I’m not sure if this is a math or a programming question, but i don’t know how i can transform the coordinates of a JPanel to the coordinates of a graph. If i have a JPanel with 800×1000 size and the graph has the sizes -2 to 2(x) and -2 to 2(y) and i am drawing something on ths graph(i
Tag: java
How to fill an array with a new row in Java?
So what I have so far is a randomized board containing numbers 1, 2 and 3. The board is 6 * 10. (So 6 Columns and 10 rows). The plan is when the user gives an input, a new row of randomized numbers should be added to the board. The thing is that the 2D array will be 6 *
Java Programmingtechnic to check files performant?
I’m searching for a pattern or programming technic in Java for my service. The Input of the service is an Array of Strings. These Strings represent a file and some information. The output of the service is a Map of the exact String and a Boolean. The Boolean represents that the information exists in the…
JUnit4 – Trying to make my constructor work with my unit tests
So as you will be able to see in the code, my class constructor asks the user for an input of the “initialValue” of their object. I then have a method “addToValue” which adds to that value. When trying to use JUnit4 to learn TDD it does not use the “initialValue” parameter …
How to convert String to UTC timezone?
I have a string like this, I have a utility which converts this string to UTC time This returns the result 2022-12-09T12:21:32Z It gives back the time difference of 4 hours. Shouldn’t it be 5 hours? Answer There is a time change in EST timezone on October 30th, try in September and you have only 4 hours…
How to show colour change when customised radio button is selected?
I am new to coding generally, and have been working on a quiz program on HTML and CSS (data is from PostgreSQL, framework SpringBoot on Eclipse. PHP and JQuery not included in syllabus). Here’s my problem: Now I have a list of answers where the user will have to select from. Was hoping to have the colou…
AndroidRuntime: FATAL EXCEPTION: main Caused by: java.lang.RuntimeException
https://github.com/ThalesCaruso/Lista-de-Mercado enter image description here enter image description here Watched a lot of youtube tutorials but didnt work Answer You’re using As per the Room Declaring Dependencies guide, you need to be using annotationProcessor for Java projects, not implementation:
ZipEntry is not writing file into directory
I am trying to write multiple files into a directory and a zip file. that directory and zip file are supposed to be contained in another zip. so my desired zip structure would look like this: When I read my files into a byte[] and write them into my directory testDirectory nothing is written into the director…
Creating a New Instance of a class via Reflection with Arguments from multiple Class Loaders
Hello I am trying to create a new instance of a class via reflection: In the example below the following applies: This is a method in a subclass of Arg1 Data is an object which stores class references which are associated with each other This code works when the provided arguments are from the same class load…
Mocking a Nested Object in Junit
I have a service I am mocking like this: } the service: I need to be able to mock the “CloseableHttpResponse response = httpclient.execute(request, clientContext)”, such that the “response” object is something I create ahead of time. I am hoping some mocking when/then constructs would …