1. Java Programming: From Problem Analysis to Program Design, 3e Chapter 12 Handling Exceptions and Events

10. try / catch / finally Block (continued)

15. Java Exception Hierarchy

16. Java Exception Hierarchy (continued)

17. Java Exception Hierarchy (continued)

18. Java Exception Hierarchy (continued)

19. Java Exception Hierarchy (continued)

21. The class Exception and its Constructors

22. Java Exception Classes

23. Java Exception Classes (continued)

24. Java Exception Classes (continued)

25. Java Exception Classes (continued)

26. Java Exception Classes (continued)

27. Java Exception Classes (continued)

28. Java Exception Classes (continued)

29. Java Exception Classes (continued)

34. The class Exception and the Operator instanceof try { System.out.print("Line 4: Enter the " + "dividend: "); dividend = console.nextInt(); System.out.println(); System.out.print("Line 7: Enter the " + "divisor: "); divisor = console.nextInt(); System.out.println(); quotient = dividend / divisor; System.out.println("Line 11: Quotient = " + quotient); } catch (Exception eRef) { if (eRef instanceof ArithmeticException) System.out.println("Line 14: Exception " + eRef.toString()); else if (eRef instanceof InputMismatchException) System.out.println("Line 16: Exception " + eRef.toString()); }

37. Rethrowing and Throwing an Exception (continued) import java.util.*; public class RethrowExceptionExmp1 { static Scanner console = new Scanner(System.in); public static void main(String[] args) { int number; try { number = getNumber(); System.out.println("Line 5: number = " + number); } catch (InputMismatchException imeRef) { System.out.println("Line 7: Exception " + imeRef.toString()); } } }

38. Rethrowing and Throwing an Exception (continued) public static int getNumber() throws InputMismatchException { int num; try { System.out.print("Line 11: Enter an “ + "integer: "); num = console.nextInt(); System.out.println(); return num; } catch (InputMismatchException imeRef) { throw imeRef; } } }

40. The Method printStackTrace (continued) import java.io.*; public class PrintStackTraceExample1 { public static void main(String[] args) { try { methodA(); } catch (Exception e) { System.out.println(e.toString() + " caught in main"); e.printStackTrace(); } }

41. The Method printStackTrace (continued) public static void methodA() throws Exception { methodB(); } public static void methodB() throws Exception { methodC(); } public static void methodC() throws Exception { throw new Exception("Exception generated " + " in method C"); } }

45. Creating Your Own Exception Classes (continued) public class MyDivisionByZeroException extends Exception { public MyDivisionByZeroException() { super ("Cannot divide by zero"); } public MyDivisionByZeroException(String strMessage) { super (strMessage); } }

49. Event Handling (continued)

50. Event Handling (continued)

51. Event Handling (continued)

52. Programming Example: Calculator