Simple thread program to understand synchronized, wait and notify

I'm looking at other examples here and in other sites and I'm not understanding what I'm doing wrong. I'm trying to do a program that one thread sets the value of an object to the values 1 to 10, but I want to wait for it to change the value until other thread reads it, so I can print them and have a list from 1 to 10.

My readThread run method just loops from 1 to 10 calling the following method:

private synchronized int receive() {      try {          wait();          int value = this.mainThread.getValor();          notify();          return value;      } catch (InterruptedException e) {          e.printStackTrace();      }      return -1;    }  

My writeThread run method just loops from 1 to 10 calling the following method:

private synchronized void send(int n) {      try {          this.mainThread.setValor(n);          notify();          wait();      } catch (InterruptedException e) {          e.printStackTrace();      }  }  

The main method is the following:

public static void main(String[] args) {      MainThread mt = new MainThread();      ReadThread rt = new ReadThread(mt);      WriteThread wt = new WriteThread(mt);            wt.start();      rt.start();    }  

The class MainThead has the property "valor" defined with its getter and setter

Thank you for your help

https://stackoverflow.com/questions/67011783/simple-thread-program-to-understand-synchronized-wait-and-notify April 09, 2021 at 04:57AM