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Learn Java 8 by reviewing OCA and OCP

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# Java8 learning
![Language](https://img.shields.io/badge/language-Java%20-red.svg) 
Preparation for **[Oracle® Certified Professional Java® SE 8 Programmer II](https://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=654&get_params=p_id:357&p_org_id=1001&lang=US#tabs-2-1)**

## Table of Contents

* **[Advanced Class Design](#advanced-class-design)**
* **[Design Patterns and Principles](#design-patterns-and-principles)**
* **[Generics and Collections](#generics-and-collections)**
* **[Functional Programming](#functional-programming)**
* **[Dates, Strings, and Localization](#dates-strings-and-localization)**
* **[Exceptions and Assertions](#exceptions-and-assertions)**
* **[Concurrency](#concurrency)**
* **[IO](#io)**
* **[NIO.2](#nio2)**
* **[JDBC](#jdbc)**

### Advanced Class Design

- [Anonymous Inner Class](./Java-8/src/advancedClassDesign/AnonymousInnerClass.java) 
- [Hash Code](./Java-8/src/advancedClassDesign/HashCode.java) 
- [Local Inner Class](./Java-8/src/advancedClassDesign/LocalInnerClass.java) 
- [Member Inner Class](./Java-8/src/advancedClassDesign/MemberInnerClass.java) 
- [Polymorphism](./Java-8/src/advancedClassDesign/Polymorphism.java) 
- [Static Nested Class](./Java-8/src/advancedClassDesign/StaticNestedClass.java)

### Design Patterns and Principles

- [Builder Pattern](./Java-8/src/designPatternsAndPrinciples/BuilderPattern.java) 
- [Composing Objects](./Java-8/src/designPatternsAndPrinciples/ComposingObjects.java) 
- [Define Functional Interface](./Java-8/src/designPatternsAndPrinciples/DefineFunctionalInterface.java) 
- [Desing Interface](./Java-8/src/designPatternsAndPrinciples/DesingInterface.java) 
- [Extend Interface](./Java-8/src/designPatternsAndPrinciples/ExtendInterface.java) 
- [Factory Pattern](./Java-8/src/designPatternsAndPrinciples/FactoryPattern.java) 
- [Immutable Object](./Java-8/src/designPatternsAndPrinciples/ImmutableObject.java) 
- [Implementing Functional Interfaces With Lambdas](./Java-8/src/designPatternsAndPrinciples/ImplementingFunctionalInterfacesWithLambdas.java) 
- [Implementing Polymorphism](./Java-8/src/designPatternsAndPrinciples/ImplementingPolymorphism.java) 
- [One Object Take Many Different Forms](./Java-8/src/designPatternsAndPrinciples/OneObjectTakeManyDifferentForms.java) 
- [Singleton Pattern1](./Java-8/src/designPatternsAndPrinciples/SingletonPattern1.java) 
- [Singleton Pattern2](./Java-8/src/designPatternsAndPrinciples/SingletonPattern2.java) 
- [Singleton Pattern3](./Java-8/src/designPatternsAndPrinciples/SingletonPattern3.java)

### Generics and Collections

- [Array and ArrayList](./Java-8/src/genericsAndCollections/ArrayAndArrayList.java) 
- [Comparing Multiple Fields](./Java-8/src/genericsAndCollections/ComparingMultipleFields.java) 
- [Generic Bound](./Java-8/src/genericsAndCollections/GenericBound.java) 
- [Generic Class](./Java-8/src/genericsAndCollections/GenericClass.java) 
- [Generic Interface](./Java-8/src/genericsAndCollections/GenericInterface.java) 
- [Searching and Sorting](./Java-8/src/genericsAndCollections/SearchingAndSorting.java) 
- [Using Comparable](./Java-8/src/genericsAndCollections/UsingComparable.java) 
- [Using Comparable1](./Java-8/src/genericsAndCollections/UsingComparable1.java) 
- [Using Comparator](./Java-8/src/genericsAndCollections/UsingComparator.java) 
- [Using List](./Java-8/src/genericsAndCollections/UsingList.java) 
- [Using Map](./Java-8/src/genericsAndCollections/UsingMap.java) 
- [Using Queue](./Java-8/src/genericsAndCollections/UsingQueue.java) 
- [Using Set](./Java-8/src/genericsAndCollections/UsingSet.java) 
- [Wrapper Classes and Autoboxing](./Java-8/src/genericsAndCollections/WrapperClassesAndAutoboxing.java)

