Nullpointer exception - JAVA Mockito

Nullpointer exception - JAVA Mockito

By : kvdv
Date : November 21 2020, 09:01 AM

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java - nullpointer exception

java - nullpointer exception

By : user1584597
Date : March 29 2020, 07:55 AM
wish helps you Your reference to s in s.getBytes is probably null. So that means what is getting executed is something like
code :
byte buf[] = null.getBytes();
String s = data[i-2][j];
byte buf[];
if (s != null) 
    buf = s.getBytes();
   buf = //What do you want the default behavior to be? maybe "".getBytes()?
Nullpointer exception Java

Nullpointer exception Java

By : Lord Fiero
Date : March 29 2020, 07:55 AM
To fix the issue you can do The line Track most = tracks.get(0); can throw a NullPointerException since the code does not show if track was initialized. If it was not, it will be null and it there is no method get in null (there is no method at all, actually).
NullPointer exception testing servlet using mockito

NullPointer exception testing servlet using mockito

By : Chris M
Date : March 29 2020, 07:55 AM
help you fix your problem Your problem is that you've mocked the ArrayList, which means that its add method will do nothing, so s1 and s2 are never in the list. Don't mock ArrayList - use a real ArrayList instead.
Also verify(is.findAll(),atLeast(1)); should read verify(is,atLeast(1)).findAll();
Exception in thread "main" java.lang.NoClassDefFoundError: org/mockito/Mockito

Exception in thread "main" java.lang.NoClassDefFoundError: org/mockito/Mockito

By : Sumwan
Date : March 29 2020, 07:55 AM
it fixes the issue The scope test indicates that the dependencies (binary files) are only used using maven's test phase. They are not delivered with the final target jar though. So if you run tests yourself (rather than letting maven do it), you'd better leave the default runtime scope, as follows:
code :
Nullpointer exception on constructor injection and works with field injection mockito

Nullpointer exception on constructor injection and works with field injection mockito

By : Grabz
Date : March 29 2020, 07:55 AM
this will help Lombok's @AllArgsConstructor and @RequiredArgsConstructor only cover fields that are declared in the class itself. Fields from superclasses are not considered, as lombok cannot access those classes, because they are not yet resolved at the time lombok runs during the compilation process.
As a result in your case, the constructor that is generated for ClassA only has ClassD classD as argument, but not ClassC classC. (You can see that in the class outline view of your IDE, or by delomboking your code.) Therefore, classC remains uninitialized, causing the NPE.
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