1. class Ring {2.   final static int x2 = 7;3.   final static Integer x4 = 8;4.   public static void main(String[] args) {5.    Integer x1 = 5;6.    String s = "a";7.    if(x1 < 9) s += "b";8.    switch(x1) {9.     case 5: s += "c";10.     case x2: s += "d";11.     case x4: s += "e";12.    }13.    System.out.println(s);14.   }15. }