Test Correct Name Format With For Loop

I have to test user input for the correct format of a name in the format of firstName lastName (i.e. Bob Smith). These are my for loops to test each of these four exceptions: No blanks between names firstName and lastName, Non-alphabetic characters in names, Less than two characters in first name, Less than two characters in last name.

import java.util.*;
public class Driver {
private String name;
public static void main(String[] args) {
new Driver();

[Code] ......

How to search for more than two characters in the first and last name??