Arcobjects sdk for java 提供的sample（ConvertShapeToString）执行报错

ShapefileWorkspaceFactory shapefileWorkspaceFactory = new ShapefileWorkspaceFactory();

            Workspace workspace = new Workspace(shapefileWorkspaceFactory.openFromFile(workspacePath, 0));

            FeatureClass featureClass = new FeatureClass(workspace.openFeatureClass(featureClassName));