Tag: architecture

Use the setXXX() method defined for the wrapper class.

Use the parseXXX() method defined for the wrapper class.

Use the equals() method defined for the wrapper class.

The value encapsulated by a wrapper class is immutable.

Collection

List

Set

Map

Call System.gc()

Garbage collection cannot be forced.

Call System.gc(), passing in a reference to the object to be garbage-collected.

Call Runtime.gc()

Statement

PreparedStatement

ResultSet.

Callable Statement

get(1);

get(2);

get(“Chance”);

None of the above.

String [] strArr = [“element 1”, “element 2];

String [] strArr = {“element 1”, “element 2”};

String [] strArr = (“element 1”, “element2”);

String [] strArr = new String [“element 1” , “element 2”];

JSP, Servlets.

JSP, Servlets, EJBs

Applets, EJBs

No need to change it.

The EJB tier hosts the application-specific business objects.

The EJB tier does not host system-level services (such as transaction management, concurrency control and security); they are hosted on the EIS tier.

The EJB tier is a link between the web tier and the EIS integration tier.

The EJB tier hosts the entity beans and session beans, data access objects and value objects and perhaps master-detail modeling using enterprise beans.

getIdentity()

getCallerPrincipal()

getCallerIdentity()

getUserId()

Containers run within servers.

Servers run within containers.

Only one server can run in a container.

Only one container can run in a server.