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Main.java

-class Main {
-  public static void main(String[] args) {
-    System.out.println("Hello world!");
-  }
+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();
+	}
+
 }
\ No newline at end of file