After writing the Java classes, use the loadjava tool to upload your Java stored procedures into Oracle Database, as follows:

> loadjava -u HR@myPC:1521:orcl -v -r -t POManager.java
Password: password
initialization complete
loading : POManager
creating : POManager
resolver : resolver ( ("*" HR) ("*" public) ("*" -) )
resolving: POManager

The -v option enables the verbose mode, the -r option compiles uploaded Java source files and resolves external references in the classes, and the -t option tells the loadjava tool to connect to the database using the client-side JDBC Thin driver.