B4J Question arrays in a type definition

[MbedAndroid]

i'm facing something with b4j
when i define a type for example type mytype(a(64) as int, b(64) as int)
next i define a global
dim new as mytype

in the code i do new.a(3)=14 the program crashes ...with nullpointer exeption .. why?
b4j accepts the array in the type, no errors given but i cant write into it

 

[LucaMs]

You must initialize "new"

new.Initialize
new.a(3) = 14
log(new.a(3))

 

[MbedAndroid]

just checked the code
the global is initialized, but it might be the problem that the type i defined contains many things, not only the arrays

in fact what i do is for example: type new(a as int, b as int, c(64) as int, d as float etc

 

[LucaMs]

You can add "many things" in a Type, it should work. The problem is elsewhere, for sure.

Anyway, I suggest you to use a Class instead of Types.

 

[MbedAndroid]

yes i noticed this already copying the type to a new project
something else is causing this problem

edit: found it, somewhere in the startup i was reading the global back with saved data, and the data wasnt updated to the new type... stupid me, forget the save the new format

 

[LucaMs]

type new(a as int, b as int, c(64) as int, d as float etc

Are you using exactly this definition?
In the first post you used MyType and a variable "new" as MyType

 

[MbedAndroid]

see post #5, problem fixed, thank you

 

[LucaMs]

This works ("new" is a bad type name, of course )

Type new(a As Int, b As Int, c(64) As Int, d As Float)


Dim a As new
a.Initialize
a.c(2) = 5
Log(a.c(2))