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# Intermediate level java

Here we deal with more complex topics in java such as:

## Object oriented ideas

* classes
  * static methods
  * static fields
  * constructors
  * accessors
* objects
  * instance methods
  * instance fields
* Interfaces
* abstract classes
* Inheritence

## Enums

## Packages and imports

* paths
* naming

## Common classes/libraries

* String
  * REGEX
* ArrayList/List
* Map/HashMap
* ZoneDateTime

## Exceptions

* Checked
* Unchecked
* try/catch
* try with resources

## Comparators

* Comparable interface
* compareTo

## Generics

* PECS
* wildcards
* casting
* types