Java super kalit so‘zi

Java super kalit so‘zi

Java tilida super kalit so‘zi voris sinfning (subclass) ota sinfiga murojaat qilish uchun ishlatiladi.

super kalit so‘zining eng keng tarqalgan qo‘llanilishi — bir xil nomli metodlarga ega ota sinflar (superclass) va voris sinflar (subclass) o‘rtasidagi chalkashlikni bartaraf etish.

Undan ikki asosiy usulda foydalanish mumkin:

• Ota sinfdagi atribut va metodlarga murojaat qilish uchun
• Ota sinf konstruktorini chaqirish uchun

Ota sinf metodlariga murojaat qilish

Agar voris sinfda ota sinfdagi metod bilan bir xil nomli metod bo‘lsa, ota sinfdagi variantini chaqirish uchun super’dan foydalanishingiz mumkin:

class Animal {
  public void animalSound() {
    System.out.println("The animal makes a sound");
  }
}

class Dog extends Animal {
  public void animalSound() {
    super.animalSound(); // Call the parent method
    System.out.println("The dog says: bow wow");
  }
}

public class Main {
  public static void main(String[] args) {
    Dog myDog = new Dog();
    myDog.animalSound();
  }
}

Ota sinf atributlariga murojaat qilish

Agar ikkala sinfda bir xil nomli atribut bo‘lsa, ota sinf atributiga murojaat qilish uchun ham super’dan foydalanishingiz mumkin:

class Animal {
  String type = "Animal";
}

class Dog extends Animal {
  String type = "Dog";

  public void printType() {
    System.out.println(super.type); // Access parent attribute
  }
}

public class Main {
  public static void main(String[] args) {
    Dog myDog = new Dog();
    myDog.printType();
  }
}

Ota sinf konstruktorini chaqirish

Ota sinfning konstruktorini chaqirish uchun super()’dan foydalaning. Bu, ayniqsa, initsializatsiya kodidan qayta foydalanishda qulay.

class Animal {
  Animal() {
    System.out.println("Animal is created");
  }
}

class Dog extends Animal {
  Dog() {
    super(); // Call parent constructor
    System.out.println("Dog is created");
  }
}

public class Main {
  public static void main(String[] args) {
    Dog myDog = new Dog();
  }
}