Package 'com.example' reads package 'javafx.beans' from both 'javafx.base' and 'javafx.base' -- how to solve?

Question

I try to add some class of java RMI that works fine in separate project. When i added the classes to my java fx project , i have got this error:

Package 'com.example' reads package 'javafx.beans' from both 'javafx.base' and 'javafx.base'

this is my pom.xml:enter image description here

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>FXtest</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>FXtest</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <junit.version>5.8.1</junit.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>17.0.1</version>

        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-fxml</artifactId>
            <version>17.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-web</artifactId>
            <version>17.0.1</version>
        </dependency>

  <dependency>
            <groupId>org.controlsfx</groupId>
            <artifactId>controlsfx</artifactId>
            <version>11.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.dlsc.formsfx</groupId>
            <artifactId>formsfx-core</artifactId>
            <version>11.3.2</version>
            <exclusions>
                <exclusion>
                    <groupId>org.openjfx</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>net.synedra</groupId>
            <artifactId>validatorfx</artifactId>
            <version>0.1.13</version>
            <exclusions>
                <exclusion>
                    <groupId>org.openjfx</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.kordamp.ikonli</groupId>
            <artifactId>ikonli-javafx</artifactId>
            <version>12.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.kordamp.bootstrapfx</groupId>
            <artifactId>bootstrapfx-core</artifactId>
            <version>0.4.0</version>
        </dependency>
        <dependency>
            <groupId>eu.hansolo</groupId>
            <artifactId>tilesfx</artifactId>
            <version>11.48</version>
            <exclusions>
                <exclusion>
                    <groupId>org.openjfx</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>17</source>
                    <target>17</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.openjfx</groupId>
                <artifactId>javafx-maven-plugin</artifactId>
                <version>0.0.8</version>
                <executions>
                    <execution>
                        <!-- Default configuration for running with: mvn clean javafx:run -->
                        <id>default-cli</id>
                        <configuration>
                            <mainClass>com.example.fxtest/com.example.fxtest.HelloApplication</mainClass>
                            <launcher>app</launcher>
                            <jlinkZipName>app</jlinkZipName>
                            <jlinkImageName>app</jlinkImageName>
                            <noManPages>true</noManPages>
                            <stripDebug>true</stripDebug>
                            <noHeaderFiles>true</noHeaderFiles>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

this is the console error i get when i run my rmi-server:

Exception in thread "main" java.lang.reflect.InaccessibleObjectException: Unable to make public abstract void com.example.fxtest.shared.CardgameServer.toUpperCase(java.lang.String,com.example.fxtest.shared.CardgameClient) throws java.rmi.RemoteException accessible: module com.example.fxtest does not "exports com.example.fxtest.shared" to module java.rmi
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
    at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
    at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)
    at java.rmi/sun.rmi.server.UnicastServerRef$HashToMethod_Maps$1.run(UnicastServerRef.java:598)
    at java.rmi/sun.rmi.server.UnicastServerRef$HashToMethod_Maps$1.run(UnicastServerRef.java:596)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
    at java.rmi/sun.rmi.server.UnicastServerRef$HashToMethod_Maps.computeValue(UnicastServerRef.java:595)
    at java.rmi/sun.rmi.server.UnicastServerRef$HashToMethod_Maps.computeValue(UnicastServerRef.java:574)
    at java.rmi/sun.rmi.server.WeakClassHashMap.get(WeakClassHashMap.java:74)
    at java.rmi/sun.rmi.server.UnicastServerRef.exportObject(UnicastServerRef.java:236)
    at java.rmi/java.rmi.server.UnicastRemoteObject.exportObject(UnicastRemoteObject.java:475)
    at java.rmi/java.rmi.server.UnicastRemoteObject.exportObject(UnicastRemoteObject.java:360)
    at com.example.fxtest/com.example.fxtest.server.ServerImpl.<init>(ServerImpl.java:13)
    at com.example.fxtest/com.example.fxtest.server.RunServer.main(RunServer.java:15)

i addad a photo of my module-info.java where the error is found.

any adivce will be appreciated! thanks

Do you actually use and need all those libraries? If not get rid of the ones you don’t use. — jewelsea, Jun 05 '22 at 04:40
Why is the error in your stack trace completely different than the one in your question title? — jewelsea, Jun 05 '22 at 04:42
Instead of a screen shot of the `module-info.java`, put the text in the question formatted as code. — jewelsea, Jun 05 '22 at 04:48
Run a [version check](https://gist.github.com/trashgod/c3e0fa8480b11f93b9ab08e597a45a5a), provide the output in the question. — jewelsea, Jun 05 '22 at 04:52
“When i added the classes to my java fx project” -> how did you do this? and do the added classes include JavaFX classes? — jewelsea, Jun 05 '22 at 04:57
i try : exports com.example.fxtest.shared to java.rmi; and its seem to be work now thanks! — Gal Lisha, Jun 05 '22 at 14:05

score 1 · Answer 1 · answered Jun 06 '22 at 19:52

To address the issue reported in the exception trace in the question body:

java.rmi.RemoteException accessible: module com.example.fxtest does not "exports com.example.fxtest.shared" to module java.rmi

you need to do what the message says.

Add to the module-info.java:

exports com.example.fxtest.shared to java.rmi;

Package 'com.example' reads package 'javafx.beans' from both 'javafx.base' and 'javafx.base' -- how to solve?

2 Answers2