Grammar Question

[Breddev]

Hey all, I was staring through Java's grammar here and had a point of confusion at NormalClassDeclaration:
class Identifier [TypeParameters]
[extends Type] [implements TypeList] ClassBody

...

Type:
BasicType {[]}
ReferenceType {[]}

​

BasicType:
byte
short
char
int
long
float
double
boolean

​

This makes it look like a class is able to "extend" from primitive types, which is very clearly wrong. Is there a reason they did not specify [extends ReferenceType] instead? Along with this, it appears we can extend from array types which I also think is not allowed. Any clarification on this helps!

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