Java 2 security policy file example 3
/* Grants permission to run and access a single */
/* database (salesdb) under the system home */
/* Note .system.home must be an absolute pathname */
grant codeBase "file://f://lib/derby.jar" {
permission java.lang.RuntimePermission "createClassLoader";
permission java.util.PropertyPermission "derby.*", "read";
permission java.io.FilePermission "${derby.system.home}","read";
permission java.io.FilePermission "${derby.system.home}${/}*",
"read,write,delete";
permission java.io.FilePermission "${derby.system.home}${/}
salesdb${/}-", "read,write,delete";
permission java.util.PropertyPermission "derby.storage.jvmInstanceId",
"write";
};