ProducerConsumer

App.java

/*
 * This Java source file was generated by the Gradle 'init' task.
 */
public class App {
    
    public static void main(String[] args) {
        Shared shared = new Shared();
        new Produser(shared).start();
        new Consumer(shared).start();
    }
    
    
    static class Shared{
        
        private char c;
        private boolean writable = true;
        
        
        synchronized void setCharactoer(char c){
            
            while ( ! writable ) {
//                System.out.println("Now is writable c: " + c);
                try{
                    wait();
                }catch (Exception e) {
                    System.err.println(e.getMessage());
                }
            }
            this.c = c;
            writable = false;
//            System.out.println("set notify()" );
            notifyAll();
        }
        
        synchronized char readChar(){
            while (writable) {
                try{
                    wait();
                }catch (Exception e) {
                    System.err.println(e.getMessage());
                }
            }
            writable = true;
//            System.out.println("get notify()" );
            notify();
            return c;
            
        }
    }
    
    
    static class Produser extends Thread{

        private final Shared shared;
        
        public Produser(Shared shared) {
        
            this.shared = shared;
        }

        @Override
        public void run() {
            for(char ch = 'A'; ch  <= 'Z'; ch++){
                synchronized (shared) {
                    shared.setCharactoer(ch);
                    System.out.println(ch + " produced by producer");
                    }
                }
        }
    }
    
    static class Consumer extends Thread{
        
        private final Shared shared;
        
        public Consumer(Shared shared) {
            this.shared = shared;
        }
        

        @Override
        public void run() {
            char ch;
            do {
                synchronized (shared) {
                    ch = shared.readChar();
                    System.out.println(ch + " consumed by consumer");
                }
            } while (ch != 'Z');
            
        }
        
    }
}