GNU Classpath Math has JNI implementations for these functions, but the libgcj Math.java override doesn't implement these.
-- Summary: Math cbrt(), cosh(), expm1(), hypot(), log1p(), sinh() and tanh() not implemented Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libgcj AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: mark at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27731