"Nine" abstract classes and abstract functions

1 classChinese extends absperson{2 3 Chinese () {4 super ();5System. out. println ("the Chinese constructor");6     }7     //above is the constructor of the abstract class8     voideat () {9System. out. println ("eat with chopsticks");Ten     } One     //override the abstract function inside the abstract class, so that Chinese can use the A}

1 Abstract classabsperson{2 Absperson () {3System. out. println ("the Absperson constructor");4     }5     //abstract class constructor, abstract class is also a constructor, in the generation of objects will be called6 String name;7     intAge ;8     9     voidintroduce () {TenSystem. out. println ("My name is"+ name +", my age is"+Age ); One     } A      -     Abstract voideat (); -}

1 class testabs{2      Public Static void Main (String args []) {3         New Chinese (); 4         ap.eat (); 5     }6 }

This test also uses an upward transformation, as well as a method that calls the sub-class that points

It's going to be a power cut, first.

"Nine" abstract classes and abstract functions