nullpointerexception Questions
5
Solved
I am using ActiveMQ to send the message.
So when I sent a message, the message comes to receive message. On successful insertion, it is acknowledged.
But I have code after acknowledgement, which ...
Koeppel asked 14/9, 2012 at 12:14
3
Solved
I have a problem with Hibernate @EmbeddedId.
@Embeddable
public class EnrolRegEmbededId implements Serializable
{
@Column(name="ENROL_NO")
private String enrolNo;
@Column(name="REG_...
Boutte asked 31/8, 2018 at 7:43
13
The problem is as follows. I have a login activity (in Android Studio) which worked fine a few days before. I don't remember changing anything but when I run this one the previous time the app clos...
Vitrescent asked 28/5, 2015 at 13:40
4
Solved
I am having a error for my GUI. Trying to set title bar icon then be included in a Runnable JAR.
BufferedImage image = null;
try {
image = ImageIO.read(getClass().getClassLoader().getResource("re...
Julietjulieta asked 25/3, 2012 at 21:32
5
Solved
String str = "abc";
Comparing this string variable like the following.
if(str.equals("abc")) {}
In case str is null, it will cause a java.lang.NullPointerException to be thrown as obvious.
To...
Cacao asked 31/7, 2015 at 10:53
3
Solved
I keep trying to run my code, but when I run it I get the message
"Caused by: java.lang.NullPointerException: Cannot invoke "org.apache.commons.lang3.JavaVersion.atLeast(org.apache.common...
Cyrstalcyrus asked 3/12, 2020 at 0:45
7
I have a list of objects say car. I want to filter this list based on some parameter using Java 8. But if the parameter is null, it throws NullPointerException. How to filter out null values?
Curr...
Pyle asked 1/10, 2015 at 9:36
8
Solved
Groovy has a nice operator for safe dereferencing, which helps to avoid NullPointerExceptions:
variable?.method()
The method will only be called, if variable is not null.
Is there a way to do t...
Getaway asked 31/10, 2010 at 21:0
4
I have been trying to make a home page for my app which contains some modern dashboard along with navigation drawer.
Error found in my code:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com....
Deepfry asked 28/5, 2020 at 9:31
2
Solved
You create a script, it works for some time, then out of the blue it starts crashing with "You cannot call a method on a null-valued expression" or "The property 'property name' cannot be found on ...
Hoggish asked 10/7, 2015 at 7:43
14
Solved
Collectors.toMap throws a NullPointerException if one of the values is null. I don't understand this behaviour, maps can contain null pointers as value without any problems. Is there a good reason ...
Khelat asked 8/7, 2014 at 11:44
19
Solved
Before calling a function of an object, I need to check if the object is null, to avoid throwing a NullPointerException.
What is the best way to go about this? I've considered these methods.
Whic...
Murchison asked 25/6, 2013 at 16:8
26
I'm looking to make my code more readable as well as use tooling like IDE code inspection and/or static code analysis (FindBugs and Sonar) to avoid NullPointerExceptions. Many of the tools seem inc...
Atmolysis asked 10/2, 2011 at 22:5
9
Solved
I just downloaded the GlassFish 5.0 archive - Full Platform, unzipped it, I run it through the command line.
asadmin start-domain
problem:
Exception in thread "main" java.lang.NullPointerExce...
Tallinn asked 23/11, 2017 at 14:46
33
Android Studio 3.6
in app/build.gradle:
android {
viewBinding.enabled = true
Here my xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xml...
Virgate asked 25/10, 2019 at 8:18
9
Solved
I am trying to find my current location for an android project. When the application is loaded my current location is always null. I have set up the permissions in the manifest etc. When I find the...
Bionics asked 26/3, 2012 at 13:38
12
Solved
I've had instances of our Java code catch a NullPointerException, but when I try to log the StackTrace (which basically ends up calling Throwable.printStackTrace() ), all I get is:
java.lang.NullP...
Chickpea asked 9/3, 2010 at 18:23
5
Solved
I was using HashMap before like
public Map<SocketChannel, UserProfile> clients = new HashMap<SocketChannel, UserProfile>();
now I've switched to ConcurrentHashMap to avoid synchron...
Kalamazoo asked 16/9, 2010 at 0:57
13
Solved
I have noted that many Java 8 methods in Oracle JDK use Objects.requireNonNull(), which internally throws NullPointerException if the given object (argument) is null.
public static <T> T req...
Yoakum asked 11/8, 2017 at 10:26
2
Solved
i have an issue with hql queries which contain a null in the select, for example:
"select firstname, lastname, null from Employer"
The Nullpointer comes from:
Caused by: java.lang.NullPointerExce...
Flurry asked 3/3, 2020 at 13:54
2
I have an application that loads users installed applications and shows the list inside recyclerview (App name & icon).
This exception is thrown on android 8+ devices and also not on all device...
Kneeland asked 29/6, 2019 at 13:10
7
Solved
I have a problem about eclipse IDE, I can't open any file in my work space; if I try to open file, eclipse will alert the following error dialog
"An error has occurred. See error log for more det...
Stimulate asked 9/4, 2014 at 4:55
6
Solved
When using the Java 8 Optional class, there are two ways in which a value can be wrapped in an optional.
String foobar = <value or null>;
Optional.of(foobar); // May throw NullPointerExcepti...
Squally asked 29/7, 2015 at 9:30
11
I can see that @Nullable and @Nonnull annotations could be helpful in preventing NullPointerExceptions but they do not propagate very far.
The effectiveness of these annotations drop off complete...
Chatelain asked 20/11, 2012 at 23:48
2
Solved
I am trying to upgrade my SpringBoot Version from 2.1.1 to 2.7.x ( 2.7.5){Java Version - 17}, When I try to Run my application , I am getting the following error message
Caused by: java.lang.NullP...
Therine asked 15/3, 2023 at 14:17
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