SE450: Horstmann Chapter 1: Exception Handling

Example: NullPointerException

String name = null;
int n = name.length(); // ERROR

Unless there is a handler, program exits with stack trace

Exception in thread "main" java.lang.NullPointerException 
 at Greeter.sayHello(Greeter.java:25) 
 at GreeterTest.main(GreeterTest.java:6)