public static void main(String args[]) {

        // Create a hash map
        HashMap hm = new HashMap();
        // Put elements to the map
        hm.put("Zara", new Double(3434.34));
        hm.put("Mahnaz", new Double(123.22));
        hm.put("Ayan", new Double(1378.00));
        hm.put("Daisy", new Double(99.22));
        hm.put("Qadir", new Double(-19.08));

        // Get a set of the entries
        Set set = hm.entrySet();
        // Get an iterator
        Iterator i = set.iterator();
        // Display elements
        while(i.hasNext()) {
            Map.Entry me = (Map.Entry)i.next();
            System.out.print(me.getKey() + ": ");
            System.out.println(me.getValue());
        }
        System.out.println();
        // Deposit 1000 into Zara's account
        double balance = ((Double)hm.get("Zara")).doubleValue();
        hm.put("Zara", new Double(balance + 1000));
        System.out.println("Zara's new balance: " +
                hm.get("Zara"));
    }