Hi guys, I have a question about error handling. Still working on the addition application and now that I've learned what are the correct exceptions to handle I'm not sure what to do when I've established that the my inputs are all valid and print my result. Let's have a look at the calculator class again: package my.vaadin.project.exceptionTest; import java.awt.Component; import java.util.InputMismatchException; import com.vaadin.server.Page; import com.vaadin.shared.Position; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.CustomComponent; import com.vaadin.ui.Notification; import com.vaadin.ui.TextField; import com.vaadin.ui.VerticalLayout; import com.vaadin.event.Action; public class Calculation extends CustomComponent{ final VerticalLayout vl = new VerticalLayout(); final TextField dividend = new TextField(); final TextField divisor …

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Hi Guys I ran into a bit of a problem with some code I am writing. I am trying to store all possible combinations of a set of numbers which are current being stored in List. Problem is my code run into an out of memory exception, heres my code: public void GetAllPossibleCombos(Dictionary<int, decimal> numbers) { var allNumbers = numbers.Keys.ToArray(); var possibleLines = new List<Line>(); Combinations<int> normalCombo = new Combinations<int>(allNumbers, 5); foreach(IList<int> n in normalCombo) { var line = new Line(); line.Number1 = n[0]; line.Number2 = n[1]; line.Number3 = n[2]; line.Number4 = n[3]; line.Number5 = n[4]; possibleLines.Add(line); } } } …

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As part of a class in Java, the constuctor is supposed to throw a java.lang.IllegalArgumentException exception when an integer that is a field in the class, let's call it int N, is set to a negative vale. How do I set this up?

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i developing a poster software, when i'm trying to post a link it give the following exception facebook api exception #100-invalid here's my code public static bool post(string accesstoken,string status,string link) { try { FacebookClient fb = new FacebookClient(accesstoken); Dictionary<string, object> postArgs = new Dictionary<string, object>(); postArgs["message"] = status; if (link != "") { postArgs["link"] = link; MessageBox.Show(link); } fb.Post("/me/feed", postArgs); return true; } catch (Exception ex) { MessageBox.Show(ex.ToString()); return false; } } }

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Hi, I am trying to use an exception catch properly but I am getting lost and frustrated. I've changed my code so many times and cannot figure out why when it catches the exception it will not let me continue to enter data into the array. It just displays it and all entries after the bad input is null(0). any help would be greatly appreciated. Have a nice day, C.D. below is the output and then the code; Please enter a test score for student I.D.# 101 >> 106 You have entered an invalid score for this student they will …

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hello i am doing my assignment on simple calculator in java.Now I want to handle exceptions in it. so i need some information about exception for exemple a user enter any expression like `(10+23+56-55)` it is corrent formate but when the user enter wrong formate like `(20++56//5)` i mean operator in wrong formate so it is also an exception now i want to handle it. i need a built in class that handle this type of exception.

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Exception message is not showing import java.util.*; class WrongException extends Exception{ public WrongException(String s){ super(s); } } public class UserDefinedException2{ public static void main(String s[]){ int a,b; a=b=0; Scanner ob=new Scanner(System.in); System.out.print("Enter your age = "); a=ob.nextInt(); try { if(a<=0) throw new WrongException("age cannot be zero or nagetive"); System.out.print("age = "+a); } catch(WrongException e){ System.out.print("wrong"); } } } `throw new WrongException("age cannot be zero or nagetive")` this message is not showing why?? and this message is showing `System.out.print("wrong")` please help me

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if a program throw 2 exceptions can we handled it by user defined exception.for example import java.util.*; class WrongException extends Exception{ public WrongException(String s){ super(s); } } public class UserDefinedException2{ public static void main(String s[]){ int a,b; a=b=0; Scanner ob=new Scanner(System.in); System.out.print("Enter your age = "); a=ob.nextInt(); try { if(a<=0) throw new WrongException("age cannot be zero or nagetive"); System.out.print("age = "+a); } catch(WrongException e){ System.out.print(e); } } } the upper code handled an negetive and zero value exception.there exception can occure that throw `InputMismatchException` then how we can handled it. now we will handled two exceptions my question is how …

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Following exceptions are `Checked Exception` or `Unchecked Exception` ArrayStoreException IllegalArgumentException

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exception is a run time error,then why exceptions are again classified into compile time exception and run time exception,in that case it should be run time exceptions only.please give explanation with suitable real time example

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I recently developed an application and it successfully ran in my computer where I developed. But when I tried to run in my client's system, it returns: An unhandled microsoft .net framework exception occurred in Members Manager.exe [2916] The number in the square braces appears randomly. I can't figure out what is the cause for this problem. I created the application in .NET framework 4.0 and I installed the same in client system. My other application of same framework work perfectly except this one. But this application runs perfectly in my system. I tried installing Visual Studio in client machine …

