Android Question Check is null

[Emme Developer]

Hi all!
I have a strange issue.. why this code got me an error?

dim ReloadNotif as Notifica = null
lbTime.Text = Utils.IIF(ReloadNotif <> Null,ReloadNotif.custom.Get("time"),"120")

public Sub IIF(c As Boolean, TrueRes As Object, FalseRes As Object) As Object
    If c Then
        Return TrueRes
     Else
          Return FalseRes
    End If
End Sub

Spoiler: Error

*** Service (starter) Create ***
Found 22 strings.
loc it
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (addwifinotification) Create, isFirst = true **
** Activity (addwifinotification) Resume **
addwifinotification_loadactivity (B4A line: 99)
lbTime.Text = Utils.IIF(ReloadNotif.custom <> Nul
java.lang.NullPointerException: Attempt to read from field 'anywheresoftware.b4a.objects.collections.Map b4a.example.utils$_notifica.custom' on a null object reference
    at b4a.example.addwifinotification._loadactivity(addwifinotification.java:788)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
    at anywheresoftware.b4a.keywords.Common$11.run(Common.java:1151)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6682)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)

If i use this works..

If (ReloadNotif = Null) Then lbTime.Text = "120" Else lbTime.Text = ReloadNotif.custom.Get("time")
    lbTime.Text = lbTime.Text & " "&Utils.loc.Localize("Utils4")

 

[OliverA]

Because when you use your IIF method, all 3 parameters have to be passed to the method. Your second parameter is ReloadNotif.custom.Get("time") and since ReloadNotif is null, the access to the custom field fails (as the error message shows). In the second example, the ReloadNotif.custom.Get("time") is not accessed until after the check for null is done. Hope it makes sense.