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  • 编写一个Car类,具有final类型的属性品牌,具有功能drive; 定义其子类Aodi和Benchi,具有属性:价格、型号;具有功能:变速; 定义主类E,在其main方法中分别创建Aodi和Benchi的对象并测试对象的特 性。

    package b;
    
    public class Car {
          public final static Car pinpai=new Car();
          public static Car instance()
          {
            return pinpai;          
          }
          public void drive()
          {
              System.out.println("请安全驾驶!");
          }
    }
    package b;
    
    public class Aodi extends Car {
        private String price;
        private String xinghao;
        public String getPrice() {
            return price;
        }
        public void setPrice(String price) {
            this.price = price;
        }
        public String getXinghao() {
            return xinghao;
        }
        public void setXinghao(String xinghao) {
            this.xinghao = xinghao;
        }
        public void biansu(int a)
        {
            if(a>0)
            {
                System.out.println("加速");
            }
            else if(a<0)
            {
                System.out.println("减速");
            }
            else
            {
                System.out.println("匀速前进");
            }
            
        }
    
    }
    package b;
    
    public class Benchi extends Car {
        private String price;
        private String xinghao;
        public String getPrice() {
            return price;
        }
        public void setPrice(String price) {
            this.price = price;
        }
        public String getXinghao() {
            return xinghao;
        }
        public void setXinghao(String xinghao) {
            this.xinghao = xinghao;
        }
        public void biansu(int a)
        {
            if(a>0)
            {
                System.out.println("加速");
            }
            else if(a<0)
            {
                System.out.println("减速");
            }
            else
            {
                System.out.println("匀速前进");
            }
            
        }
    }
    package b;
    
    public class E {
    
        public static void main(String[] args) {
            Aodi aodi=new Aodi();
            aodi.setXinghao("奥迪Q7");
            aodi.setPrice("110万");
            System.out.println(aodi.getXinghao());
            System.out.println(aodi.getPrice());
            aodi.biansu(90);
            aodi.drive();
            Benchi benchi=new Benchi();
            benchi.setXinghao("迈巴赫");
            benchi.setPrice("200万");
            System.out.println(benchi.getXinghao());
            System.out.println(benchi.getPrice());
            benchi.biansu(-90);
            benchi.drive();
        }
    
    }

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  • 原文地址:https://www.cnblogs.com/wenwen123/p/5519882.html
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