#Check for a specific generic type

14 messages · Page 1 of 1 (latest)

junior pivot
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I have a variable of the type Supplier<? extends Item> and want to check if it’s Supplier<? extends BlockItem>. Is there a way to do that? instanceOf doesn’t seem to work according to IntelliJ. Minecraft forge 1.16.5 so java 8.

tawdry onyxBOT
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junior pivot
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For context as to what I’m doing I have a function to register a block item from a block but it needs to be delayed from the last function that has the actual block, but I’m trying to make a HashMap keying the blocks to their item in case I need that at some point

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So I’d like to be able to retrieve the block from the BlockItem

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But the same function is used for non block items

shrewd citrus
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can't you use Block#byItem ?

junior pivot
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Probably, I was just giving context on how I came up with my question.

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My question is basically is there a way to check the type of a generic if I have a variable of type X<? extends T>

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Basically can I check if that variable is an instance of X<? extends Y> where Y extends T

next axle
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I'm sure you understand that in the case of List it is impossible by definition

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So it may possible with your particular generic type, but in general it's not

junior pivot
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Ok thank you

tawdry onyxBOT
# junior pivot Ok thank you

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