This document demonstrates constructor overloading in Java by defining two constructors for a Student class - a default constructor that sets default values for roll number and name, and a parameterized constructor that accepts and assigns values for roll number and name. The main method creates two Student objects, one using each constructor, and calls the displayStudent method to output the roll number and name for each student.

1. //Ques. 9 WAP on constructor overloading.
class Student
{
privateintrollNumber;
private String name;
public Student()
{
System.out.println("n Inside Default Constructor");
rollNumber=0;
name="Unknown";
}
public Student(introllNumber,String name)
{
System.out.println("n Inside Overloaded Constructor");
this.rollNumber = rollNumber;
this.name=name;
}
public void displayStudent()
{
System.out.println(" Name = "+name);
System.out.println(" Roll No. = "+rollNumber);

2. }
}
classConstructorOverLoad
{
public static void main(String arg[])
{
Student s1 = new Student(7448264,"Ultimate Virus");
s1.displayStudent();
Student s2 = new Student();
s2.displayStudent();
}
}

3. OUTPUT:-