Catching Exceptions

• Install an exception handler with try/catch statement
• try block contains statements that may cause an exception
• catch clause contains handler for an exception type
• Example:

  try
  {
     String filename = . . .;
     FileReader reader = new FileReader(filename);
     Scanner in = new Scanner(reader);
     String input = in.next();
     int value = Integer.parseInt(input);
     . . .
  }
  catch (IOException exception)
  {
     exception.printStackTrace();
  }
  catch (NumberFormatException exception)
  {
     System.out.println("Input was not a number");
  }