Using Same Variable Name In Two Classes

Regarding the code examples in Head First Java, this is from Chapter 5, regarding the beginning creation of the dot com game. There are two classes in quesiton

the first is the SimpleDotComTester class:
public class SimpleDotComTester {
public static void main(String[] args)
{
SimpleDotCom dot = new SimpleDotCom();
int[] locations = {2, 3, 4};
dot.setLocationCells(locations);
String userGuess = "2";
String result = dot.checkYourself(userGuess);
}
}

and the second one is the code for the checkYourself () method in the SimpleDotCom class

public class SimpleDotCom {
int[] locationCells;
int numOfHits = 0;

public void setLocationCells(int[] locs)

[code]....

Now I noticed that both classes use a variable called result; the program runs fine, but assume from the example that you can use the same variable name two different classes;