Why do I get systemtables from Oracle?

Hello!

I'm playing around with some code that retrive metedata from an oracle.

I have created a tablespace and a user like:
DROP TABLESPACE testing INCLUDING CONTENTS AND DATAFILES;
CREATE TABLESPACE testing
  LOGGING
  DATAFILE 'C:\testing.DBF'
  SIZE 32M
  AUTOEXTEND ON
  NEXT 32M MAXSIZE 2048M
  EXTENT MANAGEMENT LOCAL;


CREATE USER testing_user IDENTIFIED BY testing_password DEFAULT TABLESPACE testing;

GRANT CREATE SESSION TO testing_user;
GRANT CREATE SEQUENCE TO testing_user;
GRANT CREATE PROCEDURE TO testing_user;
GRANT CREATE TABLE TO testing_user;
GRANT CREATE VIEW TO testing_user;
GRANT UNLIMITED TABLESPACE TO testing_user;

In this database I got a table like:

DROP TABLE Countries CASCADE CONSTRAINTS;
CREATE TABLE Countries
(
    id INT NOT NULL,
    name VARCHAR(255) NOT NULL,
    PRIMARY KEY (id)
) TABLESPACE testing;

When I try to fetch the tables like:
  String[] types = {"TABLE"};
  ResultSet resultSet = databaseMetaData.getTables(null, null, "%", types);

  ArrayList<String> tableList = new ArrayList<String>();
    while( resultSet.next() )
    {
        String tableName = resultSet.getString(3);
        System.out.println(tableName);
}

I get the table Countries but I also get tables like:
SDO_COORD_AXES

I guess my user got to much privileges?

How to set him so he only get to see tables I create?

Best regards
Fredrik