Swapping Values Using Reflection [duplicate]

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I have looked up reflections in java, but still don't quite understand them. I need to "swap" values of two local parameters using a reflection. Here is what I have. I know it doesn't swap the values which is why I need to use the reflection. How do I do this?

public class SwapBla {
static int x = 1;
static int y = 2;
 public static void swap2(int x, int y)
 {
   int temp = x;
   x = y;
   y = temp;
 }
}