I'm using IntelliJ IDEA's GUI designer and Maven as build system. When I build the executable JAR file via this answer, the build succeeds. However, it throws an exception when launched via the command java -jar MyApplication.jar:
Exception in thread "main" java.awt.IllegalComponentStateException: contentPane cannot be set to null.
at javax.swing.JRootPane.setContentPane(JRootPane.java:621)
at javax.swing.JFrame.setContentPane(JFrame.java:698)
...
The affected code line is the following:
setContentPane(panel);
When ran from source in IntelliJ, it works fine however Maven doesn't seem to properly build the JAR file. After all, IntelliJ does "magic" by linking to a .form file for keeping .java source code files clean from GUI code.
I also found a possible solution which involves adding a special plugin to the pom.xml file that seems to enable build support for IntelliJ's GUI designer here. So I ran mvn clean compile assembly:single again, it didn't have any errors however nothing changed.
If I do a mvn deploy, the plugin throws the following error:
[ERROR] Failed to execute goal org.codehaus.mojo:ideauidesigner-maven-plugin:1.0-beta-1:javac2 (default) on project MyApplication: Execution default of goal org.codehaus.mojo:ideauidesigner-maven-plugin:1.0-beta-1:javac2 failed: 16257 -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
Here is my pom.xml:
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>groupId</groupId>
<artifactId>MyApplication</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!-- Apache Commons Lang -->
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<!-- Jsoup HTML parser -->
<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.8.3</version>
</dependency>
<!-- Apache Commons IO -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<!-- Apache Commons Validator -->
<dependency>
<groupId>commons-validator</groupId>
<artifactId>commons-validator</artifactId>
<version>1.4.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>com.example.MyApplication
</mainClass>
</manifest>
<manifestEntries>
<Built-By>BullyWiiPlaza</Built-By>
</manifestEntries>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<!-- IDEA Gui Designer Plugin -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>ideauidesigner-maven-plugin</artifactId>
<version>1.0-beta-1</version>
<executions>
<execution>
<goals>
<goal>javac2</goal>
</goals>
</execution>
</executions>
<configuration>
<fork>true</fork>
<debug>true</debug>
<failOnError>true</failOnError>
</configuration>
</plugin>
</plugins>
</build>
</project>
What is wrong? How do I properly export an executable JAR file using Maven in combination with IntelliJ's GUI designer?
I had the same problem using IntelliJ IDEA 2017.1.5 but I was able to get it working with Maven. I created a GitHub repository with the updated plugin source code here.
First, clone the project.
In the ideauidesigner-maven-plugin-master folder, run the install-intellij-libs.sh script to install the IntelliJ libraries into your local maven repository:
./install-intellij-libs.sh <path to your IntelliJ directory>
Here is also a batch file (install-intellij-libs.bat) for Windows:
SET INTELLIJ_HOME=C:\Program Files\JetBrains\IntelliJ IDEA 173.3188.16 REM Edit this to match your path!
CALL mvn install:install-file -Dfile="%INTELLIJ_HOME%\lib\javac2.jar" -DgroupId=com.intellij -DartifactId=javac2 -Dversion=17.1.5 -Dpackaging=jar
CALL mvn install:install-file -Dfile="%INTELLIJ_HOME%\lib\asm-all.jar" -DgroupId=com.intellij -DartifactId=asm-all -Dversion=17.1.5 -Dpackaging=jar
CALL mvn install:install-file -Dfile="%INTELLIJ_HOME%\lib\forms_rt.jar" -DgroupId=com.intellij -DartifactId=forms_rt -Dversion=17.1.5 -Dpackaging=jar
Then install your new plugin by running the following:
mvn install
Now you're done with setting up your environment.
In your actual project, edit the plugin's version in your pom.xml to this:
<version>1.0-beta-2-17.1.5</version>
Also add the following dependencies:
<dependency>
<groupId>com.intellij</groupId>
<artifactId>javac2</artifactId>
<version>LATEST</version>
</dependency>
<dependency>
<groupId>com.intellij</groupId>
<artifactId>forms_rt</artifactId>
<version>LATEST</version>
</dependency>
<dependency>
<groupId>com.intellij</groupId>
<artifactId>asm-all</artifactId>
<version>LATEST</version>
</dependency>
Now building should work correctly with UI designer forms.