nullpointerexception – One day all of my programs on processing written in java stoped working. How to solve these errors?

I am trying to run programs on processing I coded. They used to work fine, but one day they all stopped working and started showing the same error messages. the code below is one example. int cellSize = 10; float p0 = 50; float p1 = 25; float p2 = 0; float p3 = 0; … Read more