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 HasStatic( ); 5 . hs1.x++; 6 . HasStatic hs2=new HasStatic( ); 7 . hs2.x++; 8 . hs1=new HasStatic( ); 9 . hs1.x++; 10 . HasStatic.x- -; 11 . System.out.println( “ x= ” +x); 12 . } 13 . }