הערות על הבוחן 1. הבוחן כולל את כל החומר שנלמד בקורס עד ( כולל ) מבוא לעצמים

1. () . 2. - " " .3. . . :. . . . . .4. . , . 3. . .

. RobDog

:

. .. tootoo.. .

.

( ) (inheritance).

RobDog Dog.

public class RobDog extends Dog {} RobDog.java .

.Dog RobDog Dog. .

public class RobDog_driver1 { public static void main(String[] args) { RobDog canis = new RobDog(); RobDog canis1; canis1 = change_name(canis,"Tushtush"); canis.voice(); canis1.voice(); System.out.println(canis == canis1); } public static RobDog change_name(RobDog to_change, String new_name) { to_change.set_name(new_name); return to_change; }}

The dog called Tushtush: HAAUThe dog called Tushtush: HAAUtrue

, .

RobDog public void set_name_to_peng() { name = peng;}

Dog name - set_name .public void set_name_to_peng() { set_name(peng);}

public RobDog(String name, int mood) { super(name,mood);}public RobDog(String name){ super(name); }

public RobDog(){ super();}

public RobDog(String name, int mood) { super(name,mood);}public RobDog(String name){ super(name); }public RobDog(){ super();}

super() Dog.

this() super() .

RobDog Dog. , .

. RobDog .

voice . (overriding).public static final String WHISTLE = TOOTOO;

voice(int) Dog RobDog

Dog voice . public void voice(int n_sounds, String happy_sound,String sad_sound)

voice (int) Dog

public void voice(int n_sounds) { voice(n_sounds,BARK,HOWL);} RobDog.public void voice(int n_sounds) { voice(n_sounds,WHISTLE,HOWL);} voice() Dog

voice RobDogpublic void voice(int n, int m) { voice(n*m);}

. toString() .public String toString() { return "The robot dog called "+get_name(); }

. . Dog public void set_eats(String food) { eats = food;}

RobDog :public RobDog(String name, int mood) { super(name,mood); set_eats(battery );}

public RobDog(String name){ super(name); set_eats(battery ); }

public RobDog(){ super(); set_eats(battery );}

super - RobDogpublic void pretend_to_be_a_dog(int n) { super.voice(n);}

Public class RobDog_driver { public static void main(String[] args) { RobDog rob = new RobDog();rob.voice(2,2); rob.eat(meat);rob.voice(2,3); rob.eat(battery); rob.voice(2,4);rob.pretend_to_be_a_dog(3); } }

The robot dog called dog_number0: TOOTOO TOOTOO TOOTOO TOOTOOThe robot dog called dog_number0: OOOOOO OOOOOO OOOOOO OOOOOO OOOOOO OOOOOOThe robot dog called dog_number0: TOOTOO TOOTOO TOOTOO TOOTOO TOOTOO TOOTOO TOOTOO TOOTOOThe robot dog called dog_number0: HAAU HAAU HAAUThe robot dog called dog_number0: TOOTOO TOOTOO TOOTOO TOOTOOThe robot dog called dog_number0: OOOOOO OOOOOO OOOOOO OOOOOO OOOOOO OOOOOOThe robot dog called dog_number0: TOOTOO TOOTOO TOOTOO TOOTOO TOOTOO TOOTOO TOOTOO TOOTOOThe robot dog called dog_number0: HAAU HAAU HAAU

Cat.

Cat Dog. , Cat set_pack .( )

(abstraction) , : - .

Mammal Dog.

Dog Public class Dog extends Mammal Cat Public class Cat extends Mammal

?

Organism Animal Plant Archeon MicrobeReptileMammal BirdFishCatDogInsectRobDogChicken

Java () . Object