How to obtain the maximum Oracle date

How can I get the maximum Date of oracle in the development application? This article will provide such a method for obtaining information. For more information, see
SQL code
Copy codeThe Code is as follows:
-- Created on 2010/06/08 by NAN
Declare
-- Local variables here
TYPE t_test is table of date index by BINARY_INTEGER;
V_test t_test;
V_date DATE;
BEGIN
-- Test statements here
V_test (1): = '20140901 ';
V_test (2): = '20140901 ';
V_test (3): = '20140901 ';
FOR I IN 1 .. v_test.count LOOP
IF v_date IS NULL THEN
V_date: = v_test (1 );
End if;
IF v_date <v_test (I) THEN
V_date: = v_test (I );
End if;
End loop;
Dbms_output.put_line (v_date );
EXCEPTION
WHEN OTHERS THEN
Dbms_output.put_line (Sqlerrm );
End;