GameOfLife | For learning and education purpose | Learning library

I have encountered this problem and i couldn't find the solution. There is a 2D array with only zeros and ones in it (the size of the array doesnt really matter, i worked with 10x10). Zero means dead and 1 is alive. I double for looped this to check the elements sorroundings and when it sorrounded with other "cells" the code would work fine. But when its in the corner or one of the other edge of the array then it throws an ArrayIndexOutOfBoundsException. My question is how to write a code for this without handle all the possible situation?

I use Intelliji IDEA 2019.3 and I try to use cobertura-maven-plugin this way

So I'm creating the game of life in java but I'm having trouble with the animation part. I have the cells drawn on a JComponent which is displaying as it should but I have a start button that should start the whole animation process but nothing happens when I click the start button.

From the tutorials I have watched and research I've done I know you must have an ActionListener that listens on the button and an actionPerformed() method that holds the code to start the animation. this being said my code is as follows:

I am currently attempting to write John Conway's game of life in java using Swing. I have however run into problems regarding JPanel cells in GridLayout. Here is the code that is problematic

I'm creating the game of life in java and need to draw the cells randomly on the screen, so I am extending the JComponent class to draw the rectangles then I want to add the JComponent to my JFrame. I previously tried drawing the rectangles straight onto the JFrame but came to find out that is not how things are to be done so now I created a nested private class and done the drawing of the rectangle on that and added it to my JFrame. Everything's compiling correctly but nothing is shown on my JFrame. My code is as follows:

I just want to make a map with some Vertical LinearLayout that in each of that have a Horizontal LinearLayout and in each of this layout wanna inflate a view that is like below code :

each_cell.xml

I am trying to create John Conway's game of life for my own self development project. The general problem I am having is getting the animation to visualise on the GUI, now the error message I am getting is the following:

I am having issues writing data from my game to a file and loading it so I can resume the game from the state that it was in when I saved it's data. I have gotten thus far but it consistently throws a null pointer exception. When I click on saveGame I use a buffered writer to write the string value of all my data. I then load the file by reading from the file, I am not sure how to actually display the read data but before I try to get that far I need to fix the null pointer exception throw from happening. I have tried writing to the file which I'm pretty confident in the path being correct so I'm not sure as to why it's doing this.

Code

I wanted to try coding Wator/GameOfLife. I have these two methods that fill the gameField and draw it.