What do you understand by copy constructor in Java?

DWQA QuestionsCategory: JavaWhat do you understand by copy constructor in Java?
Editor Staff asked 9 months ago

What do you understand by copy constructor in Java?

1 Answers
Editor Staff answered 9 months ago

There is no copy constructor in java. However, we can copy the values from one object to another like copy constructor in C++.
There are many ways to copy the values of one object into another in java. They are:
By constructor
By assigning the values of one object into another
By clone() method of Object class
In this example, we are going to copy the values of one object into another using java constructor.
//Java program to initialize the values from one object to another
class Student6{
int id;
String name;
//constructor to initialize integer and string
Student6(int i,String n){
id = i;
name = n;
}
//constructor to initialize another object
Student6(Student6 s){
id = s.id;
name =s.name;
}
void display(){System.out.println(id+” “+name);}

public static void main(String args[]){
Student6 s1 = new Student6(111,”Karan”);
Student6 s2 = new Student6(s1);
s1.display();
s2.display();
}
}
Test it Now
Output:
111 Karan
111 Karan