public class Car { private String brand; public Car(String brand) { this.brand=brand; } class Engine{ String model; public Engine(String model) { this.model=model; } public void ignite() { System.out.println("发动机"+this.model+"点火"); } } public void start() { System.out.println("启动"+this.brand); } public static void main(String[]args) { Car car=new Car("大众银行"); car.start(); //创建发动机类（内部类）对象，并为发动机型号赋值 Car.Engine engine=car.new Engine("EA211"); engine .ignite(); }

}