public static void main(String[] args) { int tankCount = 0; MyContainer<AbstractTank> container1 = new MyContainer<AbstractTank>(); container1.addItem(new FlyingTank(++tankCount, Color.BLACK, 100)); container1.addItem(new SwimmingTank(++tankCount, Color.RED, 100)); MyContainer<String> container2 = new MyContainer<String>(); container2.addItem("Hello"); container2.addItem("Sam hello"); }