What is the output(static instance)? : Questions « Modifiers « SCJP

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public class A {
  static int x;

  public static void main(String[] args) {
    A that1 = new A();
    A that2 = new A();
    that1.x = 5;
    that2.x = 1000;
    x = -1;
    System.out.println(x);
  }
}