How is the null check statement below throwing a Nullpointer Exception? Is the request perhaps null? I'm confused Somebody help.  if(!getTGTid(request).equalsIgnoreCase(null) ||  !getTGTid(request).equalsIgnoreCase("")) {   Method  private String getTGTid(HttpServletRequest request) { return request.getParameter("tgtId");  }
129
What are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them?  What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely?
65747
I'm running a REST API which is returning the below:  "id" : "fdgsdgsdsdgsdg",    "pageevents" : [ {        "name" : "test",        "number" : "0123442",        "homepage" : "www.test.com"     } ],     "goals" : [ {        "name" : "test",        "number" : "0123442",        "homepage" : "www.test.com"     } ] } ]   Im using the below code to de-serialize it, so i can display it as a pageblocktable on a visualforce page however im getting the error :      System.JSONException: Illegal value for primitive   public List&lt;maMoments&gt; getMomentsActivity() {     Id contactId;     if (contactId == null) {         contactId = '0030O00001sqXJr';     }      String contactIdString = String.valueOf(contactId);     String jsonResponse = this.AutomationDetailsMoments(contactIdString);     system.debug(jsonResponse);     List&lt;maMoments&gt; mAutomation = (List&lt;maMoments&gt;) JSON.deserialize(jsonResponse, List&lt;maMoments&gt;.class);     system.debug(mAutomation);     for(maMoments emailStructure : mAutomation){      }      return mAutomation; }  public string AutomationDetailsMoments(String contactId) {     contactId = '0030O00001sqXJr';     Http h = new Http();     HttpRequest req = new HttpRequest();     req.setEndpoint('https://virtserver.swaggerhub.com/mickjdavies/Example/1.0.0/interestingmoments');     req.setMethod('POST');     req.setBody(contactId);      // Send the request, and return a response     HttpResponse res = h.send(req);     system.debug(res.getBody());     return res.getBody(); }  private class maMoments {     public String contactId;     public String id;     public List&lt;String&gt; goals;     public String name;     public String homepage;     public String phone; }
55455
Is it safe to assume that NULL always translates to false in C?  void *somePtr = NULL;  if (!somePtr) {   /* This will always be executed? */ }   Or should an explicit check against the value of NULL be made?
44999
I am trying to write a test class for the Apex Class with try - catch block and this is my first time coding test classes. The Apex Class is like below which has trycatch   public class updateCaseRecord {          @AuraEnabled     public static void updateCheck(String caseId){         String msg = '';         try         {         List&lt;Case&gt; records = [select id,Status from Case WHERE Id = :caseId];         for (Case record : records)         {             record.Status = 'Closed';         }         update records;          }         catch(DmlException e)              {                for (Integer i = 0; i &lt; e.getNumDml(); i++) {                     msg =+ e.getDmlMessage(i) +  '\n' ;                     System.debug('getDmlFieldNames=' + e.getDmlFieldNames(i));                    System.debug('getDmlMessage=' + e.getDmlMessage(i));                   }                 throw new AuraHandledException(msg);             }             catch(Exception e)             {             throw new AuraHandledException(e.getMessage());             }             finally { }           }}   And I wrote my test class like   @IsTest public class updateCaseRecordTest { @IsTest static void testIsUpdateCheck() {      ID parentRecType = '012U0000000PqA9IAK';     ID csRecType     = '012U0000000QGv4IAG';       Account pa = new Account(Name='Test Parent Account', recordTypeId=parentRecType);     insert pa;      Account testAccount = new Account(Name='test', Industry='Biotech',Territory__c='EUR',BillingCity='Test',BillingCountry='Germany',ParentId=pa.id);     insert testAccount;       Contact c = new Contact(LastName='Test',LeadSource='Customer Service',AccountId=testAccount.Id);     insert c;      Case newCase1 = new Case();     newCase1.Subject = 'testStatusClosed';     newCase1.Status = 'New';     newCase1.Category__c = 'Inquiry';     newCase1.Sub_Category__c = 'Other';     newCase1.AccountId = testAccount.Id;     newCase1.ContactId = c.id;     newCase1.recordTypeId=csRecType;     insert newCase1;       Test.startTest(); try     {     updateCaseRecord.updateCheck(newCase1.Id);     List&lt;Case&gt; lCases = [SELECT Id,Status,OwnerId FROM Case WHERE Id =: newCase1.Id];     System.assertEquals('Closed', lCases[0].Status);      System.assertEquals(UserInfo.getUserId(), lCases[0].OwnerId);     }      catch(DMLException e) {         System.assertEquals(e.getMessage(), e.getMessage());     }      Test.stopTest();    }}   I thought I captured the try catch but when I run the test class it has only 57% code coverage and shows like below    Following one of the answers here
14635
private string? typeOfContract {   get { return (string?)ViewState["typeOfContract"]; }   set { ViewState["typeOfContract"] = value; } }   Later in the code I use it like this:  typeOfContract = Request.QueryString["type"];   I am getting the following error at the declaration of typeOfContract line stating:     The type 'string' must be a non-nullable value type in order to use   it as parameter 'T' in the generic type or method   'System.Nullable&lt;T>'   Any ideas? Basically, I want to make sure that "type" exists in the QueryString before performing an action.
