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. }