Shadow an instance variable by declaring a local variable of the same name directly or as part of an argument : Method Variable « Java Source And Data Type « SCJP

1. SCJP
2. Java Source And Data Type
3. Method Variable

class MainClass {
    static int size = 7;
    static void changeIt(int size) {
      size = size + 200;
      System.out.println("size in changeIt is " + size);
    }
    public static void main (String [] args) {
      MainClass f = new MainClass();
      System.out.println("size = " + size);
      changeIt(size);
      System.out.println("size after changeIt is " + size);
    }
  }