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- What is a NullPointerException, and how do I fix it?
What about on Android? On Android, tracking down the immediate cause of an NPE is a bit simpler The exception message will typically tell you the (compile time) type of the null reference you are using and the method you were attempting to call when the NPE was thrown This simplifies the process of pinpointing the immediate cause
- When is it OK to catch NullPointerException? - Stack Overflow
In many cases of catching NullPointerException, catch body only calls printStackTrace () That is probably bad code Doing nothing is rarely the correct way to recover from an NPE If I don't catch NullPointerException and call printStackTrace (), how I can check the place where the exception occurred? You let the NPE propagate to the base level There you catch and print (or log) a stacktrace
- Is it okay to throw NullPointerException programmatically?
In the case of a null argument IllegalArgumentException might be the more appropriate exception to throw NullPointerException is meant to indicate that an attempt was made to perform some operation on a null value If an NPE is what you are aiming for, then just forgo null checking in your method, and the NPE will be thrown by the JVM naturally
- Catching nullpointerexception in Java - Stack Overflow
I tried using try-catch block to catch NullPointerException but still the following program is giving errors Am I doing something wrong or is there any other way to catch NullPointerException in
- NullpointerException when stubbing Method - Stack Overflow
The latter solves the NPE keep in mind if you choose this approach, now you might want to include a nullcheck for Boolean in production code (credit: brought up by Ridcully)
- NPE when calling a mocked object (Mockito) - Stack Overflow
1 Where are you getting the NPE? 2 I don't see anywhere in the code MockitoAnnotations initMocks(this); to initialise your mocks; are you using a different runner such as MockitoJUnitRunner? 3 You can configure a mock to return a whole hierarchy of mocks stubs instead of defaults (null, false, 0, etc) This allows mock configuration (even intermediate ones) bypassing the need to create
- how to convert negative integer value to hex in python
Python's integers can grow arbitrarily large In order to compute the raw two's-complement the way you want it, you would need to specify the desired bit width Your example shows -199703103 in 64-bit two's complement, but it just as well could have been 32-bit or 128-bit, resulting in a different number of 0xf 's at the start hex() doesn't do that I suggest the following as an alternative
- Java 8 stream - how to properly make NPE-safe stream
Last week got very strange NPE in a stream that caused my lots of troubles so right now I'm feeling like being over-safe with NPE when using a Stream Here is my method right now: private boolean
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