name.java

public class Name implements Comparable {
    private String first, last;
    
    public Name (String firstName, String lastName) {
        first   = firstName;
        last    = lastName;
    }
    
    public int compareTo(Object obj) {
        Name other = (Name) obj;
        if(other.toString().equals(this.toString()))
            return 0;
        else if (other.last == this.last) 
            return this.first.compareTo(other.first);
        else
            return this.last.compareTo(other.last);
    }
    
    public String toString() {
        return first+" "+last;
    }
}