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A java servlet is the heart of a Java Enterprise web application. It contains most of the business logic that the web application needs. The initial web application technologies did not have capabilities to support dynamic contents in a secure and efficient way. Java Servlets were created to address this drawback. Servlets are used in many types of Java EE applications using technologies like Struts, MVC etc.
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What is the use of Servlet in java?
Java Servlet is used for Server Side programming for developing Web Applications. It easily employs Database Connectivity. We can also use JSP however it cannot replace a Java Servlet.
Differentiate Java applet and Java servlet?
Java Applet is an application designed to transmit on internet to execute on java compatible browsers. Java Servlet is a server side program used to provide services to clients.
What is the difference between networking and servlet in java?
Networking is a basic action. A servlet in Java is a single part of networking, a single task.
Can you use constructor in servlet?
Yes you can but it is not required. A Servlet is nothing but another .java file and all rules that are applicable to standard Java classes are applicable to them. Note: Even if you write a constructor in a servlet, it will not get executed.
Can insert javascript coding in servlet?
No. Javascript code can be present inside a JSP but not inside a servlet. A Servlet is a pure java class.
How do you compile servlet in java using tomcat?
Tomcat is a server. It is used to deploy and run Servlets and not compile them. A Servlet is a java file and has to be compiled just like any other Java Class.
How do you give connection between HTML and java servlet?
You cannot. HTML is a static file and it cannot interact with a Java Servlet. A Servlet can always redirect to a HTML page but the other way round cannot happen.
What is JAVA Servlet Development Kit?
Java Servlet Development Kit is an integrated development kit used to build, test, and deploy Java Servlet applications. JSDK allows most standard Web server such as Netscape servers, IIS, Apache and others to load servlets . JSDK is a suite of software for easing the development of Java servlets.
What are Perl PHP and Java Servlet's?
Perl, php and Java are all examples of programming languages.
Why servlet has no constructor?
Because it is not a regular Java Class that is executed by a JVM. It is a special Java class that is executed by the Web Container which initializes and loads the servlet and the service methods get executed everytime it receives a request.
How easily does servlet integrate into an existing Java application or applet?
(This is a bit subjective). Servlets can integrate easily into an existing Java application or applet, simply because a servlet is just another class, which is a fundamental concept taught to almost every java programmer.
What is java servlet chaining?
Servlet Chaining means the output of one servlet act as a input to another servlet. Servlet Aliasing allows us to invoke more than one servlet in sequence when the URL is opened with a common servlet alias. The output from first Servlet is sent as input to other Servlet and so on. The Output from the last Servlet is sent back to the browser. The entire process is called Servlet Chaining.
Can all server understand servlet?
No. It must be a Web Server that has Java Installed in it
How do you call servlet from java script?
You can do this if:The Java Script code is present inside a JSP pageThe JSP page is part of a J2EE applicationBy submitting the HTML Form the control would go back to the Servlet.
Does servlet come under core java?
Core java comes with J2SE specification Web and distributed enterprise applications in java comes with J2EE specification
Differniate between applet and servlet in java?
Applet: It is run on browser, i mean client side. Servlet: It is run on server, i mean server side.
What are the applications of servlets?
Servlet is a Server side component, a servlet is a small pluggable extension to the server and servlets are used to extend the functionality of the java enabled server.
What is javax servlet?
A Servlet is a Java programming language class used to extend the capabilities of a server. Although servlets can respond to any types of requests, they are commonly used to extend the applications hosted by web serversA Servlet is a Java-based server-side web technology.The javax.servlet package contains a number of classes and interfaces that describe and define the contracts between a servlet class and the runtime environment provided for an instance of such a class by a conforming servlet container.
What is the difference between requestgetattribute and requestgetParameter in JSP?
request.getAttribute() is used on the Server side Java code to get values submitted from the form onto the Servlet or other java classes request.getParameter() is used on the JSP page to get values sent by the servlet and display it in the jsp page
How do you compile java servlet?
The Java Servlet is like every other Java class. You can compile it using the javac command or if you are using a Integrated Development Environment (IDE) like Eclipse, it will compile the class for you. One main difference w.r.t Servlets is the fact that, they get deployed into EAR files (Enterprise Archive Files) and not JAR files (Java Archive Files) like normal java apps.
