exception

问题 I have a socket-connection going on and I wanna improve the exception handling and Im stuck. Whenever I use the socket.connect(server_address) function with an invalid argument the program stops, but doesnt seem to throw any exceptions. Heres my code import socket import sys import struct class ARToolkit(): def __init__(self): self.x = 0 self.y = 0 self.z = 0 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) self.logging = False def connect(self,server_address): try: self.sock

问题 I have faced following weird exception on GGTS IDE . Command terminated with an exception: org.grails.ide.eclipse.longrunning.client.GrailsProcessDiedException: Grails process died (see details for partial output) Grails process died ------System.out:----------- ------System.err:----------- I tried with following releases and still got same issue groovy-grails-tool-suite-3.3.0.RELEASE-e3.8.2-macosx-cocoa-x86_64-installer.dmg groovy-grails-tool-suite-3.3.0.RELEASE-e4.3-macosx-cocoa-x86_64

问题 I have a function that looks like this: def check_for_errors(result): if 'success' in result: return True if 'error' in result: raise TypeError return False In successful run of this function, I should get a bool , but if there is an error I should get a TypeError - which is OK because I deal with it in another function. My function first line looks like this: def check_for_errors(result: str) -> bool: My question is: Should I mention the error in my type hinting? 回答1: Type hinting can't say

问题 I'm trying to do the following: try { // just an example $time = 'wrong datatype'; $timestamp = date("Y-m-d H:i:s", $time); } catch (Exception $e) { return false; } // database activity here In short: I initialize some variables to be put in the database. If the initialization fails for whatever reason - e.g. because $time is not the expected format - I want the method to return false and not input wrong data into the database. However, errors like this are not caught by the 'catch'-statement

问题 I came across below doubts while learning java exception handling, Most(nearly all) of the example i've seen thows an exception using try bock and the appropriate catch prints a message to the user in the console and finally block used to close/release resources. Is exception handling is only about printing the message/cause for exception? While learning arithmetic exception the only example i got is DividebyZero scenario, is there any other operation that can cause arithmetic exception? 回答1:

问题 I have some Java code which reads the Excel data. On running the Java code, it's showing the following error. Help me resolve the same. Also, I need to know other method of reading .xlsx file. (A small edit) how I can print rows with their respective columns. For example: Age 19 20 21 Salary 35k 20k 40k . . . Exception in thread "main" org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals

问题 If I have an abstract class with the following function - abstract class A{ void foo(String s) throws Exception{ throw new Exception("exception!"); } } And then another class that extends the abstract class and implements its own version of foo - class B extends A{ void foo(String s){ //do stuff that does *not* throw an exception } } Will this create problems? Specifically in the following test case - Collection<A> col = new Collection<A>(); B b = new B(); col.add(b); for(A a : col){ a.foo();

问题 If I have an abstract class with the following function - abstract class A{ void foo(String s) throws Exception{ throw new Exception("exception!"); } } And then another class that extends the abstract class and implements its own version of foo - class B extends A{ void foo(String s){ //do stuff that does *not* throw an exception } } Will this create problems? Specifically in the following test case - Collection<A> col = new Collection<A>(); B b = new B(); col.add(b); for(A a : col){ a.foo();

问题 I keep getting this get this Exception : java.io.StreamCorruptedException: invalid stream header: 00000001 Server side I used this to send and receive int, works fine. Server: new DataOutputStream(player1.getOutputStream()).writeInt(P1); Client: dataFromServer = new DataInputStream(socket.getInputStream()); dataFromServer.readInt(); But when I try to send an object, like this, it gives the error. Server: new ObjectOutputStream(player2.getOutputStream()).writeObject(gameCrossword); Client:

问题 Situation: I have an application that uses http connections extensively (stream ripping app) and it is supposed to work 24/7. And it does. However, occasionally, it crashes with runtime error that is uncaught anywhere, and dumps following to the event log: Event Type: Error Event Source: .NET Runtime 2.0 Error Reporting Event Category: None Event ID: 5000 Date: 13.10.2010 Time: 11:02:30 User: N/A Computer: STREAM01 Description: EventType clr20r3, P1 streamsink.exe, P2 1.0.0.42484, P3 4c880fd9