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1)How can you push data from an Applet to Servlet ? By using the java.net packages to create a direct network connection; or by invoking a remote method using Java's remote method invocation (RMI) interface or by using CORBA. 2)Where the CardLayout is used ? CardLayout manages two or more components that share the same display space. It lets you use one container (usually a panel) to display one out of many possible component children (like flipping cards on a table). A program can use this layout to show a different child component to different users. For example, the interface shown to an administrator might have additional functionality from the interface shown to a regular user. With card layout, our program can show the appropriate interface depending on the type of user using the program. Another typical use of card layout would be to let end user toggle among different displays and choose the one they prefer. In this case, the program must provide a GUI for the user to make the selection. 3)Difference between Application and Applet The difference between an application and an applet, is that an applet is used in a browser, and an application, in a stand alone mode. A Java applet is made up of at least one public class that has to be subclassed from java.awt.Applet. The applet is confined to living in the user's Web browser, and the browser's security rules, (or Sun's appletviewer, which has fewer restrictions). In an application, if you want to "show" something, you have to declare one or more panel, and add your stuff in it. In an applet, you only add your stuff directly into your applet. (Well, because an applet is just a kind of panel 8). A Java application is made up of a main() method declared as public static void that accepts a string array argument, along with any other classes that main() calls. It lives in the environment that the host OS provides. 4)Name the containers which uses Border Layout as their default layout? Containers which uses Border Layout as their default are: window, Frame and Dialog classes. |
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