Java Copy Constructor - The Coding Shala

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Java Copy Constructor

Java does not support copy constructor by default but we can create our own constructor to copy the values from one object to another.
Java Copy Constructor - The Coding Shala

Example of Copy Constructor in Java

The following is an example of java copy constructor:
public class Student{
    int id;
    String name;
    
    Student(){
        System.out.println("Default Constructor");
    }
    
    Student(int id, String name){
        this.id = id;
        this.name = name;
        System.out.println("Constructor with parameters");
    }
    
    //creating copy Constructor
    Student(Student s){
        this.id = s.id;
        this.name = s.name;
        System.out.println("Copy Constructor");
    }
    
    void Display(){
        System.out.println(id+" "+name);
    }
    
    public static void main(String[] args){
       Student s1 = new Student(1, "Akshay");
       s1.Display();
       //copying Constructor
       Student s2 = new Student(s1); //passing object as argument 
       s2.Display();
       //can also copy object with calling Constrctor 
       Student s3 = new Student();
       s3.id = s1.id;
       s3.name = s1.name;
       s3.Display();
    }
}

Output:
Constructor with parameters
1 Akshay
Copy Constructor
1 Akshay
Default Constructor
1 Akshay



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