How to use wait and notify in Java without IllegalMonitorStateException?

Question

I have 2 matrices and I need to multiply them and then print the results of each cell. As soon as one cell is ready I need to print it, but for example I need to print the [

Answer 1

You can only call notify on objects where you own their monitor. So you need something like

synchronized(threadObject)
{
   threadObject.notify();
}