public class TestVehicle {
	public static void main(String[] args) {
		// 创建Vehicle数组，存放不同车辆
		Vehicle[] vehicles = new Vehicle[3];
		vehicles[0] = new Car();
		vehicles[1] = new Bike();
		vehicles[2] = new Truck();

		// 遍历数组，调用run()
		for (Vehicle v : vehicles) {
			v.run();
		}
	}
}