Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_225198_3 (state__class_ VARCHAR, vacator VARCHAR)

### Question ###
Name the state class for isaac d. barnard (j)

### Accurate SQL ###

SELECT state__class_ FROM table_225198_3 WHERE vacator = "Isaac D. Barnard (J)"