Java Learning-an example of polymorphic use

1  Public classTestanimal {2      Public Static voidMain (string[] args) {3Testanimal T =Newtestanimal ();4T.func (NewAnimal ());5T.func (NewDog ());6         7T.func (NewCat ());8         9     }Ten      Public voidFunc (Animal a) {//Animal a = new Dog (); One a.eat (); A a.jump (); -          -         if(AinstanceofDog) { theDog d =(Dog) A; - D.wang (); -         } -         if(AinstanceofCat) { +Cat C =(Cat) A; - c.catchmouse (); +         } A     } at //Public void func (Dog a) { - //a.eat (); - //a.jump (); - //    } - } - classanimal{ in String name; -     intAge ; to      +      Public voideat () { -System.out.println ("Eating"); the     } *      Public voidJump () { $System.out.println ("Jump");Panax Notoginseng     } - } the classDogextendsanimal{ +      Public voideat () { ASystem.out.println ("Dog Feeding"); the     } +      Public voidJump () { -System.out.println ("Cornered"); $     } $      -      Public voidWang () { -System.out.println ("Barking"); the     } - }Wuyi  the classCatextendsanimal{ -      Public voideat () { WuSystem.out.println ("Cat Eats fish"); -     } About      Public voidJump () { $System.out.println ("Cat jumping"); -     } -      Public voidCatchmouse () { -System.out.println ("The Cat catches the mouse"); A     } +}

Java Learning-an example of polymorphic use