https://www.lambda java constructorjavatpoint.com/java-constructor code example

Example 1: java constructor

class MyClass {
  public MyClass () {
    //constructor code
  }
}

Example 2: default constructor java

Default constructor is a constructor created by compiler; if user does not 
create a constructor in a class.
If user defines a constructor in a class then java compiler will not create 
default constructor.