Java 2 security policy file example 1

/* Grants permission to run Derby and access all      */
/* databases under the Derby system home              */
/* when it is specified by the system property             */
/* Derby.system.home                                        */

/* Note Derby.system.home must be an absolute pathname */

grant codeBase "file://f:/derby/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.util.PropertyPermission "derby.storage.jvmInstanceId", 
     "write"; 
};