Exception Handling (Midterms)

• is an event that occurs during the execution of a program that disrupts the normal flow of instructions.


  EXCEPTION
• What is an exception?

  An exception is an event that disrupts the normal flow of a program's execution.
• process used to change the normal flow of code execution if a specified exception occurs.


  EXCEPTION HANDLING
• What is an Exception handling?

  a process used to change the normal flow of code execution if a specified exception occurs.
• What is a checked exception?

  Exceptions that occur during compilation
• Exceptions that occur during _______ is called checked exception

  COMPILATION
• Give the list of Cheked Exceptions


  ClassNotFoundException

  IllegalAccessException

  InstantiationException

  NoSucMethodException
• The class is not found.

  ClassNotFoundException
• IllegalAccessException


  Access to a class is denied.
• ClassNotFoundException

  The class is not found.
• InstantiationException

  Attempt to create an object of an abstract class or an interface.
• Attempt to create an object of an abstract class or an interface.

  InstantiationException
• NoSuchMethodException

  The requested method does not exist.
• The requested method does not exist.

  NoSuchMethodException
• exceptions that occur during execution

  Unchecked Exceptions
• Another term for Unchecked Exceptions

  runtime exceptions
• What is the difference between checked and unchecked exceptions

  checked exceptions happens during compilation and must be fixed first before running the program. unchecked or runtime exception happens during execution
• List of unchecked/runtime exception

  ArithmeticException

  ArrayOutOfBoundsException

  ArrayStoreException

  InputMismatchException

  NullPointerException

  NumberFormatException

  StringIndexOutOfBoundsException
• Arithmetic error, such as an integer divided by 0

  ArithmeticException
• Accessing an invalid index of the array

  ArrayIndexOutOfBoundsException
• ArrayIndexOutOfBoundsException


  Accessing an invalid index of the array

• Assigning a value to an array index that does not match

  the expected data type

  ArrayStoreException
• ArrayStoreException


  Assigning a value to an array index that does not match

  the expected data type
• InputMismatchException


  Entering a value that does not match the expected data

  type
• Entering a value that does not match the expected data

  type

  InputMismatchException
• Invalid use of a null reference

  NullPointerException
• NullPointerException


  Invalid use of a null reference
• Invalid use of a null reference

  NullPointerException
• NumberFormatException


  Invalid conversion of a string to a numeric format
• Invalid conversion of a string to a numeric format


  NumberFormatException
• StringIndexOutOfBoundsException


  Accessing an invalid index (character) of a string
• Accessing an invalid index (character) of a string


  StringIndexOutOfBoundsException
• block of code that might throw an exception that can be handled by a matching catch

  block.

  try block
• a try block is block of code that might throw an exception that can be handled by a matching ______ block.

  catch
• catch block


  segment of code that can handle an exception that might be thrown by the try block that precedes it.
• segment of code that can handle an exception that might be thrown by the try block that precedes it.

  catch block
• method can be used to determine Java’s message about the exception


  getMessage()
• What is the syntax for getMessage()


  System.out.println(exceptionName.getMessage());
• True or False: Only one (1) try block is accepted in a program but there can be multiple catch blocks.

  True
• True or False: There can be multiple try block accepted in a program but there can be only one (1) multiple catch blocks.

  False