Java Reference

Java: The Complete Reference, Thirteenth Edition

Regular Expression Pocket Reference: Regular Expressions for Perl, Ruby, PHP, Python, C, Java and .NET (Pocket Reference (O'Reilly))

Murach's Java Servlets and JSP, 2nd Edition

Java Programming Language: a QuickStudy Laminated Reference Guide

Beyond the Asymptote Volume II: The Implementation Edition ElephantSqlDB® Integration Reference for .NET, Java, Python, React, Angular, Vue, Node.js, Golang, Ruby & PHP

JAVA Coding Workbook - Level 3 of 7 - Orange Belt

The Java Developer’s Quick Reference: Essential Syntax, Operators, OOP, Collections, Concurrency, Exceptions, and Core APIs — A Practical Desk Companion

JAVA Coding Workbook - Level 7 of 7 - Black Belt