Page 103 | CodeGym online Java course - Help

Liliane Top
Level 24
Amsterdam
Question about the task Finding data inside a file
Java Core, Level 8, Lesson 11
Resolved
Just for a better understanding Why is this code failing the test?
1/8/21
433views
1comment
0
Liliane Top
Level 24
Amsterdam
Question about the task Finding data inside a file
Java Core, Level 8, Lesson 11
Resolved
I copied the solution and I still fail the test Or am I missing something?
1/8/21
420views
1comment
0
Andrei
Level 41
Question about the task CRUD
Java Core, Level 7, Lesson 10
Under discussion
I don't understand why it isn't creating a new person to the list when passing the provided arguments in the example Hello, I go to Run -> Edit configurations -> I add the program arguments -c Washington m "04 15 1990". This, normally should create a new person and add it to the list, no? At least this is what I understand from the switch case "-c". Then, I go back to Run -> Edit configurations -> I
1/8/21
627views
7comments
0
Daniel Whyte
Level 17
Question about the task Crossing the road blindly
Java Syntax, Level 4, Lesson 4
Under discussion
t % 5 I don't understand what t % 5 actually does and why this seems to then mean the higher numbers are then covered.
1/7/21
472views
1comment
0
Liliane Top
Level 24
Amsterdam
Question about the task Building a file
Java Core, Level 8, Lesson 11
Resolved
How does the buffer work?I don't understand why the the buffers don't overwrite the existing text. If I write several buffers to the same outputfile. How does it know where to start? FileOutputStream fos = new FileOutputStream(fileComposite);//if I do not set the "append" to true //iterate over the map with filen
1/8/21
824views
4comments
0
Dinesh
Level 7
Delhi
Question about the task Maximum of four numbers
Java Syntax, Level 4, Lesson 6
Under discussion
Last condition not satisfied import java.io.*; public class Solution { public static void main(String[] args) throws Exception { //write your code here BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String n1 = reader.readLine(); int num1= Integer.parseInt(n1)
1/6/21
724views
11comments
0
Liliane Top
Level 24
Amsterdam
Question about the task Building a file
Java Core, Level 8, Lesson 11
Resolved
Very confused as what is wrong The validation is a bit off. As it claims I do not close the stream. But maybe I am not allowed to use a TreeMap for this task?
1/7/21
473views
1comment
0
orangepeeler
Level 14
Not in list
Question about the task Sorting even numbers from a file
Java Core, Level 3, Lesson 11
Resolved
What's wrong with my code?I am having trouble fulfilling the fourth condition, even though everything looks fine when I debug (lines 25 -31). Please help! thanks in advance
1/2/21
667views
2comments
0
Dmitri
Level 22
Seversk
Question about the task CRUD
Java Core, Level 7, Lesson 10
Under discussion
Any ideas what is wrong?Looks like my code is doing what is intended...
1/6/21
448views
5comments
0
gopalkingsuper@gmail.com
Level 3
मुंगेली
Under discussion
Dark Matter?please give me dark matter. I completed all task. please.........
1/7/21
463views
0comments
0
Andrei
Level 41
Question about the task Synchronized president
Java Core, Level 7, Lesson 4
Under discussion
If the exercise alraeady gives out TRUE when run, what is the point of the static block and the synchronized block?Can someone please give more details as to what they are trying to teach with this exercise? public class OurPresident { private static OurPresident president; private OurPresident() { } static { synchronized (OurPresident.class){ president = new OurPresid
1/7/21
636views
4comments
0
Riya
Level 15
Indore
Question about the task Bridges
Java Core, Level 4, Lesson 8
Resolved
separate files...!how do I create separate files on smartphone pls help...
12/12/20
512views
2comments
0
Maxim Raitin
Level 20
Tomsk
Question about the task R or L
Java Syntax, Level 7, Lesson 9
Resolved
It works on Intellij IDEA It works on Intellij IDEA public class Main { public static void main(String[] args) throws Exception { ArrayList list = new ArrayList(); list.add("rose"); list.add("love"); list.add("lyre"); list.add("adamos"); list.add("phill"); list.a
1/7/21
677views
5comments
0
Anonymous #10436715
Level 38
Question about the task Restaurant (part 10)
Java Multithreading, Level 9, Lesson 15
Under discussion
I have no idea where I'm wrong.Does anybody have the validator's input data and required response? I checked with various input data and all seemed good for me...
