Page 20 | CodeGym online Java course - Help

Jesú
Level 14
Madrid
Resolved
I'm confused about operator precedence I'm confused about a table showing operator precedence. The table is found in this CodeGym article Why does expr++ have more precedence than ++expr? I thought that ++expr increments first and foremost, whereas expr++ updates its value AFTER being used in the operation. Does anyone understand this?
11/4/23
610views
6comments
0
Jurij Thmsn
Level 29
Flensburg
Question about the task Determining locking order
Java Multithreading, Level 7, Lesson 6
Under discussion
Not validating I think the code returns the requested value - I m testing by changing the order of o1 and o2 in the method call here: solution.someMethodWithSynchronizedBlocks(o1, o2); //true solution.someMethodWithSynchronizedBlocks(o2, o1); //false or by changing the order of obj1 and obj2 in the someMethod
1/14/22
689views
2comments
2
Harshit Garg
Level 34
Chandigarh
Question about the task Chasing after types
Java Syntax, Level 13, Lesson 7
Resolved
pls check why doesn't switch work? package en.codegym.task.pro.task12.task1220; import java.util.ArrayList; /* Chasing after types */ public class Solution { public static void main(String[] args) { var elements = new ArrayList<>(); elements.add("Hello"); elements.add(1
11/2/23
433views
5comments
0
Harshit Garg
Level 34
Chandigarh
Question about the task Double curly braces
Java Syntax, Level 13, Lesson 6
Resolved
no compiler error, why wrong?requirement looks like not programmed correctly..
10/29/23
334views
2comments
0
Justin Smith
Level 41
Greenfield, USA
Question about the task Snake (Part 5/20)
Games, Level 0, Lesson 1
Under discussion
Just want to ask clarification on where classes are declared I don't have a problem with code I'm working on, I just want to ask a question about something regarding creating classes. In some cases, like this project, we create classes in separate .java files (apple.java, snake.java, etc). But some of the other tasks we have done previously have us create mul
7/23/21
957views
1comment
1
Jurij Thmsn
Level 29
Flensburg
Question about the task No goofing off
Java Multithreading, Level 5, Lesson 7
Resolved
NullPointer Exception I already looked up the Right Solution - so I already know how to solve the task. I still don't understand why I get a NullPointerException if I write the run() method like this: public class TaskManipulator implements Runnable, CustomThreadManipulator{ private Thread thread; @Override
11/2/21
859views
14comments
1
Van Ha
Level 41
Bodegraven
Question about the task Comments inside XML
Java Collections, Level 3, Lesson 10
Resolved
No clue Don't have any idea how to solve this further, some hints would be appreciated.
3/27/20
1695views
10comments
0
K J LAKSHMI PRASAD
Level 4
kalasalingam University
Question about the task Sum of numbers not divisible by 3
Java Syntax, Level 4, Lesson 4
Under discussion
printing sum of numbers except divisible by 3 public class Solution { public static void main(String[] args) { //write your code h int i=0; int sum=0; while(i<100){ i++; if(i%3==0){ continue; } sum=sum+i;
10/28/23
425views
1comment
0
Jonas
Level 41
Vilnius
Question about the task Caching proxy
Java Collections, Level 7, Lesson 6
Resolved
Please, only one condition How can you pass 7th and 8th conditions at the same time? They're opposite for each other. If you find element in cache, you cannot search for the element in storage(Condition 6), but if you don't search you cannot pass condition 7. Please help, I'm confused.....
3/26/20
1387views
3comments
0
Kyle Akuya (Wicked98)
Level 18
United States of America
Question about the task Binary to hexadecimal converter
Java Syntax, Level 10, Lesson 2
Under discussion
Right Output but not passing task requirements The output I get from this code is correct, but it isn't passing the task requirements (specifically the first two). Why do I keep on having this issue? Please help.
10/27/23
339views
2comments
0
FelixUjo
Level 35
Gijón
Question about the task Splitting a file
Java Core, Level 8, Lesson 5
Resolved
I don't think I understand what void write(byte[] buff,int form, int count) is doing.I don't think I understand what void write(byte[] buff,int form, int count) is doing.
10/24/23
407views
2comments
0
koko
Level 1
Under discussion
efp hack pubg hack efp
10/26/23
277views
0comments
0
Justin Smith
Level 41
Greenfield, USA
Question about the task Knowledge is power!
Java Multithreading, Level 4, Lesson 9
Under discussion
I can get it sorting correctly, but I don't understand the Formatting part at all I vaguely understand what ChoiceFormat does (it says that it's meant for controlling how singular/plurals work, but CG is using it differently here). I understand that there are two arrays, filelimits and filepart, and that the indexes of the former match up with the indexes in the latter. For examp
1/14/22
1138views
3comments
1
- FniJnn -
Level 33
Paris
Question about the task Refactoring, anonymous classes
Java Multithreading, Level 4, Lesson 9
Resolved
How to create a new object of an anonymous class ?Everything is in the title, thanks :)
1/27/20
1563views
4comments
2
Bertalan
Level 10
Question about the task Inheriting methods
Java Syntax, Level 8, Lesson 7
Under discussion
Buggy tasks?I'm maybe doing something wrong, but unless I exit this task and reenter it, it just shows the same class in every file, even for the default starting point. Same with the other inheritance task before this. i just pushed show correct solution in the end and published that
10/22/23
336views
0comments
0
Week Kee
Level 1
Under discussion
Gui java write code in java GUI intellij swing for school management system project
10/16/23
383views
1comment
0
rousal.mart
Level 1
Under discussion
How do I change the programing language?How do I change the programing language?
