Null Point Exception Error

[Former Member]

Hi All

I have to add an input field which will accept email Id from users. This field has to be kept mandatory. I have kept a check on the value entered. If the user does not enter any value, an error message should be displayed. Below is the code that I have written. Whenever, the user keeps this field blank and submits the form, null point exception error is displayed.

Please help how to overcome this problem

email = wdContext.currentContextElement().getEmail_Id();

try{

if (wdContext.currentContextElement().getEmail_Id().equals("") )

{

IWDMessageManager msg = wdThis.wdGetAPI().getComponent().getMessageManager();

msg.reportMessage(IMessageTender_ResignationComp.PERSONAL_EMAIL_ID,new Object[]{"Please enter correct Email Id"},true);

}

else

{

.......

....

}

[Former Member · Accepted solution]

Hi Umang,

Instead of

if (wdContext.currentContextElement().getEmail_Id().equals("") )

try

if (wdContext.currentContextElement().getEmail_Id() == null || wdContext.currentContextElement().getEmail_Id().equals("") )

Regards,

Gopal

[Former Member · Accepted solution]

hi,

Actually as soon as it finds null, it throws the null pointer exception.....for this you can try the following code:

  String val=wdContext.currentContextElement().getEmail_Id().

      int length=(val==null)?0:val.length();

      if(length==0)

      {

            msg1.raiseMessage(IMessageComp_Message.EMPID,new Object[]{""},true); 

      }

regards,

pinki

[Former Member]

Hi

Check your Code....

And Debug you app then find where is the error.

[Former Member]

hi Umang,

try this,

String E_Mail = wdContext.currentContextElement().getMail();

if(E_Mail.equals(""))
{
   wdComponentAPI.getMessageManager.reportException("Please enter valid EMail Id",true);
}

else
{
   //Process
}

[Former Member]

Hi

Put the code as follows:

String email = wdContext.currentContextElement().getEmail_Id();
if( email.equals( "") || ( email == null) || ( email.length == 0))
{
   wdComponentAPI.getMessageManager().reportWarning( "The email field can not be empty!");
}

// checking in three conditions: one for empty second for null value and the last by length of the input email string.

Regards

Vinod V

[former_member341974]

hi,

u can initialize the email id attribute to blank in init method

then u can try the following code

if(wdContext.currentContextElement().getAtribute().equalsIgnoreCase(""))

{

print error mesage

}

[Former Member]

Hello Umang ,

If the input field is blank, the the chances are node wdContext.currentContextElement()

will be Null. You you cannot get Email id using get Email id, if the node object is null.

Try like this..

if( wdContext.currentContextElement() != null && wdContext.currentContextElement().getEmail_Id().size() == 0){

IWDMessageManager msg = wdThis.wdGetAPI().getComponent().getMessageManager();

msg.reportMessage(IMessageTender_ResignationComp.PERSONAL_EMAIL_ID,new Object[]{"Please enter correct Email Id"},true);

}

Hope this helps.

[Former Member]

Hi,

Change the following code to

email = wdContext.currentContextElement().getEmail_Id(); 
try{


if (wdContext.currentContextElement().getEmail_Id().equals("") )
{
IWDMessageManager msg = wdThis.wdGetAPI().getComponent().getMessageManager();
msg.reportMessage(IMessageTender_ResignationComp.PERSONAL_EMAIL_ID,new Object[]{"Please enter correct Email Id"},true);

}

if (wdContext.currentContextElement() != null)
{
    email = wdContext.currentContextElement().getEmail_Id(); 

if ( email.equals("") )
{
IWDMessageManager msg = wdThis.wdGetAPI().getComponent().getMessageManager();
msg.reportMessage(IMessageTender_ResignationComp.PERSONAL_EMAIL_ID,new Object[]{"Please enter correct Email Id"},true);

}
}

Regards

Ayyapparaj

[Former Member]

Hi Umang,

if (wdContext.currentContextElement().getEmail_Id().equals("") )

instead of this line try the below code.

if(email == null || email.trim().length() == 0){

IWDMessageManager msg = wdThis.wdGetAPI().getComponent().getMessageManager();

msg.reportMessage(IMessageTender_ResignationComp.PERSONAL_EMAIL_ID,new Object[]{"Please enter correct Email Id"},true);

}

Hope it resolves your problem.

Thanks n Regards,

Jhansi Mirayala