5/21/20
792views
1comment
0
Yildi06
Level 1
Stuttgart
Under discussion
Bei der Aufgabe muss ich das Geburtsjahr herausfinden und wie kann das hier richtig sein, ich dachte man kann nur mit ints rechnen, aber hier wird keins angegeben package de.codegym.task.task01.task0103; /* Mein junger Freund */ public class Solution { public static void main(String[] args) { System.out.println(3126 - 8); } }
5/22/20
585views
0comments
0
Mohan Amilineni
Level 22
Brisbane
Question about the task Tracking changes
Java Core, Level 9, Lesson 11
Under discussion
Not able to understand requirement completely, need help!Hi, Tried multiple solutions, couldn't resolve it. Also I couldn't find a complete working solution in colleagues comments for this task. Please post a complete working solution, so that I can do reverse engineering and then try to understand the requirement. Honestly, the requirement is bit conf
5/25/20
460views
0comments
0
Martin Adamec
Level 1
Nachod
Question about the task Finding data inside a file
Java Core, Level 8, Lesson 11
Under discussion
Why does it not validate?What's wrong? Both of my solutions seem to work correctly when I test them manually.
5/25/20
567views
0comments
0
AnnemiekFF
Level 41
Breda
Question about the task Recursion for mathematical expressions
Java Collections, Level 4, Lesson 2
Under discussion
Tweaked some more, still not correct?I am sure this is becoming waaaay more complicated than it should be. I have tweaked it again, as I found a few cases that didn't work. Now I still can't pass it, but I have no clue where to look for next?
5/27/20
641views
0comments
0
Brandon Leirer
Level 7
Keller
Question about the task Describing numbers
Java Syntax, Level 4, Lesson 7
Archived
if you are having trouble with the last requirement...try changing the input to a number outside of the range like (1000, 0, or -1) and see what gets returned in output. That will set you on the right path.
5/28/20
666views
0comments
0
Naweed
Level 2
Kabul
Question about the task Pay raise
Java Syntax, Level 2, Lesson 2
Under discussion
Finally Find it package com.codegym.task.task02.task0205; /*
5/30/20
543views
0comments
0
Lam Jok
Level 10
Under discussion
The CodeGym server is unavailable. Wait a little, restart IntelliJ IDEA and try again Can someone help me with this error. Thanks in advance!
5/30/20
564views
0comments
0
Prassha
Level 24
Chagford
Question about the task Request parser
Java Core, Level 5, Lesson 12
Under discussion
Hi, please help me. I am getting the correct output with url string (line 27 )but not getting the same output with when I use s = reader.readLine(); line 24. s = reader.readLine(); this is causing entire program to crash. Tried with Scanner also.
5/31/20
451views
0comments
0
Luke Chapman
Level 3
Braddon
Under discussion
Cant see the output on intellij with CodeGym Plugin This is crucial as you cant debug your code if you dont know what it's outputting.
5/31/20
457views
0comments
0
Niklas Braun
Level 33
Freiburg
Question about the task Make a word chain
Java Multithreading, Level 2, Lesson 9
Under discussion
Can't figure out what's wrong?Program works with own implementations, but the last two requirements are still not checked?
5/31/20
481views
0comments
0
Dinesh
Level 7
Delhi
Under discussion
I am unable to print the null value programmatically of the following statement.If a variable of a reference (composite) type isn't storing a reference to an object, then it stores what is known as a 'null reference'. IF String s; & String s=null; are same than why i am not getting null as output. Tried 2 Ex as follows but didn`t get null as output. 1. class Person{
1/6/21
489views
5comments
0
Dinesh
Level 7
Delhi
Under discussion
I want output upto 2 decimal place only. 31.40 //The output is 31.400000000000002 public class Codegym { public static void main(String[] args) { printCircleCircumference(5); } public static void printCircleCircumference(int radius) { //write your code here double result = 2*3.14*radius; System.out.p
1/7/21
683views
5comments
0
Solanki Dhruv
Level 18
Surat
Question about the task Identical words in a list
Java Syntax, Level 10, Lesson 11
Under discussion
I got right result...but still fail on website.?
12/2/18
1662views
6comments
0
Ivan Duka
Level 22
Winnipeg
Question about the task Array of string lists
Java Syntax, Level 10, Lesson 11
Under discussion
How to Create an Array of Parameterized Types Hi! Please help, I am not sure why it does not pass the tests. I strongly suspect that it is about line 20: ArrayList[] result = (ArrayList[])new ArrayList[size]; I tried several ways to declare this array but no luck. As per Oracle's documentation, we Cannot Create Arrays of Parameteriz
4/7/19
2791views
5comments
5
Gellert Varga
Level 23
Szekesfehervar
Under discussion
Reference conversions: widening and narrowing From the Oracle's website: "A widening reference conversion exists from any reference type S to any reference type T, provided S is a subtype of T. " "Narrowing reference conversions: From any reference type S to any reference type T, provided that S is a proper supertype of T. " 1.) On base of th
1/6/21
797views
4comments
0
Odeh Osayande Vincent
Level 1
Limerick
Under discussion
algorithm Design an Algorithm for the following Java application that asks a customer to: enter the quantity of items requested from a mail-order catalogue, and the price of each item. The program will then return & display the totalCost of the required items. The results are formatted to
5/1/20
826views
0comments
0

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