ASA Programming Guide
  Using Java in the Database
    Java-enabling a database

The Adaptive Server Anywhere runtime Java classes

The Adaptive Server Anywhere runtime Java classes are held on disk rather than stored in a database like other classes. The following files contain the Adaptive Server Anywhere runtime Java classes. The files are in the Java subdirectory of your SQL Anywhere directory:

• 1.1\classes.zip    This file, licensed from Sun Microsystems, contains a subset of the Sun Microsystems Java runtime classes for JDK 1.1.8.

• 1.3\rt.jar    This file, licensed from Sun Microsystems, contains a subset of the Sun Microsystems Java runtime classes for JDK 1.3.

• asajdbc.zip    This file contains Adaptive Server Anywhere internal JDBC driver classes for JDK 1.1.

• asajrt12.zip    This file contains Adaptive Server Anywhere internal JDBC driver classes for JDK 1.2 and JDK 1.3.

When you Java-enable a database, you also update the system tables with a list of available classes from the system JAR files. You can then browse the class hierarchy from Sybase Central, but the classes themselves are not present in the database.

JAR files 

The database stores runtime class names the under the following JAR files:

• ASACIS    Classes required for remote data access are stored here.

• ASAJDBCDRV    Class names from jdbcdrv.zip are held here. (com.sybase.jdbc package).

• ASAJIO    

• ASAJRT    Class names from asajdbc.zip are held here.

• ASASystem    Class names from classes.zip are held here.

• ASASystemUNIX    Class names from classes.zip are held here.

Installed packages 

These runtime classes include the following packages:

• java    Packages stored here include the supported Java runtime classes from Sun Microsystems.

• com.sybase    Packages stored here provide server-side JDBC support.

• sun    Sun Microsystems provides the packages stored here.

• sybase.sql    Packages stored here are part of the server-side JDBC support.

Caution: do not install classes from another version of Sun's JDK    Classes in Sun's JDK share names with the Adaptive Server Anywhere runtime Java classes that must be installed in any database intended to execute Java operations. You must not replace the classes.zip file included with Adaptive Server Anywhere. Using another version of these classes could cause compatibility problems with the Adaptive Server Anywhere Java Virtual Machine. You must only Java-enable a database using the methods outlined in this section.