How to check last checkpoints in the datafile headers

SQL> column file# format a10
SQL> column TO_CHAR format a60
SQL> column FILE_NAME format a30
SQL> set linesize 150
SQL> SELECT TO_CHAR(SYSDATE,'DD/MM/YYYY HH24:MI:SS') FROM dual;

TO_CHAR(SYSDATE,'DD

-------------------

05/02/2016 09:22:48

SQL> SELECT FILE# file_nr, TO_CHAR(CHECKPOINT_TIME,'DD/MM/YYYY HH24:MI:SS') checkpoint_time, NAME file_name
 FROM v$datafile_header;

   FILE_NR CHECKPOINT_TIME     FILE_NAME
---------- ------------------- ------------------------------------------------------------
         1 05/02/2016 09:22:19 /u01/app/oracle/oradata/prim/system01.dbf
         2 05/02/2016 09:22:19 /u01/app/oracle/oradata/prim/sysaux01.dbf
         3 05/02/2016 09:22:19 /u01/app/oracle/oradata/prim/undotbs01.dbf
         4 05/02/2016 09:22:19 /u01/app/oracle/oradata/prim/users01.dbf
         5 05/02/2016 09:22:19 /u01/app/oracle/oradata/prim/example01.dbf