ChatGPT for Java: A Hands-on Developer’s Guide to ChatGPT and Open AI APIs

Table of Contents
About the Author
About the Technical Reviewer
Foreword
Chapter 1: Introducing ChatGPT for Java Developers
	Who Is This Book For?
	Chapter Overview
	Download the Code Now!
	So, What Exactly Is ChatGPT and Why Do I Need to Use the OpenAI APIs?
	Regex vs. ChatGPT: Fight!
		Analysis Question #1: Who Didn’t Get Any Ice Cream and Why?
		Analysis Question #2: Which Kid Was Probably Left Sad?
	Let’s Unlearn Some Words in Order to Learn More About the ChatGPT API
		Models. Models? Models!!!
		When We Talk About Tokens, Think About the StringTokenizer and Not Access Tokens
		Temperature Is All About Creativity
	Getting Started with the OpenAI Playground
		1. System
		2. User
		3. Assistant (Optional)
		4. Add Message (Optional)
		5. View Code (Optional)
		6. Model (Optional)
		7. Temperature (Optional)
		8. Maximum Length (Optional)
	Try It Now! Experimenting with the “System” Role
	Conclusion
Chapter 2: Using ChatGPT As Your Java Pair-Programmer
	Creating Your First Java ChatGPT App: ListModels.java
	List Models Endpoint
		Creating the Request
		Handling the JSON Response
		Model (JSON)
	Chat Endpoint
		Creating the Request
		Chat (JSON)
		Handling the Response
		Chat Completion (JSON)
	Wait, How Many Tokens Are in My Prompt?
		ChatGPT Token Counter
	Creating the Next Java App: ChatGPTClient.java
	Conclusion
Chapter 3: Using AI in the Enterprise! Creating a Text Summarizer for Slack Messages
	So, What Is Prompt Engineering?
	Updating ChatGPTClient.java (and Related Classes) with the Builder Pattern
	ChatGPT Is Here to Take Away Everyone’s Jobs (Not Really)
	Examining a Real World Problem: Customer Support for a Software Company
	Prompt Engineering 101: Text Summarization
		Prompt #1: “tl;dr”
		Prompt #2: “Explain This in 3 Sentences or Less”
		Prompt #3: “I’m a Manager. Explain to Me What Happened”
		Prompt #4: “Give Me Suggestions on Next Steps”
		Let’s Talk About Real Prompt Engineering
	Registering a Slack Bot App
		Specifying What Your Bot Can (and Can’t) Do By Setting the Scope
		Confirming Your Settings
		Viewing the OAuth and Permissions Page
		Installing Your Slack Bot App to Your Workspace
		Getting Your Slack Bot (Access) Token
		Inviting Your Bot to Your Channel
	Finding the Channel ID of Your Channel
	Using Your Slack Bot App to Automatically Grab Messages from a Channel
		Setting Up Your Dependencies
		Programmatically Reading Messages from Slack with ChannelReaderSlackBot.java
	Exercises Left for the Reader
	Conclusion
Chapter 4: Multimodal AI: Creating a Podcast Visualizer with Whisper and DALL·E 3
	Introducing the Whisper Model by OpenAI
	Features and Limitations of the Whisper Model
	Transcriptions Endpoint
		Creating the Request
		Request Body (Multipart Form Data)
	Creating a Utility App to Split Audio Files: AudioSplitter.java
	Creating the Audio Transcriber: WhisperClient.java
	Having a Little Fun and Trying Things Out with a Podcast
	Going Meta: Prompt Engineering GPT-4 to Write a Prompt for DALL·E
	Create Image Endpoint
		Creating the Request
		Create Image (JSON)
		Handling the Response
		Image (JSON)
	Creating the Image Generator: DALLEClient.java
	DALL·E Prompt Engineering and Best Practices
		DALL·E Golden Rule #1: Get Familiar with the Types of Images that DALL·E Can Generate
		DALL·E Golden Rule #2: Be Descriptive with What You Want in the Foreground and Background
	Conclusion
	Exercises Left for the Reader
Chapter 5: Creating an Automated Community Manager Bot with Discord and Java
	Choosing Discord as Your Community Platform
	Creating a More Advanced Bot Than Our Slack Bot
	Creating a More Advanced Bot Than Any Typical Discord Bot
		Understanding the Roles for the Bots
	Our Example Bank: Crook’s Bank
	First Things First: Create Your Own Discord Server
	Create the Q&A Channel
	Registering a New Discord Bot App with Discord
	Specifying General Info for the Bot
	Specifying OAuth2 Parameters for the Bot
	Invite Your Bot to Your Server
	Getting the Discord ID Token for Your Bot and Setting the Gateway Intents
	Creating a Q&A Bot App in Java to Answer Questions from a Channel
		Setting Up Your Dependencies
	Creating The First Discord Bot: TechSupportBotDumb.java
		Loving the Lambda Expression to Simplify Code
		Handling Messages Sent to the Discord Server
		Success! Running Your First Discord Bot: TechSupportBotDumb.java
	Streamlining the Process of Registering Our Next Discord Bot App with Discord
		Registering a New Discord Bot App with Discord
		Specifying General Info for the Bot
		Specifying OAuth2 Parameters for the Bot
		Invite Your Bot to Your Server
		Getting the Discord ID Token for Your Bot and Setting the Gateway Intents
	Creating the Next Discord Bot: ContentModeratorBotDumb.java
		Handling Messages Sent to the Discord Server
		Success Again! Running Your Second Discord Bot: ContentModeratorBotDumb.java
	Conclusion
	Exercises Left for the Reader
Chapter 6: Adding Intelligence to Our Discord Bots, Part 1: Using the Chat Endpoint for Q&A
	Making TechSupportBot.java More Intelligent
	Important Changes to Note from the  Previous Version of the Tech Support Bot
		Updates to the onMessageReceived() Method
	Analyzing ChatGPTClientForQAandModeration.java
		Using JSONPath in Order to Extract Content Quickly in JSON Files
		Running Our Intelligent Q&A Bot: TechSupportBot.java
	We Have a Monumental Achievement… With One Slight Flaw
	Update the System Message to ChatGPT and Let’s Try Again
	Conclusion
Chapter 7: Adding Intelligence to Our Discord Bots, Part 2: Using the Chat and Moderation Endpoints for  Moderation
	Moderations Endpoint
		Creating the Request
		Create Moderation (JSON)
		Handling the JSON Response
		Moderation (JSON)
	Creating Our Client for the Moderations Endpoint: ModerationClient.java
	Making ContentModeratorBot.java More Intelligent
	Important Changes to Note from the Previous Version of the Content Moderator Bot
		Updates to the onMessageReceived() Method
	Running Our Intelligent Content Moderator Bot: ContentModeratorBot.java
	Conclusion
	Exercises Left for the Reader
Appendix 1: List of OpenAI Models
Index