When using the command:
java -jar C:\Downloads\plantuml\plantuml_last\plantuml.jar french.pu -charset UTF-8
the diagram is rendered properly.
When using an unknown charset plantuml crashes, e.g.:
java -jar C:\Downloads\plantuml\plantuml_last\plantuml.jar french.pu -charset UTF
crashes with:
java.io.UnsupportedEncodingException: UTF
at sun.nio.cs.StreamDecoder.forInputStreamReader(Unknown Source)
at java.io.InputStreamReader.<init>(Unknown Source)
at net.sourceforge.plantuml.SourceFileReaderAbstract.getReader(SourceFileReaderAbstract.java:91)
at net.sourceforge.plantuml.SourceFileReader.<init>(SourceFileReader.java:86)
at net.sourceforge.plantuml.Run.manageFileInternal(Run.java:482)
at net.sourceforge.plantuml.Run.processArgs(Run.java:404)
at net.sourceforge.plantuml.Run.manageAllFiles(Run.java:372)
at net.sourceforge.plantuml.Run.main(Run.java:188)
No diagram found