JAVA Installation for Oracle Database

For Java installation on oracle 11gR2 just run following scripts as sysdba:

sqlplus / as sysdba

@?/javavm/install/initjvm.sql;
@?/xdk/admin/initxml.sql;
@?/xdk/admin/xmlja.sql;
@?/rdbms/admin/catjava.sql;
@?/rdbms/admin/catexf.sql;