10 new travel notes from Java-an exception

Import Java. util. arraylist; import Java. util. list; public class A {private int [] arr = new int [3]; private list <string> ls; Public A () {ls = new arraylist <string> (); ls. add ("12");} public int getarrvalue (int I) {return arr [I];} Public String getlistvalue (int I) {return ls. get (I);} public static void main (string [] ARGs) {try {A = new A (); int V1 =. getarrvalue (0); string v2 =. getlistvalue (0); throw new exception ("custom exception occurred");} catch (Java. lang. nullpointerexception e) {system. out. println ("A is not instantiated or. ls not instantiated ");} catch (Java. lang. indexoutofboundsexception e) {system. out. println (". arr value subscript out of bounds or. ls value subscript out of bounds ");} catch (exception e) {e. printstacktrace ();}}}