Could anyone tell me whats the code means??

Question

Hi,
Could anyone tell me explanation of the code below:
player1.placeArmy(world.southAmerica().territory1());
all I know is that it is calling the method of an objects. I am not really sure about whats inside the bracket. How could such argument have the dot notation format?
Furthermore, could anyone have some advices about references to the multiple classes code example??

Answer 1

player1.placeArmy(world.southAmerica().territory1());player1 is a variable of some type. This type has presumably a method called placeArmy, which takes a parameter.
world is another variable of some type. This type has presumably a method called a method southAmerica(),
which returns a value of a type, which has a method territory1(), whose return value is provided as teh paramtere value to the method call mentioned above.
Another useful example as a food for thoughts could be:
Object o = new Integer(3);
System.out.println(o.toString());