check if a string is more than 30 chars

How do i do a check to see if the user input string is more than 30 chars without the inclusion of spaces.

Eg 1: abcdefghijklm nopqrstuvwxyz 12345 (this string contains 31 chars not including sapces and will be disallowed)

Eg2: 1234567890 1234567890 123456789 (this string contains 29 chars not including sapces and therefore it is allowed.)

Thanks... pls help asap...
Codes will be very helpful

Step 1: Use a StringTokenizer to split the string apart on the spaces.

Step 2: Use a while loop to the put the string back together without spaces.

Step 3: Use length() to test the new string.

I know you can do this. I have faith .