如何使用 <icon> 在Java Web应用程序的web.xml中？

Question

I'm create one maven web application. In web.xml there is one tag named is <icon> .

what is use case and how to use <icon> tag in my web application ?
please help me.

Web.xml :-

<?xml version="1.0" encoding="UTF-8"?><web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">

<icon>
    <small-icon>image/iconSmall.gif</small-icon>
</icon>

<!-- ************ Servlet Declaration *************** -->
<servlet>
    <servlet-name>MyFirstServlet</servlet-name>
    <servlet-class>com.example.servlet.MyFirstServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>MyFirstServlet</servlet-name>
    <url-pattern>/MyFirstServlet</url-pattern>
</servlet-mapping>

<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>index.html</welcome-file>
</welcome-file-list>

</web-app>    

Answer 1

icon element speicifes small and large image used to represent web application in GUI tool. size is 16x16 px and size is 32x32 pixel . File type should be .gif or .jpg

Ref : http://docs.oracle.com/cd/E11035_01/wls100/webapp/web_xml.html#wp1070143