This error is due to the lack of support for primitive Java data types in MATLAB. The "read" method of the FileInputStream class in the java.io package actually expects an array of primitive bytes (byte[]) and not an array of the Byte wrapper object (java.lang.Byte[]).
As a work around, you can use the overloaded read method that does not take any input arguments within a loop:
myFile = java.io.FileInputStream('dummyfile.txt');
b = zeros(1,myFile.available);
for n = 1:length(b)
b(n) = myFile.read;
end
In order to use a function such as this in this manner, you would need to declare the function as follows:
int read(java.lang.Byte[] b)
