Find the middle initial in spite of any number of excess blank spaces.

// loop past all the spaces to find the first letter
   int i=0;
   while(i<str.length()&&str.charAt(i)==' ')i++;   // i is the location of the first letter of first name
   int j=i;
   //look past all the non-space characters to find the next blank space //j is the first blank space after first name
   int k=j;
   // loop past all the spaces to find the next letter // k is the first letter of middle name
   int m=k;
   //look past all the non-space characters to find the next blank space// m is the first blank space after second name
   int n=m;
   // loop past all the spaces to find the next letter // n is the location of the first letter of last name
//if you ended up past the end of the string, there is no last name.

//if there is a last name, then there is a middle initial, otherwise, there isn't
   if(n<s.length())return(s.substring(k,k+1));
   else return("none");