程序代码：

import java.util.*;
class Name implements Comparable
{  public String firstName,lastName;
   public Name(String firstName,String lastName)
   {  this.firstName=firstName;
      this.lastName=lastName;
    }
    public int compareTo(Name o)
    {  int lastCmp=(o.lastName);
       return(lastCmp!=0?lastCmp:(o.firstName));
     }
    public String toString()
    {  return firstName+" "+lastName;
     }
}
public class NameSort
{   public static void main(String args[])
     {  Name nameArray[]=
         {   new Name("John","Lennon"),
             new Name("Karl","Marx"),
             new Name("Groucho","Marx"),
             new Name("Oscar","Grouch")};
         Arrays.sort(nameArray);
         for(int i=0;i<nameArray.length;i++)
               System.out.println(nameArray[i].toString());
      }
}