Is a constructor in class any sort of variable before an instance is created?

Question

example

public class Program{

Program(){System.out.println("hello");} << Is this the constructor?

}
main...

Program pgm = new Program(); < or is the constructor created here when an instance of class is created?

Answer 1

The second one you wrote creates the constructor, it initializes the object pgm.

Answer 2

If I understand you correctly, the Program() you wrote defines a method in class Program. So maybe the term you are looking for is method

Answer 3

You welcome @David

Answer 4

thanks Ziv

Answer 5

thanks do u know what its called in class before its initialized is it some sort of variable?

Answer 6

simply put, a constructor is a non-static method with the same name as your class. in the class Program your constructor would be: Program(<param>), where <param> is optional and can be any type.

when you type Program Pym = new Program(); this is a method call to your constructor.

side note: method overloading does work here, meaning you can have multiple constructors (since they all have the same name), just change the <param> for each one. such as:
Program(int I){...}
Program(String message){...}
so on..