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Articles by Samual Sam
Page 144 of 151
How to setup a Web server like Tomcat to test JSP pages?
Apache Tomcat is an open source software implementation of the JavaServer Pages and Servlet technologies and can act as a standalone server for testing JSP and Servlets, and can be integrated with the Apache Web Server. Here are the steps to set up Tomcat on your machine −Download the latest version of Tomcat from https://tomcat.apache.org/.Once you downloaded the installation, unpack the binary distribution into a convenient location. For example, in C:\apache-tomcat-5.5.29 on windows, or /usr/local/apache-tomcat-5.5.29 on Linux/Unix and create CATALINA_HOME environment variable pointing to these locations.Tomcat can be started by executing the following commands on the Windows machine −%CATALINA_HOME%\bin\startup.bat ...
Read MoreCreate a column on my table that allows null but is set by default to empty (not null)?
You need to use default keyword for this. The syntax is as follows −alter table yourTableName add yourColumnName yourDataType NULL Default '';To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table AllowNullDefaulNotNullDemo -> ( -> Id int NOT NULL AUTO_INCREMENT, -> UserName varchar(20), -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.65 sec)Let us add a new column that allow NULL value but default value set to NOT NULL. The query is as follows −mysql> alter table AllowNullDefaulNotNullDemo add UserAddress varchar(20) ...
Read MoreIterate through Quartet class in JavaTuples
You can also iterate through Quartet class like Arrays using a loop.Let us first see what we need to work with JavaTuples. To work with Quartet class in JavaTuples, you need to import the following package −import org.javatuples.Quartet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Quartet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport org.javatuples.Quartet; public class Demo { public static void main(String[] args) { ...
Read MoreWhat are JSP declarations? In how many ways we can write JSP declarations?
A declaration declares one or more variables or methods that you can use in Java code later in the JSP file. You must declare the variable or method before you use it in the JSP file.Following is the syntax for JSP Declarations −You can write the XML equivalent of the above syntax as follows − code fragment Following is an example for JSP Declarations −
Read MoreCreate Quintet Tuple in Java using with() method
The with() method is used in Java to create Quintet Tuple.Let us first see what we need to work with JavaTuples. To work with Quintet class in JavaTuples, you need to import the following package −import org.javatuples.Quintet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Quintet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport org.javatuples.Quintet; public class Demo { public static void main(String[] args) { ...
Read MoreJavaTuples setAt1 () method for Quartet class
The setAt1() method is used to set the Quartet value in JavaTuples and a copy with new value at the specified index i.e. index 1 here.Let us first see what we need to work with JavaTuples. To work with Quartet class in JavaTuples, you need to import the following package −import org.javatuples.Quartet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Quartet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport org.javatuples.Quartet; public ...
Read MoreI want to use <% literal in JSP page. But it is throwing error. How to escape this syntax in JSP?
You can escape it using backslash character. Replace
Read MoreHow to use resource bundle in JSP?
The tag will make the specified bundle available to all tags that occur between the bounding and tags. With this, you need not specify the resource bundle for each of your tags.For example, the following two blocks will produce the same output − AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultbasenameSpecifies the base name of the resource bundle that is to be loaded.YesNonePrefixValue to prepend to each key name in subtagsNoNoneExampleResource bundles contain locale-specific objects. Resource bundles contain key/value pairs. When your program ...
Read MoreHow to hide the status bar in a iOS App using Swift?
Sometimes in our application, we need to hide the status bar, navigation bar, and other things and only show the content we want to display. In this article, we’ll see how to hide the status bar in our application. To hide status bar in our iOS application using swift language we need to go through very basic steps.We can hide the status bar in two general ways. Both of these methods involve a common step.Common StepGo to Your info.plist file.Add a key called “View controller-based status bar appearance” and set its value to NO.This was a common step we’ll use ...
Read MoreAdding Navigation Bar programmatically iOS using Swift
To add navigation bar programmatically we’ll go through a series of steps that are mentioned below. We’ll be doing this in ViewWillLayoutSubviews method of our viewController.Getting the width of the current View.let width = self.view.frame.widthCreating a navigation bar with the width of our current view and height of 44 px which is the default height of a navigation bar.let navigationBar: UINavigationBar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: width, height: 44))Adding the newly created navigation bar to our view.self.view.addSubview(navigationBar)We can further extend this example to add a title and a button to our View. The complete result should look something ...
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