Call when not null

Hi,
I have a system which works fine but one part is not working. The user has the option to enter text into a comments box and when the user clicks submit an email should be sent if the comments box is not null, but at the minute an email is sent whether it is null or not.
This is where the email method is triggered:
if (receiptBean.getComments() != "") //also tried != null
 try
 commentsEmail(receiptBean, fsSecurity, ht, receivedDespatches);
 catch (DLRAppException e)
 e.printStackTrace();
 log.debugPrint(e.toString(), 0);
 redirectURL = errorJSP;
 }and this is called (even if box is null, which it shouldn't do):
 public void commentsEmail (DataEntryReceiptBean receipt, SecurityBean userDetails, Hashtable ht, ArrayList receivedCases)
 throws dlr.common.DLRAppException {
 SENDTO_EMAIL_ADDRESS = cf.readConfigParam("email.EmailAddress_Receipt");
 String rtn = " ";
 StringBuffer message = new StringBuffer();
 message.append(rtn + "" + ht.get("36068") + "" + rtn);
 message.append(rtn + "" + ht.get("36080") + ":" + "" + "Order Number Here" + rtn);
 message.append(rtn + "" + ht.get("36071") + ":" + "" + " " + userDetails.getUserName() + rtn);
 message.append("" + ht.get("36070") + ":" + "" + " " + receipt.getDespatchNoteID() + rtn);
 message.append("" + ht.get("36079") + ":" + "" + " " + receipt.getDespatchDate() + rtn);
 message.append("" + ht.get("36072") + ":" + "" + " " + receipt.getReceiptID() + rtn);
 message.append("" + ht.get("36073") + ":" + "" + " " + DateFormatUtility.getFormattedDateTime(receipt.getRecievedDate()) + rtn);
 message.append(rtn + "" + ht.get("36077") + ":" + "" + rtn);
 for (int i = 0; i < receivedCases.size(); i++) {
 PackingNoteBean packingNote = (PackingNoteBean) receivedCases.get(i);
 message.append(rtn + "" + ht.get("36074") + ":" + "" + " " + packingNote.getCaseNumber() + rtn);
 message.append("" + ht.get("36075") + ":" + "" + " " + packingNote.getPartCodeDescription() + rtn);
 message.append("" + ht.get("36076") + ":" + "" + " " + packingNote.getCaseDescription() + rtn);
 message.append(rtn + "" + ht.get("36078") + ":" + "" + rtn);
 for (int i = 0; i < receivedCases.size(); i++) {
 PackingNoteBean packingNote = (PackingNoteBean) receivedCases.get(i);
 message.append(rtn + "" + ht.get("36074") + ":" + "" + " " + packingNote.getCaseNumber() + rtn);
 message.append("" + ht.get("36075") + ":" + "" + " " + packingNote.getPartCodeDescription() + rtn);
 message.append("" + ht.get("36076") + ":" + "" + " " + packingNote.getCaseDescription() + rtn);
 message.append(rtn + "" + ht.get("36069") + "" + rtn);
 message.append(rtn + receipt.getComments() + rtn);
 // send email.
 if (sendEmail(new String[] { SENDTO_EMAIL_ADDRESS},
 null,
 "Receipt Comments",
 message.toString(),
 true,ht)) {
 log.debugPrint("Email successfully sent", 3);
 else {
 log.debugPrint(
 "FATAL ERROR: Failed to send a comments email", 0);
 }Thanks to anyone who can help.

You have to compare Strings using their equals() method:String comment= receiptBean.getComments();
if( !(comment == null || comment.equals("")) ) // non-empty commentkind regards,
Jos

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