Page 72 | CodeGym online Java course - Help

Yomi Addey
Level 8
Baltimore
Question about the task R or L
Java Syntax, Level 7, Lesson 9
Resolved
2nd condition not passing It removes all the "r" words yet it still doesn't pass. I added the "else if" part in hopes it would fix it, but that doesn't do anything either. Please help! Thanks!
6/18/21
581views
4comments
0
Yomi Addey
Level 8
Baltimore
Question about the task R or L
Java Syntax, Level 7, Lesson 9
Resolved
"Java heap space" error?Why do I get a "java heap space" error, and how do I fix it?
6/15/21
637views
1comment
0
ayhem bouabid
Level 25
Tunis
Question about the task Replacing numbers
Java Core, Level 9, Lesson 11
Under discussion
I am not sure what is the wrong with my code. Can someone help me debug it?These are explanatory comments on the modifyLine method : public static String modifyLine(String line){ // the word variable stores each word in the line : the string produced until we meed a non-alphanumerical character StringBuilder word = new StringBuilder(); // the res
6/17/21
785views
1comment
0
Gellert Varga
Level 23
Szekesfehervar
Question about the task Ironing
Java Core, Level 7, Lesson 10
Resolved
What does a Class-level lock mean?1) What is the point of class-level lock of the Iron class? This class does not contain any methods. Then what does it lock in fact?? 2) Why is the (Person.class) lock not correct solution? The output appeared in the correct order (as if there were only 1 piece of iron). 3) When I wrote this: sync
5/14/21
899views
11comments
2
Tayyab Mubeen
Level 16
Lahore
Question about the task We're all friends here, even the exceptions
Java Syntax, Level 9, Lesson 8
Resolved
i tried my best but still not able to done this...!!!i didn;t understand how can i do this...need help
10/21/18
3762views
17comments
0
MecoS
Level 16
Question about the task Stack trace revisited
Java Syntax, Level 9, Lesson 2
Under discussion
Help, maybe i didn't understand question Maybe is necessary a break point?
12/9/19
1497views
2comments
0
Andrei
Level 41
Question about the task Build a tree (part 5)
Java Collections, Level 1, Lesson 15
New
What wrong with my version of the remove method?The remove method starts at line 100: @Override public boolean remove(Object o) { if (o.getClass() != String.class) throw new UnsupportedOperationException(); //After using the remove method to remove the last added node from the tree, the size method should return N-1.
6/17/21
710views
0comments
0
Jurij Thmsn
Level 29
Flensburg
Question about the task Deep cloning of a map
Java Multithreading, Level 1, Lesson 8
Under discussion
Why use euals() and hashCode() ?I passed this exercise without implementing the equals() and hashCode() methods. I simply overrode the clone() method of the Solution class in which I cloned the "users" map of the original object to the cloned object's "users" field. In the "right solution" the equals() and hashCode() methods are
6/16/21
685views
2comments
0
SirJava88
Level 5
Canadensis
Question about the task Crossing the road blindly
Java Syntax, Level 4, Lesson 4
Resolved
I can't understand what I'm doing wrong here. The code is outputting correctly with the right range. package com.codegym.task.task04.task0416; /* Crossing the road blindly */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); double minsInHour =
6/4/21
966views
4comments
0
Zach
Level 22
Fort Collins
Question about the task Big Ben
Java Core, Level 6, Lesson 7
Under discussion
Can't get the first task to pass?How do I make sure that it only runs for about one second?
6/16/21
588views
1comment
0
Caden J
Level 2
Atlanta
Question about the task Where does a Person come from?
Java Syntax, Level 2, Lesson 2
Under discussion
I dont understand what this whole "Person" thing is ggfsar
2/23/20
1339views
4comments
0
Raj Mishra
Level 2
India
Question about the task Neo
Java Core, Level 3, Lesson 11
Under discussion
I dont understand the cause of failure My program is returning as expected and I am also following the same procedure. But still 2 cases are failing, dont know why
6/16/21
668views
1comment
0
Maxim Raitin
Level 20
Tomsk
Question about the task The early bird gets the worm
Java Core, Level 6, Lesson 13
Resolved
I don't understand output How JVM(JDK) split words?? Or is it just random splitting (because all threads are random)?
6/16/21
742views
1comment
0
Alvin B
Level 8
Newark
Question about the task Min and max in arrays
Java Syntax, Level 7, Lesson 12
Under discussion
What is wrong?What is wrong here? Everything seems to work according to requirements. Please help. Thanks in advance.
