Refresh applet sqlj NullPointerException URGENT!

Question

I have the following sqlj code in an applet to retrive data from an oracle database. After this the code goes onto draw the data in the applet using AWT (that code isn't shown here). My trouble is that when I get to the following line Connection con = Oracle.connect("jdbc:oracle:thin:@ebalpha:1525:ORCL", "flowmanager", "xxxxx").getConnection(); I get a Null Pointer exception only after refreshing the page using F5.
So to overcap I get a NullPointerException only when I refresh the applet. It runs perfectly the first time. The applet need to be refreshed because the data in the table get updated and the applet need to be refreshed to show the data changes.
public void getFlowSpaceData() throws SQLException {
// MyIter iter;
String strUserName = getParameter("paramUserName");
String strFlowName = new String();
Connection con = Oracle.connect("jdbc:oracle:thin:@ebalpha:1525:ORCL", "flowmanager", "xxxxx").getConnection();
strQuery = "select FLOWNAME FROM FLOWMANAGER.TMP_FLOWNAMES WHERE USERNAME ='" + strUserName +"'";
PreparedStatement pstmt0 = con.prepareStatement(strQuery);
ResultSet rs0 = pstmt0.executeQuery();
while (rs0.next()) {
strFlowName = rs0.getString(1);
rs0.close();
pstmt0.close();
strQuery = "select FLOWNAME, USERNAME, PANELROW, PANELCOL, RELATEROW, RELATECOL, OBJTYPE, BASECODE, INDUSTRYID, PANELNUM, BUSINESSPROCESSID FROM flows WHERE flowname ='" + strFlowName + "' AND username ='" + strUserName +"' ORDER BY PANELNUM";
PreparedStatement pstmt1 = con.prepareStatement(strQuery);
ResultSet rs1 = pstmt1.executeQuery();
int r = 0;
int c = 0;
while (rs1.next()) {
intObjType[r][c]= rs1.getInt(7);
strID[r][c] = rs1.getString(11);
//strIDQuery = strIDQuery + 'or ID =' + strinID
intRowRelation[r][c] = rs1.getInt(5);
intColRelation[r][c] = rs1.getInt(6);
c++;
if(c > 4) {
r++;
c = 0;
rs1.close();
pstmt1.close();
PreparedStatement pstmt2 = con.prepareStatement(strQuery);
ResultSet rs2 = pstmt2.executeQuery();
r = 0;
c = 0;
int i = 0;
int intSTRLENGTH = 0;
while(i < 24){
strQuery = "select name, descr, role from BUSINESSPROCESS WHERE ID = '" + strID[r][c] + "'";
pstmt2 = con.prepareStatement(strQuery);
rs2 = pstmt2.executeQuery();
rs2.next();
intSTRLENGTH = rs2.getString(1).length();
if (intSTRLENGTH > 17){
strLabel1[r][c] = rs2.getString(1).substring(0,17);
strLabel2[r][c] = rs2.getString(1).substring(18,intSTRLENGTH);
}else {
strLabel1[r][c] = rs2.getString(1).substring(0,intSTRLENGTH);
strLabel2[r][c] = " ";
intSTRLENGTH = rs2.getString(2).length();
if (intSTRLENGTH > 17){
strDescr1[r][c] = rs2.getString(2).substring(0, 17);
strDescr2[r][c] = rs2.getString(2).substring(18,intSTRLENGTH);
}else{
strDescr1[r][c] = rs2.getString(1).substring(0,intSTRLENGTH);
strDescr2[r][c] = " ";
c++;
i++;
if(c > 4) {
r++;
c = 0;
rs2.close();
pstmt2.close();
con.close();
con = null;
Thanks for you Assistance! It's greatly appreciated!
Chris Wallace

Answer 1

After further research I notice that if I Clear classload cache after every load before I refresh the applet it works fine. I can't have the user brining up the the consule windows and pressing x to clear classloader. Just thought I would give this futher information to help limit what the problem could be.