try-catch

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Java: Try-Catch-Continue? I'm reading in information from a text file and I want my code to throw an exception if there is an invalid type being read. However, I can't figure out how to have my program continue after an exception has been found while(input.hasNext()) { try{ type = input.next(); name = input.next(); year = input.nextInt(); } catch(InputMismatchException ex) { //System.out.println("** Error:

问题 I'm getting the following error in PHP: Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2003] Can't connect to MySQL server on 'localhost' (10061)' in C:\xampp\htdocs\project\Service\Database.class.php:26 Stack trace: #0 C:\xampp\htdocs\project\Service\Database.class.php(26): PDO->__construct('mysql:host=loca...', 'root', '', Array) #1 C:\xampp\htdocs\project\Service\Database.class.php(54): Service\Database::initialize() #2 C:\xampp\htdocs\project\index.php(15):

问题 I'd like to run several lines of code, but I'm unsure if any line will throw an error. If an error occurs however, I'd like the script to ignore that line and continue on. One choice would be to have a try-catch-end block, that skips over a block of code that may throw errors. However, as soon as an error occurs, the rest of the code after the error in the try-statement is not executed. TL;TR: Do I have another choice than writing a try-catch-end block for every individual line in the

问题 I know that you can catch "all exceptions" and print the exception by try { //some code... }catch(const std::exception& e) { cout << e.what(); } but this is just for exceptions derived from std::exception. I was wondering if there is a way to get some information from an ellipsis catch try { //some code... }catch(...) { // ?? } If the mechanism is the same as ellipsis for functions then I should be able to do something like casting the argument of the va_list and trying to call the what()

问题 How can Javascript duplicate the four-part try - catch - else - finally execution model that other languages support? A clear, brief summary is from the Python 2.5 what's new. In Javascript terms: // XXX THIS EXAMPLE IS A SYNTAX ERROR try { // Protected-block } catch(e) { // Handler-block } else { // Else-block } finally { // Final-block } The code in Protected-block is executed. If the code throws an exception, Handler-block is executed; If no exception is thrown, Else-block is executed. No

问题 My program is supposed to take the given value and find the other value with it. However, my try catch statement doesn't seem to be working. It never does the first 2 if statements which are the most essential parts of the program. The 3rd one does work when you input both values. Thanks in Advance. public void calculate(View view) { EditText length_find = findViewById(R.id.feet); EditText pounds_find = findViewById(R.id.pounds); try { //int length_int = Integer.parseInt(length_find.getText()

问题 Re: x86 assembly language - I have three 32-bit signed numbers: n1, n2, and n3. I want to imul n1 by n2 to get a 64-bit signed result. I then want to idiv that 64-bit result by n3. The problem is that if the 64-bit signed result is large enough and/or if n3 is small enough, an overflow will result and idiv will throw a #DE exception. If idiv simply set #DE on overflow, I could check to confirm that ((n1 * n2) / n3) * n3 + ((n1 * n2) mod n3) = (n1 * n2). If not, overflow would have occurred

问题 I am checking for services using WMI on a group of computers but with some I am getting errors. How do I capture these errors so I can take approptiate action? The query is $listOfServices = Get-WmiObject -credential $wsCred -ComputerName $comp.name -Query "Select name, state from win32_Service" If I get the following I want to try alternative credentials Get-WmiObject : Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) If I get Get-WmiObject : User credentials cannot be

问题 The program asks for the user input for the double num 1 and double num 2 and if there is an exception I want it to ask again for the input of num 1 and num 2 public static void main (String[] args) { Scanner sc = new Scanner(System.in); double num1, num2; int error = 0; int text; System.out.print("Enter 4 "); text = sc.nextInt(); do{ try{ if(text == 4){ System.out.print("Enter number 1: "); num1 = sc.nextDouble(); System.out.print("Enter number 2: "); num2 = sc.nextDouble(); double quotient

问题 I could see several topics on try - catch but doesnt seem to discuss errors if any from finally block itself. I found that the error is not handled if it is in finally block. What would be the ideal way to manage finally? For eg. below is a mail function. if there is any error in try block, finally will execute the quit method which itself is not initiated so an unhandled error occurs. So is it better to ensure there is no errors occur in finally block? def send_email(ldap, email_address,