jigsaw

This question already has an answer here: What's the difference between requires and requires static in module declaration 2 answers Does the Java 9 Module system support optional dependencies? 1 answer I started to learn jigsaw java-9 feature and read some articles/video. I can't understand concept of optional dependencies( requires static ) quote from article : When a module needs to be compiled against types from another module but does not want to depend on it at run time, it can use a requires static clause. If foo requires static bar, the module system behaves different at compile and

I am trying to run below code using jdk-9 but facing problem when compile using command Command javac -d mods .\module-info.java com\nirav\modi\Test.java Error .\module-info.java:1: error: class, interface, or enum expected module module1 { } ^ 1 error module-info.java module module1 { } Test.java package com.nirav.modi; class Test { public static void main(String args[]){ System.out.println("Hello Modular..."); } } package structure is like below module1\module-info.java module1\com\nirav\modi\Test.java JDK Version java version "9-ea" Java(TM) SE Runtime Environment (build 9-ea+153) Java

In Java 9's module declaration there are 2 constructs: exports com.foo; And opens com.foo; Where exports grants compile-time access, while opens allows runtime access, as reflection and resources. opens has one leniency over exports that you can define the whole module as open, resulting the same as explicitly opening every package: open module com.mod { But there's no similar construct exported module com.mod { My Question : Why is it so; what decisions has been made to allow opening the whole module at once but not with exporting? A module's exports define its API, which should be

I'm debugging why in the presence of module-info.java in my Spring Boot application, spring-orm throws an exception during start up time. This is the exception: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: javax/transaction/UserTransaction at spring.beans@5.0.8.RELEASE/org.springframework.beans.factory.support

I was reading this article on InfoQ quoting Reinhold: Developers can still use the Java class path in Java 9 for the Java runtime to search for classes and resource files. It's just that with Java 9's modules, developers no longer need the class path. So now my question is: what is the proper Java 9 way to do the tasks listed above? How do you dynamically load e.g. an image (short of fiddling with relative paths)? Even more interestingly, how would one check if a class is available and make a decision dynamically (e.g. check if Jackson is available and, if so, use it for JSON serialization and

Using IDEA-EAP for JDK9 development experiments. I am getting the following error - Error:(3, 20) java: package jdk.internal.misc is not visible (package jdk.internal.misc is declared in module java.base, which does not export it to module com.jigsaw.npe) The class definition is as - package experiment; import jdk.internal.misc.Unsafe; public class CompareAndSwap { static Unsafe UNSAFE = Unsafe.getUnsafe(); ... } I've tried including a module-info.java file as well inside the module created using the IDE with the following statements - module com.jigsaw.npe { requires java.base; } Directory