Exceptions and Exception Handling

April 18th, 2016

Slides

Lecture Recording

Lecture Code

• Driver
• Employee
• Lecture
• MyException

Exception Handling

• We want to avoid runtime "crashes" as much as possible.
• Java Exceptions
• Oracle Tutorial

Exceptions

• Exception class
• try {} catch (ExceptionClass exception) {}
• throw new ExceptionClass()
• Error class

User Defined Exceptions

  public class MyException extends ExistingException
  {
    public MyException ()
    {
    }

    public MyException (String message)
    {
      super(message);
    }
  }

Class Exercise

Write a program that asks the user to enter an integer than is ≥ 5 and ≤ 10. The program should continue prompting the user until a valid number is entered.