JAVA

Java No-Arg Constructors

private Constructor() {
   // body of the constructor
}

Java private no-arg constructor

class Main {

  int i;

  // constructor with no parameter
  private Main() {
    i = 15;
    System.out.println("Constructor called 
");
  }

  public static void main(String[] args) {

    // calling the constructor without any parameter
    Main obj = new Main();
    System.out.println("Value of i: " + obj.i);
  }
}

Java public no-arg constructor

class Tutorialweb {
  String website;

  // public constructor
  public Tutorialweb() {
    website = "Softhunt.net";
  }
}

class Main {
  public static void main(String[] args) {

    // object is created in another class
    Tutorialweb obj = new Tutorialweb();
    System.out.println("Tutorial website name = " + obj.website);
  }
}

Java private no-arg constructor

class Main {

  int i;

  // constructor with no parameter
  private Main() {
    i = 5;
    System.out.println("Constructor is called");
  }

  public static void main(String[] args) {

    // calling the constructor without any parameter
    Main obj = new Main();
    System.out.println("Value of i: " + obj.i);
  }
}

Java public no-arg constructors

class Company {
  String name;

  // public constructor
  public Company() {
    name = "Programiz";
  }
}

class Main {
  public static void main(String[] args) {

    // object is created in another class
    Company obj = new Company();
    System.out.println("Company name = " + obj.name);
  }
}