This MapUtil class tests various usages of the Map class. 
params 1..5 are strings. You will create a tree map with each string as a key and
its corresponding value will be the number of leters in that string. param 6 is an
integer. You will return the number of strings in the map length equal to param 6.

Complete the following file:

Use the following file:

import java.util.Set;
import java.util.HashSet;

   This SetUtil class tests various usages of the Set class. 
   param1 is a string. You will create a set with all vowels, a,e,i,o,u. Then you will return 
   string with all vowels removed. Vowels may be lower or upper case.
public class SetUtil

 public static String check(String str)
      // TODO Create a stack of Character elements, caled stack,  with all possible vowels

	  return processSet(stack, str);

 public static String processSet(Set<Character> set, String str)
     StringBuffer sb = new StringBuffer();

	 for (int i = 0; i < str.length(); i++)
        // TODO: if a string char is in the set do nothing, otherwise append it
        // to the stringbuffer, sb
     return sb.toString();