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What is the purpose of a default constructor in Java?

The purpose of the default constructor is to assign the default value to the objects. The java compiler creates a default constructor implicitly if there is no constructor in the class.

  1. class Student3{
  2. int id;
  3. String name;
  5. void display(){System.out.println(id+” “+name);}
  7. public static void main(String args[]){
  8. Student3 s1=new Student3();
  9. Student3 s2=new Student3();
  10. s1.display();
  11. s2.display();
  12. }
  13. }

Output:

0 null
0 null

Explanation: In the above class, you are not creating any constructor, so compiler provides you a default constructor. Here 0 and null values are provided by default constructor.

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