怎么解决？
Exception in thread "main" java.lang.NoClassDefFoundError: vtk/vtkMapper
at vtk.main(vtk.java:5)
Caused by: java.lang.ClassNotFoundException: vtk.vtkMapper
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
... 1 more
怎么解决，类找不到。包导入方式没对吧。
Caused by: java.lang.ClassNotFoundException: vtk.vtkMapper