Consider the following markup. In this example, there is a class called MyClass. Within the class, there is a constructor also called MyClass, because the name of the constructor must match the name of the class. Also, a constructor cannot be void (eg. public void MyClass). In this example, the constructor updates the "name" variable to have a value of John Doe. Generally speaking, constructors are used to update a variable to contain a value.

package my.pkg;

public class MyClass {

  String name;
	
  public MyClass() {
    name = "John Doe";
  }
}

As we can see, a constructor exists inside of a bean or class.