0
Rory King
Level 4
Budapest
Under discussion
Please Help
i run the programme on intelij and have no issues but on the task i get an error please help package com.codegym.task.task03.task0303; /* Currency exchange */ public class Solution { public static void main(String[] args) { //write your code here convertEurToUsd(50 , 2.5);
11/15/20
545
views
1
comment
0
Chris
Level 19
Newark
Question about the task
Greater than 10? You're not a good fit for us
Java Syntax
,
Level 8
,
Lesson 8
Under discussion
I have no idea how to finish.
I cant pass the last requirement. Someone please help .
11/15/20
536
views
1
comment
0
Lawson
Level 29
Lagos
Question about the task
Hippodrome (part 12)
Java Multithreading
,
Level 1
,
Lesson 16
Resolved
Pls help
I know this question is supposed to be easy but please help me
9/11/20
737
views
11
comments
0
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