一、讀取整個檔案內容

InputStream is = getClass().getResourceAsStream("/assets/xxx.txt");
int length = is.available();
byte buffer = new byte[length];
is.read(buffer);
is.close();

二、逐行讀取檔案內容

BufferedReader br = null;
String[] stringArray =new String[6];
ArrayList<Point> P20array= new ArrayList<Point>();
int
 
 x,y;
try {
   br = new BufferedReader(new InputStreamReader(                 getClass().getResourceAsStream("/assets/xxx.txt")));  
   for (String line = br.readLine(); line != null; line = br.readLine()) {
   stringArray=line.split(",");
   x = Integer.parseInt(stringArray[0]);
   y = Integer.parseInt(stringArray[1
 
]);
   Point p20Point= new Point();
   p20Point.x = (int)x;
   p20Point.y = (int)y;
 }
  br.close();
} catch (IOException e) {
  e.printStackTrace();
}