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What do you understand about constructor?

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hannah momo answered on July 1, 2022 Popularity 9/10 Helpfulness 1/10

answer What do you understand about constructor?

related why do we need constructor

related • What is a constructor? Explain the use of constructor with the help of a program.

What do you understand about constructor?

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What do you understand about constructor?

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Contributed on Jul 01 2022

hannah momo

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why do we need constructor

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Constructors are an essential part of object-oriented programming as they help 
initialize the newly created objects. The primary purpose of a constructor is to
set the initial state of an object and prepare it for use. It is a special type 
of method that is automatically called when an object of a class is created. 
The constructor can be used to set default values for attributes or to take 
initial values as parameters and assign them to the corresponding attributes.
Constructors are useful because they ensure that an object is always created 
in a valid state. Without a constructor, an object may be created with 
uninitialized attributes, leading to unexpected behavior or runtime errors. 
Constructors also allow for better code organization and maintenance. 
By encapsulating the initialization process in a constructor, it becomes easier 
to modify the initialization logic later on without affecting the rest of the 
code.
In summary, constructors are necessary because they provide a standard way to 
initialize objects, ensure that objects are created in a valid state, and improve code organization and maintenance.

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Contributed on May 10 2023

Adventurous Alligator

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• What is a constructor? Explain the use of constructor with the help of a program.

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class Person {
    private String name;
    private int age;

    // Parameterized constructor
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    // Default constructor
    public Person() {
        // Default values
        this.name = "John Doe";
        this.age = 30;
    }

    public void displayDetails() {
        System.out.println("Name: " + name);
        System.out.println("Age: " + age);
    }
}

public class ConstructorExample {
    public static void main(String[] args) {
        // Creating objects using constructors
        Person person1 = new Person("Alice", 25);
        Person person2 = new Person();

        // Display details of the created objects
        System.out.println("Person 1 details:");
        person1.displayDetails();

        System.out.println("\nPerson 2 details:");
        person2.displayDetails();
    }
}

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Contributed on Nov 05 2023

Samikshya Swayamjyoti Sahu

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What do you understand about constructor?

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What do you understand about constructor?

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why do we need constructor

• What is a constructor? Explain the use of constructor with the help of a program.

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