Help with tasks

So, it says below "Along the main diagonal, all elements are true because everybody knows himself or herself." - this I assume is the last element from each generateRelationship array element. How am I supposed to interpret the following paragraph? " The intersection of rows and columns indicates w

I don't understand why the order has to be this way? Please explain.

The code works on my pc but it always fails the validaton. Any idea where could be the mistake?

public class Solution { private static ArrayList strings; static int c_len = 0, o_len = 0; public static void main(String[] args) throws Exception { strings = new ArrayList<>(); ArrayList index = new ArrayList<>(); for (int i = 0; i < 5; i++) {

Don't know how else to put it. This is what I came up with. Nothing prints out at all. I have a suspicion that the problem is that the start() method has been overridden, and since it's not actually calling start() but my custom start(threadName) method, it isn't actually turning it into a thread. I

I can't understand why do we synchronize get and put methods if ProducersTask and ConsumerTask run methods's already have a synchronized block: Why do we synchronize those: public synchronized int get() public synchronized void put(int value) If we put them in synchronized blocks as in: whil

Hi there, What are these "::" symbols being used for? I found them in universityGroup.students.forEach(System.out::println); where sturdents comes from public class UniversityGroup { public List students; thanks

Hi there, I don't know, perhaps is because my english is a bit rusty but to me the way this task is worded leads to confusion. These are the conditions of the taks: ************************************************************************* StringHelper class In the StringHelper class, implement two s

Could someone explain it to me ?

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

My program work fine. Where is the problem?

I can't solve this... I keep getting " tree.clone can't be overridden"

We have to create a private getAllUsers method in the MainModel class (Step 6). But then we have to also declare this method in the Model interface (Step 8). How can that be? The interface methods cannot be private, and a method implemented from an interface cannot have a different access modifier.

Hey a questions about this challenge: Why there are 2 classes in this challenge? class Solution & class Cat .. I thought there can/should be only 1 class per file or? package com.codegym.task.task05.task0504; /* The Three "Muscateers" */ public class Solution { public static void mai

The code is working. It runs and generates the required answer. According to the example they provided they want the first day of the year to be counted, right? I tried a million different dates and my answer is correct every time. The answer is correct, the logic is correct and the math is correct.

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

Hi, I am not able to pass 3. condition any tips?

I tested with different cases, and my code seems working fine. My sort logic is: name in alphabetical ascending order, if same, then date in descending order, if same, then profit (last-open) in descending order. I can't figure out where is the problem.

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I am a novice programmer so I could be making a big mistake and I just do not see it but this code works for all input scenarios that I have tried and yet the verification still marks it as wrong, any hints would be greatly appreciated.

Seemed to fulfill all the requirements ,but still not passing. Any eagle eyes ?

Hi there, I added the sout on line 11 so that when I run it I can see the results of the increases by the passed-in value I would appreciate it if anyone could tell me why is this wrong? thanks

the cube method takes a and turns it into a= a*a*a so why cant the ninthDegree method take a and return it as a = (cube a) * (cube a) * (cube a) ? instead, it's some random statement that is not even explained how or more importantly why it works.

Why I'm not able to pass the vaildation? This is the comment from my mentor but I'm not able to see my mistake. Be sure that the toDecimal(String) method returns 0 if it receives an empty string or null as input. Some help, please?

Hi there, Is posible that there's a bug in the proposed algorithm for converting an octal number to decimal?

I'm having trouble completing the third requirement to double the number. I've tried (n * 2) and (n + n) both which double the number when I input a number. But i'm still missing something and failing the task. Any advice? Thank you in advance.

If we are talking about "users" folder (see attached pic), then what does the term means: "all of its subdirectories" ? A) admin, staff, student; or B) admin, staff, student, jon, steve ?

public static void main (String [] args) { int z = x+y; (there is an underline at the bottom of x and y) int x = 22; int y = 25; System.out.printIn("The sum of x+y = "+z); }

https://codegym.cc/groups/posts/113-introducing-the-externalizable-interface I don't understand why the the following is said in the lecture (link above) : "Third, when you use inheritance, all descendant classes that inherit some externalizable class must also have default constructors." I assum

Hi there, In don't understand what is actually required in this task. May I have some more detailed information about what it's to be done?