📘 Lesson · Lesson 28

this and super

this refers to the current object. super refers to the parent class — used to call parent methods or constructors.

this Example

class Student {
    String name;
    Student(String name) {
        this.name = name;   // this distinguishes field from parameter
    }
}

super Example

class Animal {
    void sound() { System.out.println("Some sound"); }
}
class Dog extends Animal {
    void sound() {
        super.sound();   // calls parent method
        System.out.println("Bark");
    }
}

Some sound Bark

Summary

this = current object (resolves name conflicts).
super = parent class (call parent method/constructor).

this और super

this current object को refer करता है। super parent class को — parent methods या constructors call करने को।

this Example

class Student {
    String name;
    Student(String name) {
        this.name = name;   // field को parameter से अलग करता है
    }
}

super Example

class Animal {
    void sound() { System.out.println("Some sound"); }
}
class Dog extends Animal {
    void sound() {
        super.sound();   // parent method call करता है
        System.out.println("Bark");
    }
}

Some sound Bark

सारांश

this = current object (name conflicts हल करता है)।
super = parent class (parent method/constructor call)।

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