The %maven line magic code throws an error. I guess it is due to my proxy settings. It seems as if the resolver does not take into account the proxy settings? Is there a way to give the resolver a proxy configuration?

Command:
%maven org.knowm.xchart:xchart:3.5.2
or
%maven org.apache.commons:commons-math3:3.6.1

Result:

java.lang.RuntimeException: Exception occurred while running line magic 'maven': Unable to collect/resolve dependency tree for a resolution due to: Failed to collect dependencies at org.knowm.xchart:xchart:jar:3.5.2, caused by: Connection refused: connect
at .lineMagic(#9:10)
at .(#76:1)

I tried:
System.setProperty("http.proxyHost", proxyHost);
System.setProperty("https.proxyHost", proxyHost);
System.setProperty("http.proxyPort", proxyPort);
System.setProperty("https.proxyPort", proxyPort);

With this I can successfully make network communications, i.e. the proxy configuration works. E.g.:
URL url = new URL("http://www.example.org/");
InputStream in = url.openStream();
The above code works. However the maven resolution still fails.