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

package J20250718.demo01_innerClass;

/**
 * @author WanJl
 * @version 1.0
 * @title Van
 * @description
 * @create 2025/7/18
 */
public class Van {
    String color;
    //创建内部类的对象
    private Engine engine=new Engine();

    private class Engine{
        String size;
        public void engineMethod(){
            System.out.println("内部类的方法.....");
        }
    }
    //外部类方法
    public void getEngineMethod(){
        //调用内部类的方法
        engine.engineMethod();
    }

    public void setEngineSize(String size){
        engine.size=size;
    }

    public String getEngineSize(){
        return engine.size;
    }
}