how to sort alphabetically

i'm trying to sort a number of arrays into alphabetical order going by surname. The code looks like this

int i;

int j;

String temp;

String temp2;

String temp3;

String temp4;

// Sort the student arrays

for (i=0; i<MAX_RECORDS; i++)

{

for (j=i+1; j><MAX_RECORDS; j++)

{

if (lastName><lastName[j])

{//switch first name ordertemp = lastName;

lastName = lastName[j];

lastName[j] = temp;

//switch last name order

temp2 = firstName;

firstName = firstName[j];

firstName[j] = temp2;

//switch phone no. order

temp3 = telNumber;

telNumber = telNumber[j];

telNumber[j] = temp3;

//switch email order

temp4 = emailAddress;

emailAddress = emailAddress[j];

emailAddress[j] = temp4;

When i compile it i come up with the followin error:

operator >< cannot be applied to java.lang.String,java.lang.String

Can ne pls help its starting to do my head in

[1103 byte] By [orangecubea] at [2007-11-27 3:59:54]