• Java Software | Oracle
    https://www.oracle.com/java/
    Official page - Java for Developers or Consumers
  • Java.net
    https://www.java.net/
    Java.net is a large community of Java developers and their projects. We welcome anyone interested in Java, related JVM technologies, and education to our discussions and projects.
  • BlueJ
    http://www.bluej.org/
    BlueJ is a development environment that allows you to develop Java programs quickly and easily.
  • Hibernate. Everything data. - Hibernate
    http://www.hibernate.org
    Hibernate is an Object/Relational Mapper tool. It's very popular among Java applications and implements the Java Persistence API.
  • JAR Search - findJAR.com
    http://www.findjar.com/
    JAR search engine that helps Java developers to find JAR libraries containing required Java classes.
  • Java Examples | Learn Java Programming by Examples
    http://kodejava.org
    Kodejava website provides Java examples to use the Java API (Application Programming Interface) to build Java applications. In this website you will find a lot of examples grouped by the Java API packages or libraries.
  • Java portál
    http://www.java.cz
    informační základna oborové komunity programovacího jazyka Java. Server publikuje vlastní i převzaté texty a zprostředkuje diskusi na širokou škálu odborných témat. Návštěvníky serveru jsou zejména profesionální vývojáři z České republiky a Slovenska
  • Java Programming: An Introduction to Software Specialization | Coursera
    https://www.coursera.org/specializations/java-programming
    This Specialization covers the fundamentals of software development, focusing on a beginner-level introduction to rigorous problem-solving approaches while still embracing and extending traditional methods of computer science and software engineering. You’ll explore foundational concepts such as algorithm development, data representation, and debugging, using common tools such as HTML/CSS, Javascript, and Java.
  • Java Tutorial | Tutorialspoint
    https://www.tutorialspoint.com/java/
    Java Tutorial for Beginners - Learn Java in simple and easy steps starting from basic to advanced concepts with examples including Java Syntax Object Oriented Language, Methods, Overriding, Inheritance, Polymorphism, Interfaces, Packages, Collections, Networking, Multithreading, Generics, Multimedia, Serialization, GUI.
  • Java | Interval.cz
    http://interval.cz/programovani/java/
    Desítky článků věnované jazyku Java.
  • Java – Články | Programujte.com
    http://programujte.com/clanky/15-java/
    Popisy a tutoriály věnované jazyku Java.
  • JavaSED
    http://www.javased.com/
    Get code examples for popular Java APIs or libraries
  • Portal:Java - Wikipedia
    https://en.wikipedia.org/wiki/Portal:Java
  • ProgramCreek.com
    http://www.programcreek.com/
    This is a site all about Java, including Java Core, Java Tutorials, Java Frameworks, Eclipse RCP, Eclipse JDT, and Java Design Patterns.
  • Programming Tutorials and Source Code Examples
    http://www.java2s.com/
  • RebelLabs Developer Productivity Report 2017: Why do you use the Java tools you use? zeroturnaround.com
    https://zeroturnaround.com/rebellabs/developer-productivity-report-2017-why-do-you-use-java-tools-you-use/
    Developer Productivity Report 2017 is an analytical report, based on an online survey of the Java community about the tools that teams and developers use.
  • The Central Repository Search Engine (Maven)
    http://search.maven.org/
    useful information about artifacts
  • The Java Tutorials | Oracle
    https://docs.oracle.com/javase/tutorial/
    The Java Tutorials are practical guides for programmers who want to use the Java programming language to create applications. They include hundreds of complete, working examples, and dozens of lessons.