Day 6

Objectives:

Interfaces
Exception Handling

Lab assignment:

Finish all the practice exercises of Days 1-5
Exercises for Day 6

Lecture slides:

pdf file: Slides for Day 6
files (Employees-Expenses project, interfaces): Employee.java, Expense.java, ExpenseInterfaceTest.java, HourlyEmployee.java, MaintenanceCost.java
files (Rational project, exception handling): Rational.java, RationalTest.java
useful links: Abstract classes compared to Interfaces (by Oracle)
A very good example of interface (by Charlton Smith): Main.java

Although in this example it is possible to use abstract class (in comparison to the Carbon Footprint - where the interface is 100% strategy to use), it seems that it is a trend in Java to do as much as possible via interfaces.

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