Can't check for nulls in a conditional?

Hey everyone. Trying my hand at a text based game but I'm encountering many problems:
I have this method in one class that (as you can see) has a conditional that checks to see if 'check' is null, this throws a null pointer exception whenever it is called.
private void placeChars()
 String check = currentItem.getItemString();
 if(check.equals(null) && currentRoom.getShortDescription().equals("in the cafeteria"))
 josh.getSentence(0);
 }Here is the method that it is calling from:
public String getItemString()
 String returnString = null;
 if(haveItems != 0 ){
 returnString = "Items:";
 Set<String> keys = items.keySet();
 for(String item : keys) {
 returnString += " " + item;
 return returnString;
 }I'm not sure what I am doing wrong here :/ and yes I know the code is extremely ugly :)

if check is null, you can't invoke any methods on it, including equals.
To check for null:
if (check == null)

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Hi,
which obiee version r u using?
My Blog ref:
http://obieeelegant.blogspot.com/2011/06/replacing-null-as-0-in-obiee.html
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also see the bug reference
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I have 3 Page Validations which all fire on "When Button Pressed" = "Submit".
 
Number 1 is of type "Item specified is NOT NULL" for "P199_BUSINESS_UNIT1".
 
Number 2 is of type "Item specified is NOT NULL" for "P199_BUSINESS_UNIT2".
 
Number 3 is of type "Function Returning Boolean" and has the following code:
 
IF :P199_BUSINESS_UNIT1 IS NULL AND
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ELSE
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END IF ; 
When P199_BUSINESS_UNIT1 is NULL and P199_BUSINESS_UNIT2 is NOT NULL, I get the Error from Validation 1. Perfect.
 
When P199_BUSINESS_UNIT1 is NOT NULL and P199_BUSINESS_UNIT2 is NULL, I get the Error from Validation 2. Perfect.
 
When P199_BUSINESS_UNIT1 is NOT NULL and P199_BUSINESS_UNIT2 is NOT NULL, I don't get an Error Message. Perfect.
 
When P199_BUSINESS_UNIT1 is NULL and P199_BUSINESS_UNIT2 is NULL, I get Error Message 1 & 2, but nothing from 3.
 
If I change the code to:
 
IF :P199_BUSINESS_UNIT1 = '01' AND
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ELSE
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and change both values to '01', I get the appropriate Error Message.
 
What is going on? Is there some reason I can't check for NULL in a Function Returning Boolean?

Scott,
 
Instead of adding the Validations, I changed my code from:
 
IF :P199_BUSINESS_UNIT1 IS NULL AND
 :P199_BUSINESS_UNIT2 IS NULL THEN
 RETURN FALSE ;
ELSE
 RETURN TRUE ;
END IF ;
 to the following and got the desired results:
 
IF REPLACE(:P199_BUSINESS_UNIT1,'%null' || '%',NULL) IS NULL AND
 REPLACE(:P199_BUSINESS_UNIT2,'%null' || '%',NULL) IS NULL THEN
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ELSE
 RETURN TRUE ;
END IF ; 
Note that I changed the word REPLACE to upper case and the second occurrence of the word NULL to upper case to accentuate the fact that the '%null' is case sensitive, using "%NULL' does not work, it has to be "%null' in lower case.
 
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Hello all,
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A null check might not be you best option. If your requirement is you must have both the date and time component supplied in order to populate EventDate, then I would use a Script Functoid that takes data and time as parameters.
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Hi,
I have the below JScript:
/*Function to convert the US Date format to UK date format */
function parseDate(input) {
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return new Date(parts[2], parts[1]-1, parts[0]); // months are 0-based
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var sd = parseDate($("input[title='From']").val());
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if(sd > ed) {
alert("Please check From and Until Date");
$("input[value$='Save']").attr('disabled', true); //hide save button
else
$("input[value$='Save']").attr('disabled', false); //show save button
The above works fine for checking sd > ed but I can't seem to check for null's, I have attempted the below which doesn't work:
/*Function to convert the US Date format to UK date format */
function parseDate(input) {
var parts = input.split('/');
// new Date(year, month [, date [, hours[, minutes[, seconds[, ms]]]]])
return new Date(parts[2], parts[1]-1, parts[0]); // months are 0-based
/*Function to check if end date is before the start date */
function checkDates(){
var sd = parseDate($("input[title='From']").val());
var ed = parseDate($("input[title='Until']").val());
if( (sd > ed) || (sd == null) || (ed == Null) ) {
alert("Please check From and Until Date");
$("input[value$='Save']").attr('disabled', true); //hide save button
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Any help appreciated.

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looks like vcRow.setAttribute("Sal", "null") works

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Hello all,
How does APEX check for null values in Text Fields on the forms? This might sound trivial but I have a problem with a PL/SQL Validation that I have written.
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All that I need is to validate if P108_PRIVATE_IP is entered when a P108_CLUSTER_ID is selected. i.e it is mandatory to enter Private IP when a cluster is seelcted and following is my Pl/SQL code
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Thanks for replying man :)
Ok I will be more clear.
Here is a snippet of one of the xsd's that I am using.
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Hi
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try
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}Edited by: nb123 on Feb 3, 2008 11:23 PM

From your post I see you are using a 3rd party package to access the Excel SpreadSheets, you will have to look in your API for you 3rd party package and see if there is a method that will identify a blank row, if there is and it does not work, then you have to take that problem up with them. I know this is a pain, but it is the price we pay for 3rd party object use.
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Hello,
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Can't check for nulls in a conditional?

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