Sellable

• Interfaces
• Why we declared these two functions here

Vehicle

• Abstract classes
• Abstract classes vs interfaces
• Comparable
• Ternary statements

Car

• Simple subclass for Vehicle abstract class
• Referencing super() constructor
• @Override annotation

SortingExample

• How to use built in sorting functions with collections
• Demonstrate simple usage of a Comparable in sorting

Truck

• Overriding superclass methods

Bicycle

• Extending a class while implementing an interface
• Final object properties
• Primitive variable defaults (why set salePrice to -1)

MountainBike

• Extending a subclass
• Creating a more specialized constructor
• Final class

Depot

• Iterable
• Declaring ArrayList, how lists work
• Wrapper around arraylist
• Built to be easily sortable
• Comparable vs Comparator

GenericCompare, GenericVehicleCompare, MaxSpeedCompare, SortingFunction

• All used for SortingExample below

• Records*
• Generics*
• @FunctionalInterface annotation*

SortingExample2

• var usage
• How to use built in sorting functions with collections
• Iterating over custom iterable class (for var vehicle : depot)
• Sorting using custom comparators
• Anonymous classes*
• Lambda declaration*
• Method reference usage*

Product

• Overloaded methods/constructors
• Overriding toString()
• Overriding equals() and hashCode()

SetExample

• Declaring HashSets, how sets work
• Overriding equals() and hashCode()

MapExample, MapExample2

• Declaring HashMaps, how maps work
• Various map methods: put(), entrySet(), keySet(), values(), containsKey(), getOrDefault()

Warehouse

• Iterable
• Combining collections in one object
• Manipulating object properties within constructor
• Generating random numbers in java
• Using store() to protect access to our collections properties
• Using getProductId() to provide access to our private object data
• Pattern recognition with instanceof keyword (in store())

InstanceOfExample, InstanceOfExample2

• instanceof keyword and usage
• Using instanceof to deal with unknown object types
• Static keyword
• Classes as objects

MapExample3

• Combining on-the-fly collections with collection-based objects like Warehouse
• Using maps to organize data
• Dealing with unknown object types
• TreeSet example

FailExamples

• Foreach can cause thread exceptions because it uses iterable under the hood
• Difference in philosophy when providing various collections classes: fail-fast vs fail-safe
• ConcurrentModificationException