@@ -0,0 +1,317 @@
+public class Count11 %7B%0A  public static void main (String... args) %7B%0A    // Result:3.%0A    System.out.println(new Count11().count11 (%2211xx11xxxx11%22));%0A  %7D%0A  %0A  public int count11 (String str) %7B%0A    return str.length()%3C2?0:(str.substring (0,2).equals (%2211%22))?1+count11(str.substring(2)):count11(str.substring(1));%0A  %7D%0A%7D%0A

Create Count11.java