nullpointerException

Programming Questions

angelbreak

in Programming Questions • 1 year ago

with this code:

class wavfile{
String name=null;
byte[] data=null;
//constructor
wavfile(String name){
this.name=name;
this.data= loadBytes(this.name);
}
//metadata
void lee_metadatos(){
println(this.data.length);//<<<<<<<errror nullpointException
}
}

the main code

wavfile mywav=new wavfile("piano2.wav");
mywav.lee_metadatos();

and yes, on the skecth folder there is the file piano2.wav

and the error is:

the file "piano2.wav" is missing or inaccesible....

but the file "piano2.wav" there is in the sketch folder!!!

any help me? thanks in advance.

Replies(3)

PhiLho

" the file "piano2.wav" there is in the sketch folder!!!"
loadBytes() reference page: " If a file is specified, it must be located in the sketch's "data" directory/folder."
That's the case for all loadXxx() functions of Processing.

angelbreak

Re: nullpointerException

1 year ago

sorry, i'll want say: data folder, in sketch folder.

angelbreak

Re: nullpointerException

1 year ago

well the error is this:

wavfile mywav=new wavfile("piano2.wav");

the rigth code is:

wavfile mywav;

in the secction setup()

mywav=new wavfile("piano2.wav");

firts create the pointer to the class

y second create the objetct because "this.data= loadBytes(this.name);" must be is on setup() secction.