10/19/23
357views
1comment
0
Nicolas Huet
Level 41
Provins
Question about the task Sometimes anonymity is so nice!
Java Multithreading, Level 3, Lesson 8
Under discussion
Not passing ONE condition, the USER one...Every condition is passing with exactly the same method, but the USER one won't, even if it's correctly displaying everything. Can someone help me? EDIT: there are no " ' " in my real solution, that was just a desperate attempt
8/16/19
1590views
1comment
1
Kyle Akuya (Wicked98)
Level 18
United States of America
Question about the task A cubed cube calculator
Java Syntax, Level 7, Lesson 3
Under discussion
Ninth degree method should work , what is wrong ? I have implemented everything and it appears that the ninth Degree method should work , but I keep on getting that I'm not able to pass the second requirement: The ninthDegree() method must return the result of raising the passed number to the power of nine. What is going wrong for this code?
10/18/23
465views
2comments
0
Sára Göblová
Level 26
Prague
Question about the task Word search
Java Core, Level 10, Lesson 10
Under discussion
it runs smoothly but the verification fails with "the list returned by detectAllWords method is not the right size"I dont understnad why the last condition is not satisfied
2/23/20
1272views
5comments
0
Marcin Olech
Level 41
Kraków
Question about the task MyMultiMap
Java Collections, Level 6, Lesson 10
Under discussion
remove() and keySet() not passing Hey, I have the same output as commented in main (also tested it a bit and everything works fine) but it's not passing. keySet() seems obvious (or not?). @Override public Set keySet() { return map.keySet(); } remove(): @Override public V remove(Object key) {
1/15/20
1778views
5comments
2
Denis
Level 22
Kharkiv
Question about the task Another interruption
Java Core, Level 6, Lesson 10
Under discussion
Last condition. Help Pls give me some advice
6/27/19
1224views
3comments
1
Kyle Akuya (Wicked98)
Level 18
United States of America
Question about the task Creating a two-dimensional array
Java Syntax, Level 6, Lesson 6
Under discussion
How to fix this ? Why am I getting errors? Hello All, I'm still encountering error after running the following code. I'm not sure what I'm missing here. I thought I established all my variable correctly.
10/16/23
396views
1comment
0
Harshit Garg
Level 34
Chandigarh
Question about the task Two iPhones
Java Syntax, Level 11, Lesson 5
Resolved
didnt understand the problem error Second requirement is not being met.. Requirements: • The IPhone class must override the public boolean equals(Object) method. • The equals method must return true for two equal IPhone objects and false for different ones. • The equals method must return false if null is passed to it. it also says
9/18/23
740views
10comments
0
FelixUjo
Level 35
Gijón
Question about the task CRUD
Java Core, Level 7, Lesson 10
Resolved
I do not understand the mentor's recommendations I don't know how to be sure that the Person object is added to the list and how to be sure that the size of the list does not change when the object is updated.
10/14/23
421views
1comment
0
Amantai
Level 47
Shymkent
Question about the task Thread priorities
Java Multithreading, Level 8, Lesson 6
Resolved
Help is needed Why is the task not accepted? All these constructors were produced by IntelliJ IDEA(Alt+Insert), I just added the logic to the corresponding two constructors. Validation result: Error in com/codegym/task/task28/task2805/MyThread.java on line 58 no suitable constructor found for Thread(java.lang.Thr
10/14/23
782views
5comments
0
Inferno
Level 5
Rewa
Question about the task Maximum of entered numbers
Java Syntax, Level 4, Lesson 5
Under discussion
Requirements error All requirements are satisfied but still it's showing error in requirement "System must show the output".
10/14/23
440views
2comments
0
Inferno
Level 5
Rewa
Question about the task We show what we get
Java Syntax, Level 4, Lesson 4
Under discussion
Requirements error output is according to requirement but still requirements not complete
10/4/23
322views
2comments
0
digger
Level 18
CodeGym University in India
Question about the task Second smallest number entered
Java Syntax, Level 4, Lesson 5
Resolved
my solution is correct but its not accepting. idk Why please correct me if I am wrong anywhere.
11/30/22
733views
3comments
0
Anonymous #11149234
Level 6
United States of America
Question about the task Second smallest number entered
Java Syntax, Level 4, Lesson 5
Under discussion
any ideas with my solution? please I am getting some of the tasks but I am missing something here! anyone can help me or give me some ideas?? please
11/5/22
797views
4comments
0

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