Insert Character in a String ?

I am trying to insert the following character " / " to my string. It is printing out as 19990923. I want the output to print 1999/09/23

I need some help with this problem. Thanks for any assistance.

String[] s2= eRecord.split(",");

String stkSymbol1 = s2[0];

String stkDate1= s2[1];

// int a = stkDate1.length() ;

// buffer.insert(3," / ");

// System.out.printf("\n%s\n\n" buffer.toString());

System.out.println ("The Date for the last record is : "+ stkDate1); //

[521 byte] By [NevisAce1a] at [2007-11-27 1:52:51]