void (String[] args) { int notNull = 0; Integer[] a1 = new Integer[2]; a1[0] = null; a1[1] = notNull; System.out.println(a1[0]); System.out.println(a1[1]); Integer[] a2 = new Integer[2]; a2[0] = nullable(); a2[1] = notNull; System.out.println(a2[0]); System.out.println(a2[1]); Integer[] a3 = new Integer[] { null, nullable(), notNull }; System.out.println(a3[0]); System.out.println(a3[1]); System.out.println(a3[2]); }