Main.java

public class Main {

    private Object lock = new Object();

    public void doWait(){
        synchronized(lock){
            try{
                System.out.println("Start waiting");
                lock.wait();
                System.out.println("End waiting");
            } catch(InterruptedException e){
                e.printStackTrace();
            }
        }
    }

    public void methodBeforeEndWaiting() {
        synchronized (lock) {
            System.out.println("Method before 'End Waiting' will be printed");

            try {
                Thread.currentThread().sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public void doNotify(){
        synchronized(lock){
            System.out.println("Start notifying");
            Thread thread = new Thread(new Runnable() {
                @Override
                public void run() {
                    methodBeforeEndWaiting();
                }
            });
            thread.start();

            try {
                Thread.currentThread().sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            lock.notify();
            System.out.println("End notifying");

        }
    }

    public static void main(String[] args) throws InterruptedException {

        Main main = new Main();

        Thread t1 = new Thread(new Runnable() {
            @Override
            public void run() {
                main.doWait();
            }
        });

        Thread t2 = new Thread(new Runnable() {
            @Override
            public void run() {
                main.doNotify();
            }
        });


        t1.start();
        t2.start();

        t1.join();
        t2.join();

    }


}