J250419/chapter01-javaSE/J20250718/demo01_innerClass/Car.java

package J20250718.demo01_innerClass;

/**
 * @author WanJl
 * @version 1.0
 * @title Car
 * @description 卡车
 * @create 2025/7/18
 */
public class Car {
    String color;

    public class Engine{
        String size;
    }
}