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Hello, I am experiencing a very unusual problem. If an exception occurs within my Frm_Load method which handles MyBase.Load, the method simply ends, a nice message is printed to the debug windows explaining the error, and program execution continues. The problem is, I want an error in the Load method to crash the program. VB simply decides to ignore the rest of the code after the exception but continues program execution; this causes many initializations to never be performed in my program. How can I make my load method halt execution when an exception is thrown? Thanks, Patrick

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if (!empty($_POST['twitnam'])) { $message = $_POST['message']; $TwitterUsername = $_POST['twitnam']; $tw_sql = mysqli_query($connection, "SELECT oauth_token,oauth_token_secret FROM TwitterUpdate WHERE uname='$TwitterUsername'"); $row = mysqli_fetch_array($tw_sql, MYSQLI_ASSOC); $oauth_token = $row["oauth_token"]; $oauth_token_secret = $row["oauth_token_secret"]; if (strlen($oauth_token) > 0 && strlen($oauth_token_secret) > 0) { $Twitter = new EpiTwitter($consumer_key, $consumer_secret); $Twitter->setToken($oauth_token, $oauth_token_secret); $status = $Twitter->post_statusesUpdate(array('status' => $message)); echo $status->id_str; } } every time i try to run the script i got: Fatal error: Uncaught exception 'EpiTwitterNotAuthorizedException' with message '{"errors":[{"message":"Could not authenticate you","code":32}]}' in /****/EpiTwitter/EpiTwitter.php:254 Stack trace: #0 /*****/EpiTwitter/EpiTwitter.php(217): EpiTwitterException::raise(Object(EpiCurlManager), false) #1 /*****/EpiTwitter/EpiTwitter.php(118): EpiTwitterJson->__get('response') #2 /******/EpiTwitter/EpiTwitter.php(100): EpiTwitter->request('POST', '/statuses/updat...', Array) #3 /*****/fbmain.php(98): EpiTwitter->__call('post_statusesUp...', Array) #4 /*****/fbmain.php(98): EpiTwitter->post_statusesUpdate(Array) #5 /****/index.php(17): in …

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Are exceptions standardized in C++? I mean if the rules of exception handling might be changed in the future. i.e: int Funct1(int) throw(); // does it throw an exception?

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I have an assignment for my cps class in which we have to create a program that will import a file from a server that has a bunch of numbers in it. The program is suppose to take those numbers, sort them, give the minimum and maximum value, average, median, and print the data. But when I compile it, it states that "java:12: error: unreported exception FileNotFoundException; must be caught or declared to be thrown". What does it mean??? import java.util.*; import java.io.*; public class sorting public static void main(String[]args) { double num[]=new double[1000]; int n; double average,median; n=getdata(num); sortdata(num,n); …

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I have been plagued by an issue for the past couple of days and I am yet to find a solution. I have an service installed at several customer sites. This service grabs data from a database, packages it up and then submits it to a web service hosted on a different server. This is done using SOAP and everything works absolutely fine when I am running the submission service under .NET 2. However, after a recent upgrade to .NET 4, I have been receiving a SoapException when my submission service attempts to logon to the web service. The error …

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Hello all, I am stuck with a nullpointerException at line 41 and 60.Can someone please help me out.any kind of help will be appreciated. Thanks import javax.swing.*; import javax.swing.event.*; import java.awt.Color; import java.awt.*; class calenders extends JFrame { int i=0; int j=0; int k=0; JFrame jf; FlowLayout fl; JPanel jp[]; JButton jb []; JButton jb3[]; Button b[]; calenders() { jf=new JFrame ("Happy 2014 :-)"); fl=new FlowLayout(); b=new Button[12]; jp=new JPanel[12]; String days[]={"Sun", "Mon","Tue", "Wed", "Thurs", "Fri", "Sat"}; String months[]={"Jan", "Feb","March", "Apr", "May", "July", "August","september","october","november","december"}; //JButton jb1=new JButton("Previous"); //JButton jb2=new JButton("Next"); jb3=new JButton[7]; String dates[]={"1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20", "21","22","23","24","25","26","27","28","29","30","31"}; jb=new JButton[31]; Color colors[]={Color.blue, Color.yellow, …

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Hello, I got this question from my quiz : > Consider the following code (assume that comments are replaced with real code that works as specified): public class TestExceptions { static void e() { // Might cause any of the following unchecked exceptions to be // thrown: // Ex1, Ex2, Ex3, Ex4 } static void April() { try { e(); } catch (Ex1 ex) { System.out.println("April caught Ex1"); } } static void March() { try { April(); } catch (Ex2 ex) { System.out.println("March caught Ex2"); // now cause exception Ex1 to be thrown } } static void February() { try …

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Quite commonly I see people using one of the Parse routines then catching the exception thrown if the parse fails. This is, in general, a bad practice as throwing an exception is slower than using the corresponding TryParse method. This short snippet shows the routines that I used to measure the timing of each. The results on 100,000 strings, 1/2 of which were 'bad' was: [code=text]TryParse took 1,142 milliseconds Exception took 56,179 milliseconds[/code] As you can see Exceptions are over 50 times slower. Get into the habit of using TryParse. Before you bring it up, yes parsing 100,000 strings in …

