Try this:
// Serial Communication
Serial myPort;
String[] msg=new String[7];
int[] value=new int[7];
bool debug = true;
// something cut here
// .....
// something cut here
void serialEvent(Serial p) {
String inString = p.readString();
if (inString != null) {
print(inString);
inString=trim(inString);
msg = split(inString, ',');
for (int i=0; i < msg.length; i++ ) {
value[i]=int (msg[i]);
if (debug) println(value[i]+":"+i);
// println(msg[i]);
}
}
}