Advanced Programming | 29. Introduction to Scripting in Java (e.g., JavaScript Engine) by Abraham | Learn Smarter
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29. Introduction to Scripting in Java (e.g., JavaScript Engine)

Java's integration of scripting languages enhances dynamic behavior in applications, enabling real-time script execution, modification of application logic, and support for user-defined logic. This chapter explores the Java Scripting API and its practical applications, primarily focusing on the Nashorn JavaScript engine. It also discusses the advantages and challenges of scripting in Java, alongside alternatives to Nashorn and embedding Groovy as a scripting language.

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Sections

  • 29

    Introduction To Scripting In Java (E.g., Javascript Engine)

    Java incorporates scripting capabilities to allow dynamic behavior in applications through the Java Scripting API.

    Learning Practice

  • 29.0

    Introduction

    This section introduces Java's scripting capabilities, emphasizing the integration of dynamic languages through the Java Scripting API (JSR 223) and the Nashorn JavaScript engine.

    Learning Practice

  • 29.1

    What Is Scripting In Java?

    Scripting in Java allows the integration of dynamic languages into Java applications, enhancing runtime flexibility and extensibility.

    Learning Practice

  • 29.2

    Java Scripting Api (Jsr 223)

    The Java Scripting API (JSR 223) allows Java applications to embed and execute scripts in dynamic languages like JavaScript, enhancing flexibility and reducing the need for recompilation.

    Learning Practice

  • 29.3

    Javascript Engine In Java

    This section discusses the JavaScript engines in Java, focusing on the transition from Rhino to Nashorn and how these engines enable Java applications to run JavaScript code.

    Learning Practice

  • 29.3.1

    Rhino And Nashorn

    Rhino and Nashorn are JavaScript engines used in Java for scripting, with Nashorn replacing Rhino to provide better performance.

    Learning Practice

  • 29.3.2

    Basic Nashorn Example

    The Basic Nashorn Example demonstrates how to execute JavaScript code within a Java application using the Nashorn engine.

    Learning

  • 29.4

    Working With Variables And Bindings

    This section discusses how to pass variables from Java to scripts using Bindings in Java's scripting API.

    Learning Practice

  • 29.5

    Calling Java From Javascript

    This section outlines how to call Java methods and classes from JavaScript using the Nashorn engine.

    Learning Practice

  • 29.6

    Invoking Script Functions From Java

    This section explains how to invoke JavaScript functions from Java using the Invocable interface.

    Learning Practice

  • 29.7

    Scripting Use Cases In Java Applications

    This section outlines various practical use cases where scripting can enhance Java applications.

    Learning Practice

  • 29.8

    Advantages Of Scripting In Java

    Scripting in Java provides flexibility, rapid prototyping, user customization, and seamless integration of dynamic scripting with compiled Java.

    Learning Practice

  • 29.9

    Challenges And Limitations

    This section highlights the key challenges and limitations associated with using scripting in Java applications.

    Learning Practice

  • 29.10

    Alternatives To Nashorn

    With the deprecation of Nashorn, several modern alternatives provide Java developers with robust scripting options.

    Learning Practice

  • 29.11

    Embedding Groovy As A Scripting Language

    This section introduces Groovy as an embedded scripting language within Java applications, demonstrating its implementation and the advantages it offers.

    Learning Practice

  • 29.12

    Practical Example: Business Rule Engine

    This section presents a practical example of how to utilize scripting within Java for implementing a business rule engine.

    Learning Practice

  • 29.13

    Summary

    Java's scripting support enables integration of dynamic languages, enhancing flexibility and allowing runtime execution of scripts.

    Learning Practice

References

Chapter_29_Intro.pdf

Class Notes

Memorization

What we have learnt

  • Scripting in Java allows em...
  • The Java Scripting API (JSR...
  • Nashorn was introduced as a...

Final Test

Revision Tests