99846
I need to determine if a Class object representing an interface extends another interface, ie:   package a.b.c.d;     public Interface IMyInterface extends a.b.d.c.ISomeOtherInterface{     }   according to  Class.getSuperClass() will return null for an Interface.       If this Class represents either the   Object class, an interface, a   primitive type, or void, then null is   returned.   Therefore the following won't work.  Class interface = Class.ForName("a.b.c.d.IMyInterface") Class extendedInterface = interface.getSuperClass(); if(extendedInterface.getName().equals("a.b.d.c.ISomeOtherInterface")){     //do whatever here }   any ideas?
40938
After I posted this question, I found a similar post that seemed to answer it: . I'll leave this in place for now, as I am not sure how to mark my own question as a duplicate  In attempting to debug a SOQL query error, I encountered a strange behavior with Database.query and bind variables. Specifically, when I run this code:  String userQuery = 'SELECT Id FROM User'; if (true) {     List&lt;String&gt; firstNames = new List&lt;String&gt;{'James','Joe'};     userQuery += ' WHERE FirstName IN :firstNames'; } Database.query(userQuery);   the Database.query statement executes with no errors, despite the fact that the variable firstNames does not exist in its context. However, when I add an else clause:  String userQuery = 'SELECT Id FROM User'; if (true) {     List&lt;String&gt; firstNames = new List&lt;String&gt;{'James','Joe'};     userQuery += ' WHERE FirstName IN :firstNames'; } else {     List&lt;String&gt; firstNames; } Database.query(userQuery);   I receive a null object reference exception. It seems like Salesforce is checking to see if the variable is only declared once beforehand and, if so, uses its value in the context it was declared. This seems strange to me, so I was wondering if anybody here has any insight into what is going on under the hood.
27078
I noticed for a while now the following syntax in some of our code:  if( NULL == var){    //... }   or  if( 0 == var){   //... }   and similar things.  Can someone please explain why did the person who wrote this choose this notation instead of the common var == 0 way)?  Is it a matter of style, or does it somehow affect performance?
100647
I have a shape layer with an attribute containing NULL values to which I would like to apply a filter for values different from NULL.    Using the available gui for such query construction, one would intuitively try  "obj_art" != NULL     Which means 'give me all the features with attribute "obj_art" different from NULL' (these count definitely more than 0). Testing this query delivers a strange result from my point of view:    So what I've learned so far is that I can achieve this by using  "obj_art" IS NOT NULL   The question is, what is the difference between != NULL and IS NOT NULL?
55087
i am building a app which takes input from user and then search to a remote database(MySql).And then display the retrieved data on VisualForce page.One important note that my app will be distributable.  here is my controller class  public with sharing class Search  {    public String strTag {get;set;}   public String strlocation {get;set;}    public PageReference find() {              return null;   } }   Thanks in advance.  Updated  public with sharing class Search  {   public String strTag {get;set;} public String strlocation {get;set;}   public PageReference find() {             HttpRequest req = new HttpRequest();   HttpResponse res = new HttpResponse();   Http http = new Http();    req.setEndpoint('https://localhost/salesforce/');   req.setMethod('POST');     req.setCompressed(false);   req.setBody('key1=value1&amp;key2=value2');   req.setHeader('Content-Type', 'application/x-www-form-urlencoded');      try {     res = http.send(req);   } catch(System.CalloutException e) {     system.debug('Callout error: '+ e);   }   system.debug(res.getBody());      return null;  } }   I am getting below error now      error message System.CalloutException: Unauthorized endpoint, please check Setup->Security->Remote site settings. endpoint = localhost/salesforce
116653
I have this:  If String.IsNullOrEmpty(editTransactionRow.pay_id.ToString()) = False Then     stTransactionPaymentID = editTransactionRow.pay_id 'Check for null value End If   Now, when editTransactionRow.pay_id is Null Visual Basic throws an exception. Is there something wrong with this code?
