In this section you will learn how to change the degrees into radians using java servlet.
Java Servlet Degrees to Radians
In this section you will learn how to change the degrees into radians using java servlet.
Here I am giving a simple example which will demonstrate you how to convert the degrees into radians. In Mathematics like the radian (SI unit), degree is not a SI unit it is only an accepted unit in SI brochure to measure the plane angle, In terms of radian 1 degree is equivalent to Π⁄180.
Now, since I have to use this function in java servlet program, therefore I have created a java servlet class named DegreeToRadianServlet which extends the HttpServlet class. In the body of class I overridden the method doGet() and created an objects of HttpServletRequest and HttpServletResponse into its parameter. Inside the doGet() method first I set the mime type that in which format the browser will show the output. In the next line I used the getWriter() method of ServletResponse interface with the object of HttpServletResponse. HttpServletResponse interface extends this method from the ServletResponse. In Next step I am taking input using the getParameter() method of ServletRequest with the object of HttpServletRequest. And create a method for calculating to change the degree into radian.
Example :
degreeToRadian.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>DegreeToRadian</title> </head> <body> <form method="get" action="DegreeToRadianServlet"> <table> <tr><td>Enter value in degree </td><td><input type="text" name="text1"/></td></tr> <tr><td></td><td><input type="submit" value="ok"/></td></tr> </table> </form> </body> </html>
DegreeToRadianServlet.java
package simpleServletExample;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class DegreeToRadianServlet extends HttpServlet
{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
double deg = Double.parseDouble(request.getParameter("text1"));
out.println(radian(deg));
}
public double radian(double deg)
{
deg = (deg*(Math.PI/180));
return deg;
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>servletBasicExample</display-name> <servlet> <servlet-name>DegreeToRadianServlet</servlet-name> <servlet-class>simpleServletExample.DegreeToRadianServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>DegreeToRadianServlet</servlet-name> <url-pattern>/DegreeToRadianServlet</url-pattern> </servlet-mapping> </web-app>
Output :
When you will execute the above example you will get the output as :
When you will give the value in text box like as :
You will get the output after clicking on 'ok' button as :
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