Getting error

Hi,

I tried to get selected value into my Servlet page but I did n't able to get the selected value.Am getting exception.Please give me
solution to solve this problem.First i run my operator.jsp .This page contains two frames.In left side am getting values from database
through radio button.In right side of the page contains text box and submit button.If i select any radio button value and give input into
text box when submit the transfer or hold button clicked the corresponding action will be performed into my Servlet page.But i should n't able to run successfully.Am getting the Null pointer Exception.

This is my JSP code operator.jsp

<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>

</script>
<script language="JavaScript" type="text/javascript">

function whatever()
{
for (var i=0; i < window.frames['inner1'].document.checktest.callerid.length; i++)
   {
   if (window.frames['inner1'].document.checktest.callerid[i].checked)
      {
      var rad_val = window.frames['inner1'].document.checktest.callerid[i].value;

document.getElementById('idtemp').value=rad_val;
      }
   }
}

</script>
<style type="text/css">
input.field
{
   height:20px;
   font-family:Verdana, Arial, Helvetica, sans-serif;
   font-size:14px;
   text-align:right;
}
 .btn
{
    width:40px;
   height:20px;
 }
  .btn0
{
    width:100%;
   height:30px;
 }
</style>

<div id="wrap">
<div id="header">
<h1><a href="#"><u>Operator Console</u></a></h1>
<h2></h2>
</div>
<br />
<br />
<br />
<br />
<br />
<br />
<center>
<table width="712" height="89" border="0" align="center">
  <tr valign="middle">
    <td width="709">
	
	<div id="top"> </div>

</td>
  </tr>
  <tr>
    <td height="149"><table width="321" height="166" border="0">
      <tr>
        <td width="157" height="100">
		
		
  <table width="100%" border="0">
    <tr>
      <td align="center" valign="middle"><table width="156" border="0">
          <tr>
            <td colspan="4" align="center" valign="middle"><input name="agentno" type="text" class="field" id="txtInput" style="width:100%;" maxlength="10"/>
         <input type="hidden" name="txtStored" id="txtStored"/>
        <input type="hidden" name="txtTypeof" id="txtTypeof"/>        </td>
          </tr>
          <tr>
            <td width="57" align="right" valign="middle"><label>
              <input name="7" type="button" class="btn" id="7" value="7" OnClick="calc.txtInput.value += '7'"/>
            </label></td>
            <td width="43" align="right" valign="middle"><input name="8" type="button" class="btn" id="8" value="8" OnClick="calc.txtInput.value += '8'"/></td>
            <td width="42" align="left" valign="middle"><input name="9" type="button" class="btn" id="9" value="9" OnClick="calc.txtInput.value += '9'"/></td>
          </tr>
          <tr>
            <td align="right" valign="middle"><input name="4" type="button" class="btn" id="4" value="4" OnClick="calc.txtInput.value += '4'"/></td>
            <td align="right" valign="middle"><input name="5" type="button" class="btn" id="5" value="5" OnClick="calc.txtInput.value += '5'"/></td>
            <td align="left" valign="middle"><input name="6" type="button" class="btn" id="6" value="6" OnClick="calc.txtInput.value += '6'"/></td>
          </tr>
          <tr>
            <td align="right" valign="middle"><input name="3" type="button" class="btn" id="3" value="1" OnClick="calc.txtInput.value += '1'"/></td>
            <td align="right" valign="middle"><input name="2" type="button" class="btn" id="2" value="2" OnClick="calc.txtInput.value += '2'"/></td>
            <td align="left" valign="middle"><input name="1" type="button" class="btn" id="1" value="3" OnClick="calc.txtInput.value += '3'"/></td>
          </tr>
          <tr>
            <td align="right" valign="top"><input name="0" type="button" class="btn" id="0" value="0" OnClick="calc.txtInput.value += '0'"/></td>
            <td align="center" valign="middle"><input name="reset" type="reset" class="btn0" id="reset" value="Dial"/></td>
            <td align="center" valign="middle"></td>
          </tr>
      </table>
      <br /></td>
    </tr>
  </table>

</td>
        <td width="148">
				</td>
      </tr>
    </table></td>
  </tr>
</table>
	</td>
  </tr>
</table>
</div>
<div class="left">

<table width="200" border="0">
  <tr>
    <td height="191">
	
	<table width="170" border="0">
  <tr align="center">
    <td width="160"><b>Incoming Calls</b></td>
</tr>
<tr>
     <td><iframe width="160" name="inner1" src="refresh1.jsp"></iframe></td>
	
<%/*
  try
  {
  Class.forName("com.mysql.jdbc.Driver").newInstance();
  Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "user", "user");
 Statement st = conn.createStatement();
  ResultSet rs=st.executeQuery("select call_no,callerid from waiting");
while(rs.next())
{*/
%>
<tr>

