🟣 OOP  ·  Lesson 18

Constructors

What is a Constructor?

A constructor is a special method that runs automatically when an object is created. It sets up the object's initial values. It has the same name as the class and no return type.

Parameterized Constructor

class Student {
    String name;
    int marks;
    Student(String n, int m) {   // constructor
        name = n;
        marks = m;
    }
}

Student s = new Student("Riya", 95);
System.out.println(s.name + " " + s.marks);
Riya 95

Summary

  • A constructor runs on object creation; same name as class, no return type.
  • Parameterized constructors set initial values directly.

Constructor क्या है?

Constructor एक special method है जो object बनते ही अपने आप चलता है। यह object की initial values set करता है। इसका नाम class जैसा होता है और कोई return type नहीं।

Parameterized Constructor

class Student {
    String name;
    int marks;
    Student(String n, int m) {   // constructor
        name = n;
        marks = m;
    }
}

Student s = new Student("Riya", 95);
System.out.println(s.name + " " + s.marks);
Riya 95

सारांश

  • Constructor object बनने पर चलता है; नाम class जैसा, कोई return type नहीं।
  • Parameterized constructors initial values सीधे set करते हैं।
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