Java EE Tutorials Servlets Tutorials Servlets Interview Questions The Servlet API is supported by all Servlet containers, such as Tomcat and Weblogic, etc. The Application Programming Interface (API) contains interface and classes to write a servlet program. The servlet API contains two packages as listed below: javax.servlet javax.servlet.http Package javax.servlet javax.servlet contains a number of …
Introduction to Servlet
Java EE Tutorials Servlets Tutorials Servlets Interview Questions What is Servlet ? Servlets are an important component of a J2EE application. Servlets along with JavaServer Pages (JSP) and EJB modules can be termed as server-side J2EE component types. Servlet is a Java Programming Language. Servlets are used to create web applications. Servlets are used to …
How To Run External Application From Java
If you are working on system programming in Java, it is very common to run the processes for starting some external applications. Runtime class defines a method to execute the external applications. This example shows how to open another eclipse instance from the Java program. This example opens the eclipse IDE, and the closes the …
How To Write Properties To XML File In Java
In my previous tutorial I have written a sample program to write properties to a properties file. This example is writing the properties object values to a XML file. Here we are using the storeToXML method instead of just store method. This method will create the XML file with the content in the properties object. Lets look at …
How To Get Java System Properties Values
Java’s System class maintains a property object which contains the various details of the current user, Java version, operating system, etc. These are predefined values and can be easily accessed by calling the System class level methods. This utility is very useful to get the native operating system details. Lets look at the below example …
How To Get IP Address In Java
This is simple example to demonstrate the use of InetAddress.getLocalHost() API to retrieve the IP Address details of your local system or where ever the Java program is executed. If you write a server applications, this can be used for getting the server’s IP Address. Lets look at the example code to display the IP Address …
How To Get Free Disk Space In Java (Windows)
This simple Java program helps you to get the free disk space on your windows machines. Here I have used three methods for getting the disk space from your system. getTotalSpace() getUsableSpace() getFreeSpace() The above methods are introduced from Java 6.0 and as part of the java.io package. The below example prints the disk space …
How To Test Internet Connection Using Java
It is very often required to test the internet connection for performing some operations. If there is no internet connection established, then alternative logic will be executed. Java provides useful classes in java.net package for connecting to the internet. Here I written a very simple example to test if your system is connected to internet. …