Your DrowRanger method is calling itself infinitely. This is almost always the cause of a StackOverflowException.
This line:
return DrowRanger();
Calls the DrowRanger method, but since you’re inside the DrowRanger method it just keeps calling itself infinitely. I think you meant to return the local object:
return DrowRanger;
In general, it is a bad idea to give methods and objects the same name. Also, it is java convention always start method and variable/field names with a lowercase letter.
The output you’re seeing is how java prints objects that have not overridden the toString() method. See this post for an explanation of how the toString() method works.