The correct implementation for readRectangles() is option B
B. public static Rectangle[] readRectangles(String filename) throws FileNotFoundException {
Scanner s = new Scanner(new File(filename));
int length = s.nextInt();
Rectangle[] rects = new Rectangle[length];
for (int i = 0; i < length; i++) {
rects[i] = new Rectangle(s.nextInt(), s.nextInt(), s.nextInt(), s.nextInt());
}
s.close();
return rects;
}
It uses scanner to first open the file and then parses the first int to get the length of the array. It then creates an array of required length and loops to create each rectangle object by parsing the 4 consecutive ints.
Suppose you define a file format to describe an array of java.awt.Rectangle objects. You start with...
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