for (int i = 0; i < meinArray.length; i++) {
Arrays.fill(meinArray[i], 1);
}
KlarGeht das eleganter?
int[] row = IntStream.generate(() -> 1).limit(j).toArray();
int[][] arr = Stream.generate(row::clone).limit(i).toArray(int[][]::new);
//Wahlweise:
//int[][] arr = Collections.nCopies(i, row).toArray(new int[i][]);