exception

问题 I wrote an simple project using java rmi and exported to an executable jar file. When I tries to run it, sometimes i got exceptions and sometimes it works. When I specify -Djava.rmi.server.codebase=file:serverClasses/, it seems it didn't create the jar file correctly. Here is the stacktrace: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.lang.ClassNotFoundException:

问题 Basically I want to know how do you differentiate an error from an exception. In some programming languages accessing a non existent file throws an error and in others its an exception. How do you know if some thing is an error or an exception? 回答1: Like anything else - you either test it or read the documentation. It can be an "Error" or an "Exception" based on the language. Eg. C: Crashes and gives a divide by zero error. Ruby: >> 6 / 0 ZeroDivisionError: divided by 0 from (irb):1:in `/'

问题 Today I started coding a project that uses sqlite and when I tried to test it I received the java.lang.ClassFormatError: Invalid pc in LineNumberTable . Hope you can help me with it, because I'm just lost. I'v searched about this error, and came across some weird solutions to some weird causes. As I understand, none of them was causing my problem. I'm using "sqlitejdbc-v056" wich is inserted in my classpath. Edit: My JDK version is 1.7.0_03-b05 StackTrace: Exception in thread "main" java.lang

问题 How can the index be out of bounds when it actually is in bounds as shown by the stacktrace? Although the context may not matter we are working on a Lua parser/VM for an IDE on the Netbeans platform and this keeps creeping up. How can this be? Some strange concurrency issue? Thanks in advance for any insights. java.lang.IndexOutOfBoundsException: Index: 14, Size: 16 at java.util.ArrayList.rangeCheck(ArrayList.java:604) at java.util.ArrayList.get(ArrayList.java:382) at org.netbeans.lib.lexer

问题 I ran into this error and couldn't figure what's missing: {"Could not load file or assembly 'xxxxx, Version=1.0.0.42, Culture=neutral, PublicKeyToken=c5067b3d1110b13c' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)":"xxxxx, Version=1.0.0.42, Culture=neutral, PublicKeyToken=c5067b3d1110b13c"} In the detailed exception window, it also tells me: WRN: Assembly binding logging is turned OFF. To

问题 I had a (quick) look into the C++ standard and into an online C++ reference, but I could not find an answer to this simple question: Can the default constructor of std::list<int> throw? If so, why would it throw? 回答1: Short answer: it can , but it may be implemented in a way that is reasonably safe: The default constructor constructs an empty list, so there is little need to actually allocate memory in the process. Most list implementations won't allocate any memory for an empty list. However

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . I am trying to learn PHP, and i just moved to Exceptions and when i try a example from http://php.net/manual/en/language.exceptions.php Example #2

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . I am trying to learn PHP, and i just moved to Exceptions and when i try a example from http://php.net/manual/en/language.exceptions.php Example #2

问题 I came across an interesting situation today: I have a small app with a settings file, which is well documented in the documentation, but if the file is not there, what would be better: throw a filenotfoundexception and give a very depressive message that the settings file is not available, or create a custom exception (already, the disadvantage is the work in doing this, even though it'll take 10 minutes) called SettingsFileNotFoundException. This will give it away immediately, what the

问题 I'm getting a "SocketException: Bad file number" while attempting to read from a socket in an Android app and I have no idea what this means. I've googled it and haven't found any explanation of what it is. Any ideas? Thanks. 回答1: This is usually the result of the underlying socket being closed. The "number" is because file handles in the underlying C code use file numbers to identify handles. The socket may be closed by you, but it may also be closed by security exceptions, flaky network,