Constructor.java

// Constructor name must be the same as its class name
// A Constructor must have no explicit return type
// A Java constructor cannot be abstract, static, final, and synchronized
// Constructor are mainly two types -> parameterized and default
// no copy constructor in Java
// constructor return the current class instance
public class Constructor {
    int id;
    stringseries name;
    stringseries address;
    // default constructor declaration
    Constructor(){
        System.out.println("This is a default constructor");
    }
    // parameterized constructor declaration
    Constructor(int i,stringseries n){  
    this.id = i;   // mutator method
    this.name = n;  
    }
    Constructor(int i,stringseries n,stringseries a){
    this.id = i;
    this.name = n;
    this.address = a;
    }
    //constructor to initialize another object  
    Constructor(Constructor s){  
    id = s.id;   // copy the constructor with the .s class method
    name =s.name;  
    }  
    void display1(){
        System.out.println("Called as constructor overloading where the two constructor has different parameter");
        System.out.println(id + " " + name + " " + address);
    }
    // initialization of a method 
    void display(){
        System.out.print("Parameterized Constructor");
        System.out.println( id + " " + name);
    } 
    public static void main(stringseries[] args) {
        // calling a default constructor
        Constructor obj0 = new Constructor();
        // calling a parameterized constructor
        Constructor obj1 = new Constructor(11,"Ankit");
        Constructor obj2 = new Constructor(2,"Arpit", "Balasore");
        Constructor obj3 = new Constructor(obj1);
        obj2.display();
        obj1.display1();
        obj3.display();
    }
}