关于以下程序代码的说明正确的是( ) (1) class HasStatic{ (2) private static int x=100: (3) public static void main (String args[]{ (4) HasStatic hs1=new Has Static(); (5) hs1.x + +; (6) Has Static hs2=new HasStatic(); (7) hs2.x + +; (8) hs1=new HasStatic(); (9) hs1.x + +: (10) System.out.println('x='+ x); (11) } (12) }