在Java Application中使用安全数据库

I am trying to develop a Java Application to store my login IDs and passwords for various sites.. I want to create a database inside the application itself that will not be accessible by others.. If I use MS-Access or MYSQL .. anyone will be able to alter the database.. I mean that the file should not be visible to anyone as a database and there should not be a way of accessing the database from outside the application.. Please help me with this.I am trying to develop a Java Application to st