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Java Examples
https://github.com/mincong-h/java-examples
assertj basics java jax-rs jgit learning maven mockito xml xpath
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Java Examples
Host: GitHub
URL: https://github.com/mincong-h/java-examples
Owner: mincong-h
Created: 2016-08-09T15:07:53.000Z (over 8 years ago)
Default Branch: master
Last Pushed: 2023-01-12T04:06:48.000Z (almost 2 years ago)
Last Synced: 2024-04-17T10:59:36.651Z (7 months ago)
Topics: assertj, basics, java, jax-rs, jgit, learning, maven, mockito, xml, xpath
Language: Java
Homepage:
Size: 1.18 MB
Stars: 10
Watchers: 2
Forks: 8
Open Issues: 26
Metadata Files:
- Readme: README.md
Awesome Lists containing this project

README

        # Java Examples [![Build Status][actions-img]][actions]

A Maven project for learning Java during my free time. Most of the explanations are

written directly in the code as Javadoc. I use tests to understand technical detail

in different frameworks. You can run these tests using:

    mvn clean install

This project is tested under Java 11 and Java 15.

## Module List

Module | Description

:--- | :---

Akka | Build highly concurrent, distributed, and resilient message-driven applications on the JVM 

AssertJ | [AssertJ][assertj] testing framework.

Basic | Basic usage of Java core APIs.

CLI | [Apache Commons CLI][commons-cli].

Date | Date manipulation using `java.util.*` and `java.time.*`.

Elasticsearch | [Elasticsearch](https://github.com/elastic/elasticsearch): Open source, distributed, RESTful search engine

Encoding | Encoding challenge in Java.

gRPC | A high performance, open source universal RPC framework. 

IO | Java File I/O.

Immutables | Generate simple, safe and consistent value objects. 

Jackson | Jackson, a high-performance JSON processor for Java.

Java 8 | New functionality of Java 8, including filter, map, stream.

Jetty | Jetty Server.

JGit | Basic usages of [JGit][jgit].

JMH | Java Microbenchmark Harness (JMH).

JSON | JSON conversion libraries in Java.

JUnit 4 | JUnit 4 testing framework.

JUnit 5 | JUnit 5 testing framework.

Logback | [Logback](http://logback.qos.ch/) logging framework.

Maven | Basic functionality of Maven.

Mongo | The MongoDB database

Mockito | [Mockito](https://site.mockito.org/), the most popular mocking framework for Java unit tests

OCA | Oracle Certified Associate Java SE 8

OCP | Oracle Certified Professional Java SE 8

Reliability | Tips to make production more reliable.

Rest | RESTful API using [Jersey][jersey].

Spring Boot | Spring boot.

Spring Data MongoDB | Spring data integration for MongoDB.

Typesafe Config | [Typesafe Config](https://github.com/lightbend/config), configuration library for JVM languages.

XML | XML serialization, XPath, XSD.

VAVR | Functional component library that provides persistent data types and functional control structures.

## Articles

Here are some blog posts that I wrote using the source code of this repository and related satellite repositories. Visit 

to see the complete list.

### Akka

- [Write An Actor In Akka](https://mincong.io/2020/06/20/akka-actor/)

- [Testing Actor with TestActorRef](https://mincong.io/2020/01/08/akka-testing-actor-with-testactorref/)

### Java Annotation Processing

- [Why You Should Use Auto Value in Java?](https://mincong.io/2018/08/21/why-you-should-use-auto-value-in-java/)

- [Introduction of Immutables](https://mincong.io/2020/04/13/introduction-of-immutables/)

- [Introduction to Google Error Prone](https://mincong.io/2020/11/08/google-error-prone/)

### Java Core

- [Glob Expression Understanding](https://mincong.io/2019/04/16/glob-expression-understanding/)

- [Unzipping File in Java](https://mincong.io/2019/10/27/unzipping-file-in-java/)

- [Fixng Comparator](https://mincong.io/2019/07/18/fixing-comparator/)

- [Understanding ISO-8859-1 / UTF-8](https://mincong.io/2019/04/07/understanding-iso-8859-1-and-utf-8/)

### Java Concurrency

- [Why Do We Need Completable Future?](https://mincong.io/2020/06/26/completable-future/)

- [3 Ways to Handle Exception In Completable Future](https://mincong.io/2020/05/30/exception-handling-in-completable-future/)

- [How CompletableFuture is tested in OpenJDK?](https://mincong.io/2020/05/10/completablefuture-test/)

- [Using 100% CPU with ExecutorService.invokeAll()](https://mincong.io/2019/01/29/executorservice-invokeall/)

### Java Date

Date manipulation using `java.util.*` and `java.time.*`.

