1 1 2 3 3 4 4 1 5 4 6 1 7 4 8 1 9 4 10 Caught class java.lang.RuntimeException 11 1 12 2 13 4 14 1 15 4 16 1 17 4 18 1 19 4 20 Caught class java.lang.NullPointerException 21