This is a demonstration of the try-catch-finally exception handling mechanism in java programming language.
It shows different mechanisms on how to handle exceptions, catch errors and show error messages.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | // Demonstration of the try-catch-finally // exception handling mechanism. public class UsingExceptions { public static void main(String args[]) { try { throwException(); } catch (Exception e) { System.err.println("Exception handled in main"); } doesNotThrowException(); } public static void throwException() throws Exception { // Throw an exception and immediately catch it. try { System.out.println("Method throwException"); throw new Exception(); // generate exception } catch (Exception e) { System.err.println( "Exception handled in method throwException"); throw e; // rethrow e for further processing // any code here would not be reached } finally { System.err.println( "Finally executed in throwException"); } // any code here would not be reached } public static void doesNotThrowException() { try { System.out.println("Method doesNotThrowException"); } catch (Exception e) { System.err.println(e.toString()); } finally { System.err.println( "Finally executed in doesNotThrowException"); } System.out.println( "End of method doesNotThrowException"); } } /************************************************************************** * (C) Copyright 1999 by Deitel & Associates, Inc. and Prentice Hall. * * All Rights Reserved. * * * * DISCLAIMER: The authors and publisher of this book have used their * * best efforts in preparing the book. These efforts include the * * development, research, and testing of the theories and programs * * to determine their effectiveness. The authors and publisher make * * no warranty of any kind, expressed or implied, with regard to these * * programs or to the documentation contained in these books. The authors * * and publisher shall not be liable in any event for incidental or * * consequential damages in connection with, or arising out of, the * * furnishing, performance, or use of these programs. * *************************************************************************/ |