<td>
<br />
</td>
<% /*
}
}

catch(Exception e)
{
e.printStackTrace();
}*/
%>

</tr>
	 </table>
	 
	 </tr>
     <tr align="center"> 
      <tr>

<td>
<br />
</td>
 </tr>
  
</table> 
       
</div>
<div style="clear: both;"> </div>
</div>
<div id="bottom" align="center">© Peopletech System Private Ltd. </div>
		</td>
  </tr>
</table>
</center>
<div id="footer">
</div>
</div>
</form>
</body>
</html>

refresh1.jsp

The final one is Servlet code...
MainServlet.java

public class MainServlet extends HttpServlet  
{
	Statement st;
	ResultSet rs=null;
	Connection conn = null;
	private ManagerConnection managerConnection;
	private ParkAction parkAction;
	private RedirectAction redirectAction;
	private  HangupAction hangupAction;
    String channel1;
	public void doGet(HttpServletRequest request,HttpServletResponse response)
      	throws ServletException, IOException 
		
	  {
	    PrintWriter out = response.getWriter();
  		response.setContentType("text/html");
		HttpSession session = request.getSession(true);
		
		String callerid=request.getParameter("callerid");
		out.print(callerid);
		String agentno1=request.getParameter("agentno");
		out.print(agentno1);
	
			
		String option=request.getParameter("input");

if(option.equals("Hold"))
		{
	
			try 
			{
				
				Class.forName("com.mysql.jdbc.Driver").newInstance();
				conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "user", "user");
				st = conn.createStatement(); 
				ManagerConnectionFactory factory = new ManagerConnectionFactory("192.168.1.101", "admin", "amp111"); 
				rs=st.executeQuery("select * from calldetail where callerid='" +callerid+ "'");

this.managerConnection = factory.createManagerConnection();
			         OriginateAction originateAction;
			         BridgeAction bridgeAction;
			    	 originateAction=new OriginateAction();
			    	 String caller=originateAction.getCallerId();
			    	 originateAction.getCallerId();
			    	 String ochan=originateAction.getChannel();
			    	 ManagerResponse redirectResponse;	
			         redirectAction=new RedirectAction();
			         if(rs.next())
			         {
			     
			        channel1=rs.getString("channel"); 
			        out.println(channel1) ;
			        redirectAction.setChannel(channel1);
			        redirectAction.setContext("from-internal");
			        redirectAction.setExten("111");
			        redirectAction.setPriority(new Integer(1));
			        String redirect=redirectAction.getChannel();
			        managerConnection.login();
			        redirectResponse=managerConnection.sendAction(redirectAction, 30000);    
			        System.out.println(redirectResponse.getResponse());
			        managerConnection.logoff();
			        }
			} 
			catch (Exception e) 
			  {
			      e.printStackTrace();

}
		}
else if(option.equals("Transfer"))
		{
			
			try 
			{
				
				Class.forName("com.mysql.jdbc.Driver").newInstance();
				conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "user", "user");
				st = conn.createStatement(); 
				ManagerConnectionFactory factory = new ManagerConnectionFactory("192.168.1.101", "admin", "amp111"); 
				rs=st.executeQuery("select * from calldetail where callerid='" +callerid+ "'");
				this.managerConnection = factory.createManagerConnection();
			        
					  OriginateAction originateAction;
			          hangupAction=new HangupAction();
			      	  ManagerResponse redirectResponse;	
			    	  ManagerResponse hangupResponse;
			          redirectAction=new RedirectAction();
			         
				if(rs.next())
			         {
					String channel1=rs.getString("channel");   
				    out.println(channel1);
			        hangupAction.setChannel(channel1);
			        redirectAction.setChannel(channel1);
			        redirectAction.setContext("default");
			        redirectAction.setExten(agentno1);
			        redirectAction.setPriority(new Integer(1));
			        String redirect=redirectAction.getChannel();
			        managerConnection.login();
			        redirectResponse=managerConnection.sendAction(redirectAction, 30000);  
			        System.out.println("redirect"+redirectResponse.getResponse());
			        managerConnection.logoff();      
				
			         }
			} 
				catch (Exception e) 
				{
			   	
			   	e.printStackTrace();
				}
        	}

The following error message will be getting...
java.lang.NullPointerException
MainServlet.doGet(MainServlet.java:35)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

Regards,
Suganya.

In which line does the exception occur? Which object is null?

Hi,

I should not able to get the selected radio button value in my servlet page and am getting the values from Jsp page using this function.

String callerid=request.getParameter("callerid");
out.print(callerid);

Regards,
Suganya

I'm not following. Both JSPs have a form field "callerid", so I would expect to be able to get a value. Why do you think otherwise?

I'm also still not clear on which line throws the exception, and which object is null - the "callerid" parameter? If you don't expect a value to be transmitted then that should not be a surprise.

Hi,

in your first jsp , you have hidden field right?

i guess your callerid value is not set in javascript properly.

Hi,

I change that field <input type="hidden" name="idtemp" id="idtemp"/> now i get null values...Please help me..
How to solve this problem...

Regards,
Suganya