Expectation of Exceptional Handling Errors / Exceptions

Course Overview and Homework Assignments

• Midterm exam is scheduled for tomorrow.

• Homework Five has been posted before Homework Four's due date.

  • Focus areas for Homework Five include:

  • Sets

  • Maps

  • Trees

  • Hash Tables

• Knowledge checks have been posted (initially intended for the previous week).

  • Recommended to complete before the midterm, but due Friday.

  • Topics include iterators, sets, and maps.

Course Structure and Assignments

• Total of six homeworks in the course:

  • Five already posted; one more larger assignment or project to follow.

  • Expectation is to tackle substantial material early, leading to a lighter load as the course progresses towards April.

• Encouraged to engage with the posted materials to aid midterm preparation.

Student Questions and Topics

• Instructor encourages student inquiries regarding covered topics or specific questions, including:

  • The try catch block.

Exception Handling in Programming

• Definition of Exceptions: Exceptions are triggered during abnormal events or errors in a program that disrupt standard flow.

  • When to throw exceptions:

  • Correct Use: Only throw exceptions under truly exceptional circumstances (e.g., null nodes in data structures).

  • Incorrect Use: Avoid throwing exceptions for normal user input validation (e.g., negative numbers).

Example Scenario for Exceptions

• Tree Data Structure:

  • Creating a tree object without any initial values.

  • If calling a method on this empty tree results in errors, throw exceptions indicating the absence of values.

• Fraction Class Example:

  • To construct a fraction, both numerator and denominator are required.

  • If either is missing, the fraction class should throw a runtime exception stating the issue, e.g., ( ext{