error gives null pointer exception even though object is not null

[wooden harbor]

a

[warm epoch]

<@&987246399047479336> please have a look, thanks.

[warm epoch]

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There could be several reasons why a Java error gives a null pointer exception even though the object is not null. Here are a few possible explanations:

1. Incorrect object reference: Make sure that you are using the correct object reference when accessing its methods or properties. It's possible that you are mistakenly using a different object or variable that is null.

2. Null value within the object: Check if any of the properties or variables within the object are null. Even if the main object reference is not null, if any of its internal components are null and you try to access them, it will result in a null pointer exception.

3. Concurrent modification: If multiple threads are accessing and modifying the same object simultaneously, it can lead to unexpected behavior and potentially cause a null pointer exception. Ensure proper synchronization mechanisms are in place to avoid such issues.

4. Exception handling: It's possible that there is an exception being thrown within the code block where you believe the object is not null. If an exception occurs before reaching your intended code block, it can cause confusion and make it seem like the object is causing the issue when it's actually something else.

To debug this issue, you can try printing out relevant values and using conditional statements to check for potential null values before accessing them. Additionally, reviewing your code logic and ensuring proper exception handling can help identify and resolve this error.

[wooden harbor]

we can see from the debugger

that image does exist

so not sure what thats about

[rapid vale]

try putting the rowHead = this.image.getHead() in the constructor after setting the image variable

[wooden harbor]

ah

that worked

why does that fix it?

[rapid vale]

my guess would be that local initialization gets executed before the constructor

[wooden harbor]

ah

[idle shadow]

I don’t think you initialized this.image until the contructor?

[severe ore]

initializations of fields while declaration gets moved to an initializer during compilation which is always run before the constructor, even before the super constructor is called

[wintry ruin]

Interesting pixel font family.

[mystic lantern]

The super constructor is called before instance initialisers.

Meaning it's possible to observe the field uninitialised if you have an override of a method that is called during super-construction.

The initial values are all zero-states. false for boolean, 0 for numeric types and null for references.