iText RUPS is a tool to view PDF structure in a Swing GUI.
iText Rups is built into a Jar file which is then run by Java. To build iText Rups with Maven, run the following command:
mvn clean package
The resultant Jar file with dependencies will be located in the target directory.
To run RUPS, simply type
java -jar itext-rups-x.y.z-SNAPSHOT.jar
If you are a Windows user, there is a possibility to create a RUPS executable (exe file). It still requires Java Runtime Environment to run, but you will not need to type the command anymore each time.
To build an executable, run the following command:
mvn clean package -P exe
This should produce Rups.exe in your target folder which you can run as any other executable assuming you have Java installed on your system.
Similar to Windows executable, there is a possibility to create a RUPS application bundle (.app application) for macOS. Again, it requires Java Runtime Environment to run. Mind that in order to build it one requires Java version prior to 10, additionally proper application bundle can only be built on macOS.
To create application bundle, run the following command:
mvn clean package -P mac
This will produce itext-rups.app in your target folder (in itext-rups-{project.version} subfolder). You can copy it to your 'Applications' folder and run it as any other application assuming you have Java installed on your system. Maven 'appbundle' should handle executable file permissions automatically, but you can always give the rights manually like this: chmod +x /Applications/itext-rups.app/Contents/MacOS/*.