Planting a tree by creating a class

This code produces an error because our program needs a main() method.

Define this method inside the curly braces of the Tree class. How do we do this part?

https://www.codecademy.com/courses/learn-java/projects/planting-a-tree

Every Java program needs a main method to run.
To define it, inside your tree class, type out your main method:

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