Producer-Consumer problem - 1 item

package Thread;

class Consumer extends Thread {
    private Good gObj;

    Consumer(Good g) {
        gObj = g;
    }

    public void run() {
        synchronized (gObj) {
            try {
                if(gObj.get().equals(""))
                {
                    System.out.println("Consumer waiting for good to be available");
                    gObj.wait();                                        
                }
                System.out.println("Got a good-->" + gObj.get());
            } catch (InterruptedException e) {

                e.printStackTrace();
            }
        }
    }
}

class Good {
    private String item = "";

    public void set(String str) {
        item = str;
    }

    public String get() {
        return item;
    }
}

public class Producer implements Runnable {
    private Good gObj;

    Producer(Good g) {
        gObj = g;
    }

    public void run() {
        synchronized (gObj)
        {
            if(gObj.get().equals(""))
            {
                System.out.println("Going to produce an item");
                gObj.set("hi");             
                gObj.notify();  
            }           
        }
    }

    public static void main(String[] args) {
        Good g = new Good();
        Producer p = new Producer(g);
        Thread producerThread = new Thread(p);  
        Consumer c = new Consumer(g);
        c.start();
        producerThread.start();
    }
}