JSP :: Navigating When Exception Is Thrown

Oct 10, 2014

need to navigate/render a jsp when a custom exception is thrown from a code block in my app.for that in web.xml I have configured the error handling

<error-page>
<exception-type>com.exampl.RecordNotFoundException</exception-type>
<location>/WEB-INF/errorpages/recordnotfound.jsp</location>
</error-page>

Code block

@RequestMapping(value = "/record", method = RequestMethod.GET)
public ModelAndView getPages() throws RecordNotFoundException{

throw new RecordNotFoundException("E888", "This is custom message X");
}

My questions are:

Is this the correct way to invoke a jsp when my code throws an exception?Do I need a try catch block to handle the thrown RecordNot Found Exception, if yes how would I navigate to the jsp from the catch block?

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Feb 10, 2014

I have been working with socket programming. I was trying to develop a two way communication from server to client. The data is being received when sent from server to client but there is a problem when I am sending from client to server.

I am getting an error as "Socket is closed" pointing to the line where I have created a BufferedReader. I have simplified some part of my code to be very specific.

Code attached.

import java.io.*;
import java.net.*;
import java.util.*;
public class Server
{
public static void main(String args[])
{
String id="policeone";
int hashcodeid=0;

[Code] ....

Error::

Receiving string from client: 'java.net.SocketException: Socket is closed
at java.net.Socket.getInputStream(Socket.java:872)
at Server.main(Server.java:51)

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Java Code:

import java.io.FileOutputStream;
import java.net.URL;
import java.net.URLConnection;
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[code]...

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Assignment Directions:

1. Create a new class named “valuemethod”

2. Create a new method named “Main”

3. In Main Write the code that will call the method EnterPay and YearlySal

4. Create a new method named “EnterPay”

5. In the EnterPay method Write the code that asks the user to input their hourly wage. Use the formula to calculate their yearly salary: wage * 2040. Return the yearly salary to the main method

6. In the main method write the code that will display this: “Your yearly salary is:

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package valuemethod;
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[Code] .....

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try{
do
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if(N<0) {
throw new NegativeArraySizeException();
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[Code] .....
 
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i have a problem with navigating from a link in a primefaces tree menu to a specific page. The explanation is the following: I have a template with the following code :

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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[code]....

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Next this is the code that I know is producing the error:

/**
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*/
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[Code] ....

Look for the line with all the ***'s, it is producing the "java.lang.ClassCastException: java.lang.Double cannot be cast to java.lang.Integer".

The reason I dont undersand why its producing this error is because temp.get(i) should be a integer - averages.get(i) (is type double), I do believe automatic up casting is present here making them both a double then I multiply it by itself producing a double? I dont understand where the casing is occurring. And just incase you want the formula I'm using for standard deviation here it is:

((x1 - ave)^2 + (x2 - ave) ^2 + (xn - ave) ^ 2) / (n-1)

then squareroot above

Why I'm getting this error! I tried changing a few dataTypes but I just cant avoid exceptions being thrown everywhere .

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Attached below is also the code I have thus far.

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public class PayrollDemo
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[Code] ....

And this is the exception class.

public class InvalidNameException extends Exception
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No-arg constructor
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InvalidNameException.InvalidNameException();
^
symbol: method InvalidNameException()
location: class InvalidNameException
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[code].....

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Quote:

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CLASS SPELER

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