### Functional Programming

- [Built-in Functional Interfaces](./Java-8/src/functionalProgramming/BuiltInFunctionalInterfaces.java) 
- [Returning an Optional](./Java-8/src/functionalProgramming/ReturningAnOptional.java) 
- [Stream Common Intermediate Oprations](./Java-8/src/functionalProgramming/StreamCommonIntermediateOprations.java) 
- [Stream Common Terminal Operations](./Java-8/src/functionalProgramming/StreamCommonTerminalOperations.java) 
- [Stream Sources](./Java-8/src/functionalProgramming/StreamSources.java) 
- [Stream Working with Primitives](./Java-8/src/functionalProgramming/StreamWorkingWithPrimitives.java) 
- [Using Variables in Lambdas](./Java-8/src/functionalProgramming/UsingVariablesInLambdas.java) 
- [Working with Advanced Stream Pipeline Concepts](./Java-8/src/functionalProgramming/WorkingWithAdvancedStreamPipelineConcepts.java)

### Dates, Strings, and Localization

- [Dates and Times](./Java-8/src/datesStringsLocalization/DatesAndTimes.java) 
- [Formatting Dates and Times](./Java-8/src/datesStringsLocalization/FormattingDatesAndTimes.java) 
- [Formatting Numbers](./Java-8/src/datesStringsLocalization/FormattingNumbers.java) 
- [Internationalization and Localization](./Java-8/src/datesStringsLocalization/InternationalizationLocalization.java)

### Exceptions and Assertions

- [Assertions](./Java-8/src/exceptionsAndAssertions/Assertions.java) 
- [Calling Methods that Throw Exceptions](./Java-8/src/exceptionsAndAssertions/CallingMethodsThatThrowExceptions.java) 
- [Catching Various Types of Exceptions](./Java-8/src/exceptionsAndAssertions/CatchingVariousTypesOfExceptions.java) 
- [Common Exception Types](./Java-8/src/exceptionsAndAssertions/CommonExceptionTypes.java) 
- [Creating Custom Exceptions](./Java-8/src/exceptionsAndAssertions/CreatingCustomExceptions.java) 
- [Exception Intro](./Java-8/src/exceptionsAndAssertions/ExceptionIntro.java) 
- [Nested Exception](./Java-8/src/exceptionsAndAssertions/NestedException.java) 
- [Try with Resources](./Java-8/src/exceptionsAndAssertions/TryWithResources.java) 
- [Using Multi-Catch](./Java-8/src/exceptionsAndAssertions/UsingMultiCatch.java)

### Concurrency

- [Creating Threads with the ExecutorService](./Java-8/src/concurrency/CreatingThreadsWithTheExecutorService.java) 
- [Identifying Threading Problems](./Java-8/src/concurrency/IdentifyingThreadingProblems.java) 
- [Introducing Threads](./Java-8/src/concurrency/IntroducingThreads.java) 
- [Managing Concurrent Processes](./Java-8/src/concurrency/ManagingConcurrentProcesses.java) 
- [Synchronizing Data Access](./Java-8/src/concurrency/SynchronizingDataAccess.java) 
- [Using Concurrent Collections](./Java-8/src/concurrency/UsingConcurrentCollections.java) 
- [Working with Parallel Streams](./Java-8/src/concurrency/WorkingWithParallelStreams.java)

### IO

- [File Class](./Java-8/src/io/FileClass.java) 
- [Iteracting with Users](./Java-8/src/io/IteractingWithUsers.java) 
- [Streams](./Java-8/src/io/Streams.java) 
- [Streams Continue](./Java-8/src/io/StreamsContinue.java)

### NIO.2

- [Creating Paths](./Java-8/src/nio2/CreatingPaths.java) 
- [Interacting with Paths and Files](./Java-8/src/nio2/InteractingWithPathsAndFiles.java) 
- [New Stream Methods](./Java-8/src/nio2/NewStreamMethods.java) 
- [Understanding File Attributes](./Java-8/src/nio2/UnderstandingFileAttributes.java)

### JDBC

- [Connecting a DataBase](./Java-8/src/jdbc/ConnectingADataBase.java)

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