57540
I'm trying to update an account list and I need to get the Ids when the update fails.  I use the getId() method but for accounts which fail I get null.  It's an update so my account already has an Id.  Is it normal ? If it is, how can I get the Ids list of non-updated accounts ?  Here is my code :  List&lt;Account&gt; accountsList = [select Id from Account];  for(Account a : accountsList) {     a.Name = 'Test', }  List&lt;Database.SaveResult&gt; res = Database.update(accountsList, false);  for (Database.SaveResult s : res) {     if (!s.isSuccess()) {         system.debug(s.getId()); // I get null here      }  }
33203
What exception should I throw if I encounter an illegal state - for instance, an initialization method that should only be called once being called a second time?  I don't really see any built-in exception that makes sense.  This seems like something that should be in the framework - am I not poking in the right spot?
119160
This Trigger is on lead (Before Insert, Before Update) and it errors (System.NullPointerException: Attempt to de-reference a null object). I'm getting this error when i'm posting "Web to Lead". However i do have the right ORG iD and Record type id included on the xml file:   &lt;input type=hidden name="oid" value="xxxxxxxxxxxxx"&gt; &lt;input type=hidden name="recordType" id="recordType" value="zzzzzzzzzzzzzzzzzz"&gt;    trigger IAAILeadTrigger on Lead (before insert, before update){ //BEGIN: S-444340 T-561808 - Process only IAA Remarketing Recordtype data     Map&lt;ID,Schema.RecordTypeInfo&gt; rt_Map = Lead.sObjectType.getDescribe().getRecordTypeInfosById();      //Looks up the branches based on the Lead PostalCode     if(trigger.isBefore){          for(Lead ld : trigger.new){                      if (rt_map.get(ld.recordTypeID).getName().containsIgnoreCase('IAA Remarketing') )                if( trigger.isInsert ||                    (trigger.isUpdate &amp;&amp; ld.Branch__c == null) ||                   (trigger.isUpdate &amp;&amp; ld.PostalCode != trigger.oldMap.get(ld.id).PostalCode)               ){                   leads.add(ld);               }           }           }                 //Only check the leads that are in the lead list and NOT the full trigger.new list         if(!leads.isEmpty()){             LeadController.GetLeadBranches(leads);           }     }  }
8444
How can I use JUnit4 idiomatically to test that some code throws an exception?  While I can certainly do something like this:  @Test public void testFooThrowsIndexOutOfBoundsException() {   boolean thrown = false;    try {     foo.doStuff();   } catch (IndexOutOfBoundsException e) {     thrown = true;   }    assertTrue(thrown); }   I recall that there is an annotation or an Assert.xyz or something that is far less kludgy and far more in-the-spirit of JUnit for these sorts of situations.
52560
I am getting "Error System.QueryException: List has no rows for assignment to SObject".   Line 1: Account ac = [select id from Account where name='testaccount' limit 1] Line 2: if(ac != null) {           //do something         }   I got the above error in line 2 if there is no record.   Any help?
118759
Question  I'm writing some code that needs to be able to get the values of the parameters from the method that called into the class. I know how to get all the way to the ParameterInfo[] array, but I don't know how to then get the values. Is this even possible?  If it is, I think it has something to do with using the MethodBody property from the MethodInfo object, which allows you to inspect the IL stream, including properties, but I don't know how to do it, and I haven't found applicable code on Google.  Code  // Finds calling method from class that called into this one public class SomeClass {     public static void FindMethod()     {         for (int i = 1; i &lt; frameCount; i++)         {             var frame = new StackFrame(i);             var methodInfo = frame.GetMethod();             if (methodInfo.DeclaringType != this.GetType())             {                 string methodName = frame.GetMethod().Name;                 var paramInfos = methodInfo.GetParameters();                  // Now what?? How do I get the values from the paramInfos                  break;             }             else if (i == frameCount - 1)             {                 throw new TransportException("Couldn't find method name");             }         }     } }