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Java 25
All quests
All levels
Any status
Questions about tasks
Hot
Jeff Jeffy
Level 15
Irvine
Question about the task
Creating cats
Java Syntax
,
Level 5
,
Lesson 9
Resolved
Confused
Its so bad I cant attach it Error code: constructor Cat(java.lang.String,int) is already defined in class com.codegym.task.task05.task0517.Cat: Cat.java, line: 27, column: 12 Code: package com.codegym.task.task05.task0517; /* Creating cats */ public class Cat { //write your code here
3/30/19
1953
views
4
comments
0
Anonymous #10428383
Level 12
Seattle
Question about the task
How to avoid Copy+Paste
Java Multithreading
,
Level 4
,
Lesson 6
Under discussion
Running encapsuletd class in intellij how to do it?
E.g. I have one main class that's only calls another class method. That other class has no main method but the executed code. How can I do that in intellij? I can do it using notepad, but in intellij its compile the entire directory where my tasks are, but I just want to run that two specific cl
4/3/19
2058
views
4
comments
0
thithin k v
Level 14
Bangalore
Question about the task
Cats in the Universe
Java Syntax
,
Level 4
,
Lesson 2
Under discussion
how does the programme works
package com.codegym.task.task04.task0407; /* Cats in the Universe */ public class Solution { public static void main(String[] args) { Cat cat1 = new Cat(); Cat.count = cat1.count; //write your code here Cat cat2 = new Cat(); Cat.count = cat2.count;
4/4/19
1536
views
1
comment
0
Emil Olbinado
Level 6
Manila
Question about the task
Product of 10 numbers
Java Syntax
,
Level 3
,
Lesson 4
Under discussion
Getting this error in code analysis "Missing a Javadoc comment"
I have added several comments to test but issue persist. Although not an actual error, I want to understand what actually is this, why it happened and how to resolve. TIA! Missing a Javadoc comment.: Solution.java, line: 13, column: 5
4/3/19
4155
views
7
comments
0
Ovo Leslie
Level 26
Lagos
Question about the task
Arithmetic mean
Java Syntax
,
Level 5
,
Lesson 5
Under discussion
Help show me whats wrong!
Please whats wrong with this code. It's passing all the conditions except the last one :(
2/27/19
1593
views
4
comments
0
Clayton
Level 13
Bedminster
Question about the task
Arithmetic mean
Java Syntax
,
Level 5
,
Lesson 5
Under discussion
Not compiling
public static void main(String args[]) throws NumberFormatException, IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); int sum = 0; int counter = 0; while(true) { int input = Integer.parseInt(reader.readLine()); if(input == -1) break; sum
4/3/19
1465
views
5
comments
0
Hankster
Level 9
Cleveland
Question about the task
Rule of the triangle
Java Syntax
,
Level 4
,
Lesson 4
Under discussion
works with run, not with verify...
My solution works when I use run. I get the window to input three numbers and the code executes cleanly and displays the proper output. When I try to verify, it gives an error saying no input and two errors saying that I forgot a period in the output. ??? Thanks.
2/16/19
1846
views
7
comments
0
corsi
Level 4
Furiani
Question about the task
More conversions
Java Syntax
,
Level 3
,
Lesson 8
Resolved
More conversions
package com.codegym.task.task01.task0131; /* More conversions */ public class Solution { public static void main(String[] args) { System.out.println(getFeetFromInches(243)); } public static int getFeetFromInches(int inches) { int getFeetFromInches = 243; re
4/2/19
1920
views
2
comments
0
Vani
Level 1
Delhi
Question about the task
I think being a programmer is cool
Java Syntax
,
Level 0
,
Lesson 3
Resolved
Where am I doing wrong in this code? Please help me in this.
public class Solution { public static void main(String[] args) { System.out.print("I think "); System.out.print("being a programmer "); System.out.print("is cool"); } }
3/10/19
1915
views
3
comments
0
Sundaram
Level 12
Chennai
Question about the task
Streets and houses
Java Syntax
,
Level 7
,
Lesson 4
Archived
It runs ok but fails on verifying. Can's see what is wrong?
package com.codegym.task.task07.task0706; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; /* Streets and houses */ public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReade
2/4/19
1366
views
3
comments
0
Wojtek
Level 23
Solec-Zdroj
Question about the task
Task No. 4 about integer type conversions
Java Syntax
,
Level 10
,
Lesson 4
Under discussion
What i should to do here?
Could you give me other way to change int nine to char?
1/26/19
1598
views
1
comment
2
Thomas
Level 12
Gent
Resolved
Error: The removeAllSummerPeople() method not working
I can't find the problem. Can anyone help me with this one? public static void removeAllSummerPeople(HashMap map) { Iterator> iterator = map.entrySet().iterator(); while (iterator.hasNext()){ Map.Entry pair = iterator.next(); Date birth = pair.getValu
3/27/19
1075
views
3
comments
0
Rad
Level 8
Maidstone
Question about the task
Changing functionality
Java Syntax
,
Level 7
,
Lesson 12
Under discussion
i need help
my code is veryfied but when i execute showing as java.lang.NullPointerException: Solution.java, method main, line: 20 An attempt was made to access an uninitialized object (Null).
11/13/18
1529
views
4
comments
1
lordheraldor
Level 23
Newark
Question about the task
Prices
Java Core
,
Level 8
,
Lesson 11
Under discussion
I'm a little lost as to what's wrong with my solution.
Is there something I'm not taking into consideration? As far as I can tell the code should work ok.
