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.
- class Student3{
- int id;
- String name;
- void display(){System.out.println(id+” “+name);}
- public static void main(String args[]){
- Student3 s1=new Student3();
- Student3 s2=new Student3();
- s1.display();
- s2.display();
- }
- }
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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