3回答

• 

  唯进

  2019-07-09 14:55:01

  已采纳

  可以用构造方法创建对象的时候往里面写数据，另外，父类的属性子类可以直接用 this. 就行了
  

  public Bus(Int people,String way){
  

  this.people = people;

  this.way = way;

  }

  //创建对象,和构造方法对应

  Vehicle obj1 = new Bus(40,"公交");

  obj1.Vway();

  5 0

  慕容0262...

  Vehicle obj1 = new Bus(40,"公交");和Vehicle obj1 = new Bus("公交"，40);输出是一样的吗？

  2019-08-28 21:47:53

  共 5 条回复 >

• 

  慕粉2235138145

  2020-04-29 10:06:13

  public class HelloWorld {    public int people;    public String way;    public void Abc(){            System.out.println("交通工具为："+way+"\n乘车人数："+people             );            }   public class bus extends HelloWorld{    public   bus(int people,String way){	   this.people=people;       this.way=way;      this.Abc();    }   }public class run extends HelloWorld{    public   run(int people,String way){	   this.people=people;       this.way=way;       this.Abc();    }   }	public static void main(String[] args) {        		 		HelloWorld num=new HelloWorld();		bus nums=num.new bus(40,"公交");        run numss=nums.new run(4,"跑步");	    	}}

  
  

  0 0
• 

  慕粉2235138145

  2020-04-29 10:05:48

  public class HelloWorld {

      public int people;

      public String way;

      public void Abc(){

         

       System.out.println("交通工具为："+way+"\n乘车人数："+people             );

          

      }

     public class bus extends HelloWorld{

      public   bus(int people,String way){

     this.people=people;

         this.way=way;

        this.Abc();

      }

  
  

     }

  public class run extends HelloWorld{

      public   run(int people,String way){

     this.people=people;

         this.way=way;

         this.Abc();

      }

  
  

     }

  
  

  
  

  
  

  
  

  public static void main(String[] args) {

          

   

  HelloWorld num=new HelloWorld();

  bus nums=num.new bus(40,"公交");

          run numss=nums.new run(4,"跑步");

      

  }

  }

  
  

  0 0