returns a string representation of the edge . by default , the format is : fromvertex.tostring + '' - > '' + tovertex.tostring concode_field_sep String str concode_elem_sep Vertex vertexA concode_elem_sep Vertex vertexB concode_field_sep void setString concode_elem_sep Vertex getVertexA concode_elem_sep Vertex getOppositeVertex concode_elem_sep Object clone concode_elem_sep Vertex getVertexB
String function ( ) { return this . str ; }