BA345 L

Үр дүнг гарга

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• 0

• алдаатай

Үр дүнг гарга.

• 12

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• 321

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Класс удамшуулахад ямар түлхүүр үг ашигладаг вэ?

• super

• extends

• this

• extent

class A

{

int i;

void display()

{

System.out.println(i);

}

}

class B extends A

{

int j;

void display()

{

System.out.println(j);

}

}

class inheritance_demo

{

public static void main(String args[])

{

B obj = new B();

obj.i=1;

obj.j=2;

obj.display();

}

}

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• 1

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• 3

class A

{

int i;

}

class B extends A

{

int j;

void display()

{

super.i = j + 1;

System.out.println(j + " " + i);

}

}

class inheritance

{

public static void main(String args[])

{

B obj = new B();

obj.i=1;

obj.j=2;

obj.display();

}

}

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public class Vehicle {

public void move() {

System.out.println("The vehicle moves"); } }

public class Car extends Vehicle {

public void move() { System.out.println("The car moves"); } }

public class Main { public static void main(String[] args) {

Vehicle vehicle = new Car(); vehicle.move(); } }

• The vehicle moves

• The car moves

• The vehicle moves

  The car moves

class Parent {

String name = "parent";

String message() { return "from parent"; } }

class Child extends Parent {

String name = "child";

String message() { return "from child"; } }

public class Main { public static void main(String[] args) {

Parent p = new Child();

System.out.println(p.name + " " + p.message()); } }

• "parent from parent" 

• "child from child" 

• "parent from child" 

• "child from parent" 

Class зарладаг түлхүүр үг

• new

• define

• class