. How can a servlet refresh automatically if some new data has entered the database?

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You can use a client-side Refresh or Server Push.

2013-07-11, 7326👍, 0💬

Is JSP technology extensible?
Is JSP technology extensible? YES. JSP technology is extensible through the development of custom actions, or tags, which are encapsulated in tag libraries. 2019-01-07, 4110👍, 1💬

💬 2019-01-07 Hgf: Very good

How many JSP scripting elements and what are they?
How many JSP scripting elements and what are they? There are three scripting language elements: --declarations --scriptlets --expressions 2016-06-25, 3943👍, 1💬

💬 2016-06-25 saidesh: Jsp scripting elements are three types: Declaration, Expression, Scriptlet.

Why are JSP pages the preferred API for creating a web-based client program?
Why are JSP pages the preferred API for creating a web-based client program? Because no plug-ins or security policy files are needed on the client systems(applet does). Also, JSP pages enable cleaner and more module application design because they provide a way to separate applications programming f... 2013-07-09, 2727👍, 0💬

Can we use the constructor, instead of init(), to initialize servlet?
Can we use the constructor, instead of init(), to initialize servlet? Yes , of course you can use the constructor instead of init(). Thereâ€™s nothing to stop you. But you shouldnâ€™t. The original reason for init() was that ancient versions of Java couldnâ€™t dynamically invoke constructors wit... 2013-07-10, 2026👍, 0💬

The code in a finally clause will never fail to execute, right?
The code in a finally clause will never fail to execute, right? Using System.exit(1); in try block will not allow finally code to execute. 2013-07-11, 1969👍, 0💬

What are the implicit objects?
What are the implicit objects? Implicit objects are objects that are created by the web container and contain information related to a particular request, page, or application. They are: --request --response --pageContext --session --application --out --config --page --exception 2013-07-08, 1955👍, 0💬

What information is needed to create a TCP Socket?
What information is needed to create a TCP Socket? The Local Systems IP Address and Port Number. And the Remote Systemâ€™s IPAddress and Port Number. 2013-07-12, 1872👍, 0💬

What Class.forName will do while loading drivers?
What Class.forName will do while loading drivers? It is used to create an instance of a driver and register it with the DriverManager. When you have loaded a driver, it is available for making a connection with a DBMS. 2013-07-15, 1830👍, 0💬

How to Retrieve Warnings?
How to Retrieve Warnings? SQLWarning objects are a subclass of SQLException that deal with database access warnings. Warnings do not stop the execution of an application, as exceptions do; they simply alert the user that something did not happen as planned. A warning can be reported on a Connection ... 2013-07-15, 1820👍, 0💬

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