Unable to use apache commons ftp import

I've been trying to create my own FTP client written in Java. I wrote one ages ago in C#, so I would like to try in Java. I created a user library for apache commons and added it to my build path. The problem is that when typing the import statement it doesn't recognise it. It finds a error at org, saying "import org cannot be resolved".

import org.apache.commons.net.ftp.FTP; import org.apache.commons.net.ftp.FTPClient;

I am using eclipse as my IDE.

Here two screenshots showing the error:

enter image description here

Please show the added library in Project > Properties: Java Build Path, tab Libraries (instead of adding it as user library, you could have added it also directly as JAR or external library, but it should work either way).
– howlger
Aug 28 at 21:35

I have the JRE library and I added the apache-commons to my project library
– Governor Keagan
Aug 29 at 22:15

Please add a screenshot of that dialog to your question. I guess, there are errors in the Problems view. If there are build errors, please add also the error messages to your question.
– howlger
Aug 30 at 7:10

I can't post images yet. How do you want me to link the screenshots? (Which site?)
– Governor Keagan
Aug 31 at 0:09

You can copy the error message(s) as text. If you add a link to the screenshot, I will embed it as an image for you (I was not aware of this limitation).
– howlger
Aug 31 at 1:23

1 Answer
1

The following line is probably missing in the module-info.java file:

module-info.java

requires org.apache.commons.lang3;

and in the Java Build Path the Classpath contains the broken (as you can see from the red error mark) item apache-commons-lang by mistake: select it and click Remove.

apache-commons-lang

Since Java 9, modules can be specified, but this requires a correct module-info.java file and the libraries must be added to the Modulepath instead of to the Classpath. Without the module-info.java file it would be easier. Therefore, perhaps the simpler solution would be to delete module-info.java file.

module-info.java

In addition, the *-source.jar should be as Source attachment a child of the main JAR and the *-javadoc.jar is not needed with the source (but if, then as Javadoc location child of the main JAR).

*-source.jar

*-javadoc.jar

Hint: If an error or a warning is shown with a light bulb, go to the line and click Ctrl+1 and Eclipse will suggest solutions for that problem.

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