public static boolean isNonZeroRow(int[][] array2D, int r) {
    boolean hasZero = false;
    for (int i = 0; i < array2D[r].length(); i++) {
        if (array2D[r][i] == 0) {
            hasZero = true;
        }
    }
    return hasZero;
}

b)

public static int[][] resize(int[][] array2D) {
   int[][] toReturn = new int[numNonZeroRows(array2D)][array2D[0].length];
   int k = 0;
   for (int i = 0; i < array2D.length; i++) {
      if (isNonZeroRow(array2D, r)) {
         k++;
         for (int j = 0; j < array2D[0].length; j++) {
            toReturn[k - 1][j] = array2D[i][j]
         }
      }
   }
   return toReturn;   
}