SQL & PL/SQL :: User Defined Data Types In Cast Functions

I am migrating sybase to oracle database. A Java developer needs money datatypes.I said to them, please change the cast(<value> as number(19,4) in java code side. but they are not accepted because money data type is used most of the places.

select cast(0 as money) from bank_trans; this sql statements present in java code. I need to create user defined type is equivalent to money datatype.

My steps

I have create user defined data types

create or replace type money as object(money as numbeer(19,4)

select cast(0 as money) from dual;

it shows inconsistent datatypes error.

create or replace type money is table of numbeer(19,4);

select cast(0 as money) from dual;

it shows inconsistent datatypes error.