uso il run di eclipse e visualizzo il tutto nella finestra console di eclipse. in debug mi dà questo errore:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
BoxPeso cannot be resolved to a type
BoxPeso cannot be resolved to a type
Box cannot be resolved to a type
Box cannot be resolved to a type
Box cannot be resolved to a type
Box cannot be resolved to a type
Box cannot be resolved to a type
Box cannot be resolved to a type
Box cannot be resolved to a type
Box cannot be resolved to a type


at BoxDemoE.main.boxE.main(boxE.java:74)