3/22/19
1354
views
3
comments
0
Alex Jones
Level 4
Question about the task
Kind words for the teacher
Java Syntax
,
Level 0
,
Lesson 4
Resolved
Not sure how you can put "clever in the code while matching the display
how do you do this task and why does the "The text should end in "clever"." show up?
4/2/19
1502
views
4
comments
0
jim smith
Level 22
Cedar Park
Question about the task
Iterating through a file tree
Java Collections
,
Level 1
,
Lesson 2
Archived
Intellij plugin missing new questions
Is the IntelliJ plugin updated? I think I downloaded the updated one 3.27 but I still don't see any projects in the 2 new modules. Do I need to git pull something from somewhere I don't remember exactly if I needed to do anything else when I got this running the first time.
4/2/19
1357
views
1
comment
0
Emil Olbinado
Level 6
Manila
Under discussion
What is the best IDE for Beginners?
Intellij vs Eclipse vs Visual Studio Code? Your opinion guys? TIA
4/1/19
1423
views
3
comments
0
Stephen D'Acquisto
Level 5
Tampa
Question about the task
Contract
Java Syntax
,
Level 1
,
Lesson 6
Under discussion
For Loop?
This may be skipping way far ahead for this exercise, but what would a general 'for' loop solution look like for this problem? Or would that be super impractical given that everything is technically String instead of integer values? Just curious.
4/2/19
1097
views
1
comment
0
Zbigniew
Level 23
Dabrowa Tarnowska
Question about the task
Reinforce the adapter
Java Core
,
Level 9
,
Lesson 3
Resolved
Correct output but it doesn't pass verification
I've tested my getDialString method for the phone numbers from examples and it shows correct output, but it doesn't pass the verification. The recommendation from mentor is: " The getDialString() method should return a String containing "callto://+" and a phone number with all characters removed ex
3/27/19
2279
views
5
comments
0
Ahmed Mayan
Level 4
New York City
Question about the task
Multiplication table
Java Syntax
,
Level 3
,
Lesson 6
Under discussion
How to do the code right? I got every task right except the last requirement.
package com.codegym.task.task03.task0314; /* Multiplication table */ public class Solution { public static void main(String[] args) { System.out.println("1 2 3 4 5 6 7 8 9 10"); System.out.println("2 4 6 8 10 12 14 16 18 20"); System.out.println("3 6 9 12 15 18 21 24 27
4/1/19
1559
views
1
comment
0
Alexandr Golikov
Level 5
Podol'sk
Under discussion
Idea capability
Please add a capability of plugin to IntelliJ IDEA 2019
3/31/19
1238
views
2
comments
1
sean
Level 8
Question about the task
Describing numbers
Java Syntax
,
Level 4
,
Lesson 7
Archived
Alternative idea
Hi, Although I figured it out with the simple logic of how many digits are in a specific number range. I initially thought that we could solve this by dividing the stream by 10 and storing it in a variable which should represent the amount of digits, we should then be able to use this to check the
4/1/19
1277
views
1
comment
0
Paweł
Level 15
Gromnik
Question about the task
Arithmetic mean
Java Syntax
,
Level 5
,
Lesson 5
Resolved
Something wrong. Help!
package com.codegym.task.task05.task0507; /* Arithmetic mean */ import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.Scanner; public class Solution { public static void main(String[] args) throws Exception { //BufferedReader bu = new BufferedReader(new I
3/30/19
1417
views
2
comments
2
Nina
Level 3
Melbourne
Question about the task
Square of a number
Java Syntax
,
Level 1
,
Lesson 8
Archived
calling in main method
I failed. I tried much but I can not do it as I don't know how to call somtehing in main method and .. please show me how to do it. I can not find any similar example in the material. There was a similar task before this one that I failed it as well. Thanks this is my solution: package com.codegym.t
3/31/19
2177
views
2
comments
0
Jeremiah Samuel Krakowski
Level 17
Austin, TX
Question about the task
Default values
Java Core
,
Level 5
,
Lesson 9
Under discussion
Code runs perfectly, but does not pass!
My code does what is asked, but is not passing for some reason.
3/31/19
1569
views
2
comments
0
Khurram
Level 16
Lahore
Question about the task
Minimum and Maximum
Java Core
,
Level 1
,
Lesson 11
Under discussion
Please Help
The code seems to be working fine, but the verification system is not accepting the solution: Don't change the main - I haven't The program must return the correct result - It does :\
9/22/18
2224
views
16
comments
0
Wilder
Level 4
Alajuela
Question about the task
Plan to conquer the world
Java Syntax
,
Level 3
,
Lesson 8
Under discussion
whats wrong with my code ??? :(
3/30/19
1486
views
3
comments
0
Wojtek
Level 23
Solec-Zdroj
Question about the task
Counting words
Java Core
,
Level 9
,
Lesson 5
Under discussion
What is wrong?
Output seems to be good
3/28/19
1787
views
12
comments
0
Iasu
Level 18
Question about the task
One large array and two small ones
Java Syntax
,
Level 7
,
Lesson 4
Under discussion
System.arraycopy() method dosent work in these one maybe?
In IntelliJ, it's running fine, but here it doesn't work! Am I missing something here..?
2/10/19
1660
views
2
comments
0
Chitransh Derashri
Level 1
Noida
Question about the task
No comments needed
Java Syntax
,
Level 0
,
Lesson 8
Under discussion
the last condition is not fulfilled in any case.
how to solve this question.
10/25/18
1552
views
4
comments
0
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