A type with member function:

SQL> CREATE TYPE t_emp AS OBJECT (
  2      id INTEGER,
  3      name VARCHAR2(15),
  4      description VARCHAR2(22),
  5      sal NUMBER(5, 2),
  6      hiredate DATE,
  7      MEMBER FUNCTION get_hire_date RETURN DATE
  8  );
  9  /

Type created.

SQL>
SQL> CREATE TYPE BODY t_emp AS
  2     MEMBER FUNCTION get_hire_date RETURN DATE IS
  3        v_date DATE;
  4     BEGIN
  5        SELECT hiredate INTO v_date FROM dual;
  6        RETURN v_date;
  7     END;
  8  END;
  9  /

Type body created.

SQL>

CREATE PUBLIC SYNONYM t_pub_emp FOR t_emp;