I need to send an amount of numbers given by the user from Java to an Arduino UNO.

The numbers have to be random.

I had this two ideas:

1. Send the numbers one by one

   for(int count = 0; count< amount; count++){                             
       Arduino.sendData(array[count]);
   }
   

2. Write a TXT file with the numbers and read one by one from there.

Questions:

• Is there anyway to just send the array?

• If using the option 1, I need to do an input = Serial.read(); everytime a new number is sent?

• In option 2, if I can open the txt file and read one by one, can it be done without a SD card? (reading the file from PC)

• Is there another way (not necessarily easier) to do it?