Calc.html
<html><head>
</head>
<body>
<form method="get" action="calc3">
<h3>Enter First Number:<input type="text" name="fnum"></h3><br>
<h3>Enter Second Number:<input type="text" name="snum"></h3><br>
<h3> Select any one operation:
<input type="submit" value="+" name="btnop">
<input type="submit" value="-" name="btnop">
<input type="submit" value="*" name="btnop">
<input type="submit" value="/" name="btnop">
</h3><br>
</form>
</body>
</html>
calcservlet.java
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class calcservlet extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException,ServletException{
response.setContentType("text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
int a=Integer.parseInt(request.getParameter("fnum"));
int b=Integer.parseInt(request.getParameter("snum"));
String s1=request.getParameter("btnop");
int c=0;
if (s1.equals("+")) {
c=a+b;
out.println("<h1>"+"Result="+c+"</h1>");
}
if (s1.equals("-")) {
c=a-b;
out.println("<h1>"+"Result="+c+"</h1>");
}
if (s1.equals("*")) {
c=a*b;
out.println("<h1>"+"Result="+c+"</h1>");
}
if (s1.equals("/")) {
c=a/b;
out.println("<h1>"+"Result="+c+"</h1>");
}
}
}
Web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0">
<servlet>
<servlet-name>calcservlet</servlet-name>
<servlet-class>calcservlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>calcservlet</servlet-name>
<url-pattern>/calc3</url-pattern>
</servlet-mapping>
</web-app>
output:
client page output:
server page output:
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