9/29/20
688views
3comments
0
Jonathan
Level 12
Esslingen
Question about the task Min and max in arrays
Java Syntax, Level 7, Lesson 12
Resolved
Its running perfect ??? public class Solution { public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); int[] array = new int[20]; int maximum = 0; int minimum = 500000000; for(int i=0;i<20;i+
10/16/20
938views
4comments
0
Jurij Thmsn
Level 29
Flensburg
Question about the task Adding a file to an archive
Java Collections, Level 1, Lesson 6
Resolved
Getting frustrated...I googled different ways how to unzip a file etc, but the information i find is so different and I really don't know how to make this work. On my computer the program seems to work, I end up getting a zip file which contains a.txt , b.txt and a new/ folder with result.mp3 . I am so frustrated, b
5/12/21
877views
11comments
0
Sansho
Level 19
Bordeaux
Question about the task CRUD
Java Core, Level 7, Lesson 10
Under discussion
I can't understand why only the 2 firsts requ. are greens The only thing I can understand is when I "-d " a person and then ask for its infos, it "crashes" cuz of Birthday is null (and even there, I tried to make my program to ignore it but...it doesn't) . So if someone can help me, it will be soooo great!
6/15/21
529views
2comments
0
hosniaro
Level 27
Heiloo
Question about the task Build a tree (part 1)
Java Collections, Level 1, Lesson 15
Under discussion
How is this example solved?What do you type in a search engine?
6/14/21
752views
1comment
0
Hemel
Level 7
London
Question about the task Describing numbers
Java Syntax, Level 4, Lesson 7
Archived
I'm not sure why off numbers are not being shown.I'm using the same syntax as the previous task where we identified even & odd numbers but it's not identifying the odd numbers. Is there an issue with the order? Thanks!
6/15/21
737views
6comments
0
Asia
Level 19
Bydgoszcz
Under discussion
what's wrong?It's just like their solution, and compiles in Intelij, but not here. Why is that? I'm getting NullPointerException
6/15/21
700views
1comment
0
Andrei
Level 41
Question about the task Search for hidden files
Java Collections, Level 1, Lesson 4
Resolved
How does the visitFIleFailed method work?We have the visitFileFailed method and the body is below. Considering that it only add the argument to the List and then returns skip subtree, where does the check for failure take place? I don't understand. Shouldn't there be an if clause somewhere? ex. if file could not be accessed then add to fi
6/15/21
817views
4comments
0
Karolis Garšva
Level 16
Gravesend
Question about the task Creating cats
Java Syntax, Level 5, Lesson 9
Resolved
whats wrong?it says that this constructor already exists or something like that...
6/14/21
753views
4comments
0
Yomi Addey
Level 8
Baltimore
Question about the task Longest string
Java Syntax, Level 7, Lesson 6
Resolved
Weird error This was part of the error: " java.lang.NullPointerException at com.codegym.task.task07.task0708.Solution.main(Solution.java:20) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)" I have no clue what
6/14/21
549views
2comments
0
Maxim Raitin
Level 20
Tomsk
Question about the task Shall we play?
Java Core, Level 6, Lesson 13
Under discussion
It works in IDE Hello, Why it doesn't accepted in CodeGym?
6/15/21
550views
1comment
0
Zach
Level 22
Fort Collins
Question about the task Adapter
Java Core, Level 9, Lesson 3
Under discussion
Not passing sixth validation.FileOutputStream's write() method only takes bytes and int's as arguments so how are you supposed to use Strings without converting it? Thanks.
6/14/21
498views
1comment
0
Yomi Addey
Level 8
Baltimore
Question about the task Cat relations
Java Syntax, Level 6, Lesson 11
Resolved
New issue: String cannot be converted "com/codegym/task/task06/task0621/Solution.java:23: error: incompatible types: java.lang.String cannot be converted to com.codegym.task.task06.task0621.Solution.Cat Cat cat4 = new Cat(catName4, catName2, null);" I got rid of the "missing return statement issue" (I think), but now I see wha
6/14/21
658views
2comments
0
Mina Nabil
Level 17
Sydney
Question about the task We don't need repeats
Java Syntax, Level 8, Lesson 8
Under discussion
Hi, whats wrong with my code ?Hi, whats wrong with my code ? It doesn't pass verification ?
3/3/21
1083views
2comments
0
John
Level 17
Mansfield
Question about the task OOP: Books
Java Core, Level 5, Lesson 2
Under discussion
this I just finished the task, a little tip. Use this operator :)
6/11/21
470views
0comments
1
David Haines
Level 13
La Crosse
Question about the task Buggy initializeIdAndName
Java Core, Level 3, Lesson 2
Under discussion
Thank you all for the comments below.Just wanted to say thank you to all who commented on this lesson. I have to admit that I was very confused about what this wanted. I ended up downloading the correct solution and comparing against my version while factoring in the comments below. Because of all this, I was able to 'reverse engine
6/13/21
581views
0comments
1
ImDevin
Level 15
Old Town
Under discussion
logic behind this method - 1420 Those who used this way of solving the task, could you explain the logic/flow of this? I understand this is recursion, but switching the x & y and diving by the remainder, etc. I just can't follow it. Much appreciate it.
6/11/21
1042views
5comments
0

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