java - Why undefined class and/or applet with an Eclipse setup? -


i trying setup java project based on processing library , own classes. while simple project running, have troubles project running processing (core.jar) , custom classes.

my current setup in screenshot:

 src     |--- default.package     |   l--- sketch.java     |--- matrix     |   l--- custom.java, ...

project properties

  • you following wrong package structure. remove matrix folder , create package matrix in src.
  • now include processing-core.jar
  • then clean built , should work.

it may ask other dependant jars. whenever new project created advisable use maven because single dependency entry include dependant jar files required.


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