1. Haidong Xue Summer 2011, at GSU
Principles of Computer Programming (using Java) Chapter 8 More Control Structures
Haidong Xue
Summer 2011, at GSU

2. Content Quiz4 Assignment5 break and continue in if structure and loops
switch structure
exceptions

3. Quiz4
1:50pm – 2:00pm

4. Assignment5
Answers
Should we output the result in DatabaseLogic.java? Why?

5. break and continue Always exit or go back to the nearest structure
Example: BreakContinue.java

6. Labeled break and continue
Exit or go back to the structure with the label
Example: LabeledBreakContinue

7. switch structure switch ( expression ) {
Integer (int, long ,short), char or enumeration expression
switch ( expression ) {
case constant-expression : statements …
default : statements }
The value can be determined by the compiler

8. switch structure What are the statements that are executed?
The location of default
Example: TestSwitch.java

9. Exceptions Type of exceptions: Throw a exception
Checked exceptions (thrown by throw statements)
Unchecked exceptions (embedded exceptions)
Throw a exception
throw exception_object;

10. Exceptions Handling exceptions Examples: TestExceptions.java
try
block
catch (exception-type identifier)
Examples:
TestExceptions.java
Improve previous codes

11. Assignment 6
Improve assignment 4, to solve the problem when the denominator is 0
Improve assignment 5, to solve the exceptions incurred by illegal inputs

12. Test 2 and Test 3 Test 2: Test 3: Using classes
Structures: if, while, do-while, for, switch
Using arrays
Using methods (how parameters are passed)
Exceptions
Test 3:
Everything

13. Grading policy [50, 100] <=> B-, B, B+, A-, A
[0, 50] <=> F to C