Java / JPMS
1. What is Java Platform Module System (JPMS)/ Modules?
The Java Platform Module System (JPMS), introduced in Java 9, is a fundamental change to the structure of the Java platform. It aims to improve the security, maintainability, and scalability of Java applications. JPMS achieves this by introducing the concept of modules, which are self-contained u...
2. Key features of JPMS.
Modularity: JPMS divides code into modules, each with a module-info.java file declaring its dependencies and exported packages. Strong Encapsulation: Modules can control which packages are accessible to other modules, enhancing security and reducing unintended dependencies. Reliable Configuration...
3. Types of Modules in JPMS.
System Modules: Modules that comprise the Java SE platform and the JDK. Application Modules: Custom modules created by developers for their applications. Automatic Modules: JAR files on the module path that are treated as modules, providing compatibility with older libraries. Unnamed Module: A ca...
4. How JPMS/Modules works?
JPMS introduces a new level of abstraction above packages. Modules are defined using the module keyword in a module-info.java file. This file specifies: Module Name: A unique identifier for the module. Dependencies (requires): Other modules that this module depends on. Exported Packages (exports)...
5. Benefits of using JPMS.
Improved Security: Strong encapsulation prevents unauthorized access to internal APIs. Better Maintainability: Modular code is easier to understand, test, and modify. Increased Reliability: Explicit dependencies ensure that all required components are present. Enhanced Scalability: Large applicat...
6. How do you implement JPMS in your Java Project?
Define Modules: Create module-info.java files for each module. Compile Modules: Use the javac compiler with module path options. Package Modules: Package modules into JAR files. Run Applications: Use the java command with module path options. // module - info . java module com . example . mymodul...