- [Using Java Time In Different Frameworks](https://mincong.io/2020/10/25/java-time/)

- [Controlling Time with Java Clock](https://mincong.io/2020/05/24/java-clock/)

- [Convert Date to ISO 8601 String in Java](https://mincong.io/2017/02/16/convert-date-to-string-in-java/)

### Java Logging

- [Logback: Test Logging Event](https://mincong.io/2020/02/02/logback-test-logging-event/)

- [SLF4J Understanding](https://mincong.io/2019/03/12/slf4j/)

- [What I know about logs](https://mincong.io/2019/03/05/logs/)

### Java Testing

Mockito, the most popular mocking framework for

Java unit tests. https://site.mockito.org

- [Mockito: 3 Ways to Init Mock in JUnit 5](https://mincong.io/2020/04/19/mockito-junit5)

- [Mockito: 3 Ways to Init Mock in JUnit 4](https://mincong.io/2019/09/13/init-mock)

- [Mockito: ArgumentCaptor](https://mincong.io/2019/12/15/mockito-argument-captor)

- [Mockito: 4 Ways to Verify Interations](https://mincong.io/2019/09/22/mockito-verify)

- [Testing with GwtMockito](https://mincong.io/2019/08/26/testing-with-gwtmockito)

JUnit, the programmer-friendly testing framework for Java and the JVM:

- [Writing Parameterized Tests in JUnit 5](https://mincong.io/2021/01/31/juni5-parameterized-tests/)

- [JUnit 5: Dynamic Tests with TestFactory](https://mincong.io/2021/04/09/junit-5-dynamic-tests/)

### Java Serialization

- [Use Auto Value and Jackson in REST API](https://mincong.io/2018/06/19/auto-value-and-jackson/)

- [Jackson XML Mapper](https://mincong.io/2019/03/19/jackson-xml-mapper/)

- [Vavr Jackson 1.0.0 Alpha 3 release notes](https://mincong.io/2020/07/11/vavr-jackson-1.0.0-alpha-3/)

- [Making Backward-Compatible Schema Changes in MongoDB](https://mincong.io/2021/02/27/mongodb-schema-compatibility/)

### Reliability

- [Create a Throttler in Java](https://mincong.io/2020/11/07/throttler/)

- [Feature Flag: Making Your Application More Reliable](https://mincong.io/2020/11/11/feature-flag/)

### Elasticsearch

- [Testing Elasticsearch With Docker And Java High Level REST Client](https://mincong.io/2020/04/05/testing-elasticsearch-with-docker-and-java-client/)

- [Testing Elasticsearch with ESSingleNodeTestCase](https://mincong.io/2019/11/24/essinglenodetestcase/)

- [Elasticsearch: cat nodes API](https://mincong.io/2020/03/07/elasticsearch-cat-nodes-api/)

- [Elasticsearch: Scroll API in Java](https://mincong.io/2020/01/19/elasticsearch-scroll-api/)

- [Indexing New Data in Elasticsearch](https://mincong.io/2019/12/02/indexing-new-data-in-elasticsearch/)

- [Common Index Exceptions](https://mincong.io/2020/09/13/es-index-exceptions/)

- [Wrap Elasticsearch Response Into CompletableFuture](https://mincong.io/2020/07/26/es-client-completablefuture/)

- [Discovery in Elasticsearch](https://mincong.io/2020/08/22/discovery-in-elasticsearch/)

- [GC in Elasticsearch](https://mincong.io/2020/08/30/gc-in-elasticsearch/)

- [18 Allocation Deciders in Elasticsearch](https://mincong.io/2020/09/27/shard-allocation/)

- [Using Java Time in Different Frameworks](https://mincong.io/2020/10/25/java-time/)

- [DVF: Indexing New Documents](https://mincong.io/2020/12/16/dvf-indexing/)

- [DVF: Indexing Optimization](https://mincong.io/2020/12/17/dvf-indexing-optimization/)

- [DVF: Storage Optimization](https://mincong.io/2020/12/25/dvf-storage-optimization/)

- [DVF: Snapshot And Restore](https://mincong.io/2021/01/10/dvf-snapshot-and-restore/)

## Code Style

I use [Google Java Code Style][style-java] for this repo.

[assertj]: http://joel-costigliola.github.io/assertj/

[bm]: http://byteman.jboss.org

[commons-cli]: https://commons.apache.org/proper/commons-cli/

[jersey]: https://jersey.github.io

[jgit]: https://github.com/eclipse/jgit

[style-java]: https://google.github.io/styleguide/javaguide.html

[actions]: https://github.com/mincong-h/java-examples/actions

[actions-img]: https://github.com/mincong-h/java-examples/workflows/Actions/badge.svg