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Hey everyone, I was attempting to get the lastmodified file from a folder, and to do so I used File.listFiles() method which is returning a null pointer exception even though the folder is not empty. I had this piece of code working about two days ago and I am not sure what changed since. I have looking java docs and I have realized that File.listFiles() will return a null if the arbitrary path is not found. But in this case the path does exists and as I mentioned it did work two days ago. The for loop (has comment besides …

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Hi All I have googled this exception extensively, and all the discussions I've found seem to be related to file uploading and exceeding the allowed file size limit. In my case however, I am not uploading anything, it is a simple postback. I have a gridview displaying the results of an SQL query. This works correctly and displays the data as expected. Also, on the page are a couple dropdowns used to filter the data via control parameters on the SQL data source. However, any postback created on the page cause the above exception. I have tested the query and …

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Hi All, Im trying to learn how to use pdo, and am curious to know how i best can deal with allkind off errors. Lets say there is a typo, or im selecting an non existing row etc etc. In my connection, do I have do set anyting different here: Class PDO_CONNECTION extends PDO { public function __construct( $DSN, $USER = '', $PASS = '', $DRIVER_OPTIONS = array( PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION) ) { // OPRET PDO OBJECT FRA PARENT PDO CLASS : parent::__construct( $DSN, $USER, $PASS, $DRIVER_OPTIONS ); } } When I run this query, is this the "best way"to …

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I have a .Net web application where any uncaught exceptions get handled via the Application_Error event in Global.asax. Here, I email myself details of any uncaught exceptions that sneak through. My problem is that while I am getting the error messages just fine, I am not getting the line numbers in the stack trace to denote where the error is happening. The Application_Error code is as follows: Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Error ' Fires when an error occurs Dim Context As System.Web.HttpContext = HttpContext.Current Dim Ex As System.Exception = Context.Server.GetLastError.GetBaseException Dim Path As String …

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Hi I have a set of Checkboxes each with a Textbox next it to. I have the following code, which is meant to loop through each CheckBoxe and if checked if gets the text contained in the textbox, these are linked through the tag of the checkbox, i have used it before and it worked fine but this time i am getting the following error: Null Reference Exception was unhandled Object reference not set to an instance of an object. I have checked by simply getting get the tag and the value of the linked textbox and both are populating …

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Hi All, Could you please clear my doubt why this second catch block is called when exception is thrown only once. #include <iostream> using namespace std; class E { public: const char* error; E(const char* arg): error(arg) {} }; class B { public: B() {}; ~B(){cout<<"~B() called"<<endl;} }; class D: public B { public: D(); ~D() { cout<<"~D() called"<<endl; } }; D::D() try :B(){ throw E("Exception in D"); } catch(E&e) { cout<<"D()"<<e.error<<endl; }; int main() { try { D val; }catch(...) { cout<<"Last"<<endl;} }

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I have been working on a conversion project for last few days where I need to convert a Java library to C#. At one point I came to java's certain feature called [Exceptions Thrown by a Method](http://docs.oracle.com/javase/tutorial/essential/exceptions/declaring.html). Here is a little glimpse of it: public boolean isRequest() throws NullPointerException { // blocks of code implementing isRequest() method; } For the C# implementation of this code snippet, I searched the web and quite shockingly found that, **C# does not support throwing exceptions in the compile time**. Now my question is, how can I implement this code portion in a C# library?

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exception handling

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I am beginner on java and i am having trouble while compiling below given code on CMD. **This code is taken from a book.** > E:\sher\SkyDrive\Exercise Files\L04>javac Student.java > > E:\sher\SkyDrive\Exercise Files\L04>java Student > Exception in thread "main" java.lang.NoSuchMethodError: main > // Student.java /* Demostrates the most basic features of a class. A student is defined by their name and rollNo. There are standard get/set accessors for name and rollNo. */ // public Static Void main (String args[]){} public class Student{ private String name; private int rollNo; // Standard Setters public void setName (String name){ this.name=name; } // Note the …

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hi, i have a drop down list populated with column names of tbl_student and a text box for searching specific value coresponding to the value selected in drop down list i do not have much knowlewdge about qureies might b m lacking there error is Incorrect syntax near '=' my code is private void Search(string field) { DataTable dt = new DataTable(); SqlConnection connection = new SqlConnection(GetConnectionString()); try { connection.Open(); //string sqlStatement = "SELECT * FROM tbl_student WHERE student_id = @student_id"; string strQuery = "SELECT * FROM tbl_student WHERE" + ddl_SearchBy.SelectedValue + "= @" + ddl_SearchBy.SelectedValue + ""; SqlCommand sqlCmd …

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hi im new to java.i wrote a simple programme and need a little help.i should enter an int as the input but when i entere a string, it gives an exception. Exception in thread "main" java.lang.NumberFormatException: For input string: i need a dialog box to be appeared when i enter a string instead of an int displaying "invalid" or something like that.here is my programme how do i enter my coding here?

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The End.