EXPLAIN ;
> A like as, constructor in Java is similar to a method that is invoked when an object of the class is created.
> Unlike Java methods, a constructor has the same name as that of the class and does not have any return type.
> For example, class Bike { Bike() { // constructor body } } Here, Bike () is a constructor.
TYPES ;
> Now is the correct time to discuss the types of the constructor, so primarily there are two types of constructors in java,
> No-argument constructor
> Parameterized Constructor
NO-ARGUMENT CONSTRUCTOR ;
> A constructor that has no parameter is known as the default constructor.
> If we don’t define a constructor in a class.
> then the compiler creates a default constructor(with no arguments) for the class.
> And if we write a constructor with arguments or no arguments then the compiler does not create a default constructor.
PARAMETERIZED ;
> constructor that has parameters is known as parameterized constructor.
> If we want to initialize fields of the class with our own values, then use a parameterized constructor.
PROGRAM ;
classEmp
/ / constructor with one argument
{
Emp(String name)
{
System.out.println("Constructor with one "+
"argument - String : "+ name);
}
// constructor with two arguments
Emp(String name, intage)
{
System.out.println("Constructor with two arguments : "+
" String and Integer : "+ name + " "+ age);
}
// Constructor with one argument but with different
Emp(log id)
{
System.out.println("Constructor with one argument : "+
"Log : “+ id);
}
}
class company
{
public static void main(String[] args)
{
// Creating the objects of the class named 'Emp’
// by passing different arguments
Emp staff = newEmp("Sp”);
// Inside the constructor with two arguments
// the constructor with one argument of
Emp staff 2 = neEmp("sp”, 22);
Emo staff 3 = newEmp(1234567);
}
}
SEE JAVA 