Android How to Program, 3/e

H Exception Handling: A Deeper Look

Objectives

In this appendix you’ll:

• Learn what exceptions are and how they’re handled.

• Understand when to use exception handling.

• Use try blocks to delimit code in which exceptions might occur.

• throw exceptions to indicate a problem.

• Use catch blocks to specify exception handlers.

• Use the finally block to release resources.

• Become familiar with the exception class hierarchy.

Outline

1. H.1 Introduction

2. H.2 Example: Divide by Zero without Exception Handling

3. H.3 Example: Handling ArithmeticExceptions and InputMismatchExceptions

4. H.4 When to Use Exception Handling

5. H.5 Java Exception Hierarchy

6. H.6 finally Block

7. H.7 Stack Unwinding and Obtaining Information from an Exception Object

8. H.8 Wrap-Up

1. Self-Review ...