java--属性的继承



package com.qianfeng.day08.demo4;

 

public class GFather {

      publicint age;

 

}

 

 

 

package com.qianfeng.day08.demo4;

 

public class Father extends GFather{

      privateString name = "father";

}

 

 

 

package com.qianfeng.day08.demo4;

 

// son老爸是father son 继承了Father

 

/*[修饰符] class  子类名字 extends 父类名

{

}

*/

//java支持单继承，也就是说一个类只有唯一一个[直接]父类

public class Son extends Father{

      publicstatic void main(String[] args) {

             Son son = new Son();

             System.out.println(son.age);  //GFather 属性，间接继承而来

      }

}

 

 

 

package com.qianfeng.day08.demo4;

 

public class Test {

      publicstatic void main(String[] args) {

             Son son = new Son();

             //System.out.println(son.name);

      }

}