Reference to variables using method w/ string parameter?

I've done some programming before, but not too much in Java, so bear with me please.
Basically, what I'm trying to do is find a static method with a string parameter that can serve as a variable reference. Here's an example of what I mean.
Say that the method is "toVariableReference", with a string paramter. Then, to refer to a variable x1, I could refer to it as follows:
x1
OR
toVariableReference("x1")
See?
Now, if you don't see the point yet, the reason I'm trying to figure this out is because if I wanted to check if nine integer primitive data identifiers contain values greater than 500, instead of having 9 if statements, I could do the following:
for (x=1; x<10; x++)
if (toVariableReference("int"+x)>500)
<statements>
Since this theoretical method has a string parameter, one could concatenate an integer counter to it, as I have done above.
Now, the big question. Is there such a method that, when invoked, does what I have described? If so, what is it, and what java packages would I need to import for its usage?
Thank you for your time!
-Katsarephat

Yes, you can change array entries. You might want to take a look at the Java Tutorial:
http://java.sun.com/docs/books/tutorial/
The "Learning the Java Language" link has some information about arrays (and many other things).

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