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I wanted just use org.apache.commons.math3.analysis.solvers.PegasusSolver; Created a Java project in Eclipse Oxygen.3A. Extended the build-path/classpath by commons-math3-3.6.1.jar. When typing the import statement until the dot after solvers, I expected to get a list of all the classes, among them PegasusSolver. But the list is empty.

Just typing PegasusSolver led a failure mark for that line.

I updated the classpath for 3.6 version instead of 3.6.1 of commons-math3 and everything worked as expected.

Switching back to 3.6.1 gave me the same strange behavior.

What could be the reason that 3.6 works with Eclipse, but 3.6.1?

An Apache failure? An Eclipse failure? A failure on my computer?

ngong
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  • Was there any exceptions or can you explain some of the behavior? It does sound odd. – Dale May 23 '18 at 03:30
  • Eclipse shows several compilation failures, e.g. not finding org.apache.commons.math3.analysis.UnivariateFunction. Just substituting 3.6.1 by 3.6 solves the issue. A screenshot of the good version (3.6) you may find here: https://pasteboard.co/HmzCPXL.png A screenshot of the failing verions (3.6.1) you may find here: https://pasteboard.co/HmzEord.png – ngong May 23 '18 at 23:09

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