wrapper

问题 I have been searching for many similar posts about this but I still can't find my answer. I want to convert a .java program into a Linux executable file, without the .jar extension. How can I do it? I am trying to use Launch4j java wrapper, JWrapper, IzPack, making a .sh, making a .bat, running it using java -jar myFile.jar etc. but none of them worked. Some procedures are complicated and difficult to debug. Is there any straightforward way to convert a .java file or .jar file into a Linux

问题 I have been searching for many similar posts about this but I still can't find my answer. I want to convert a .java program into a Linux executable file, without the .jar extension. How can I do it? I am trying to use Launch4j java wrapper, JWrapper, IzPack, making a .sh, making a .bat, running it using java -jar myFile.jar etc. but none of them worked. Some procedures are complicated and difficult to debug. Is there any straightforward way to convert a .java file or .jar file into a Linux

问题 I'm having quite a problem here, and I think it is because I don't understand very much how I should use the API provided by Java. I need to write an int and a byte[] into a byte[] I thought of using a DataOutputStream to solve the data writing with writeInt(int i) and write(byte[] b) , and to be able to put that into a byte array, I should use ByteArrayOutputStream method toByteArray(). I understand that this classes use the Wrapper pattern, so I had two options: DataOutputStream w = new

问题 I'm having quite a problem here, and I think it is because I don't understand very much how I should use the API provided by Java. I need to write an int and a byte[] into a byte[] I thought of using a DataOutputStream to solve the data writing with writeInt(int i) and write(byte[] b) , and to be able to put that into a byte array, I should use ByteArrayOutputStream method toByteArray(). I understand that this classes use the Wrapper pattern, so I had two options: DataOutputStream w = new

问题 public class Primitive { void m(Number b, Number ... a) {} // widening, autoboxing->widening->varargs void m(byte b, Number ... a) {} // unboxing, autoboxing->widening->varargs public static void main(String[] args) { Byte b = 12; Primitive obj = new Primitive(); obj.m(b, 23); } } I have already searched and found that widening priority is higher than unboxing, so in above method invocation, first method should have been called because second parameter is same for both. But this does not

问题 Just trying to understand auto-boxing, which I do apart from one thing: Short s = 250; Long l = 250; The assignment to Long l fails. This, I expect, is because you cannot widen then box (i.e. it tries to widen the int value 250 to a long and then box it which it cannot do). However, the assignment to Short s works. What is going on to make this fine? My assumption was it is still doing boxing and some kind of conversion. But if it's a case of it knowing 250 fits into a short , why does it not

问题 Is there any open source tool for automatically generating .NET wrappers for a COM DLL library? 回答1: You can try to use SWIG which is able to generate wrapper code for 18 languages. Also this MSDN article might be useful. 回答2: There is no wrapper necessary to use a COM object in .NET. In Visual Studio, right-click your project name in the Solution Explorer, and select "Add Reference." Any registered COM objects will be listed in the COM tab. Interop wrappers are only necessary when using .NET

问题 I have a function which works with a std::ostream . I need to support using a C file handle ( FILE* ). Should I be creating my own subclass of std::ostream which delegates to a FILE* ? 回答1: As Ben Voigt points out, you want to subclass streambuf . There are pages on the University of Southern California's website which have the documentation, header, and source for a GNU implementation of a streambuf subclass ( stdiobuf ) that wraps a FILE* . It has some dependencies on the library it is a

问题 Reference: http://java.sun.com/j2se/1.5.0/docs/guide/language/autoboxing.html "If your program tries to autounbox null, it will throw a NullPointerException." javac will give you a compile-time error if you try to assign null to a boolean. makes sense. assigning null to a Boolean is a-ok though. also makes sense, i guess. but let's think about the fact that you'll get a NPE when trying to autounbox null. what this means is that you can't safely perform boolean operations on Booleans without

问题 If I have a.com, a.cmd, a.bat, and a.exe files %PATH%, which one would Windows pick if I invoke just the command "a"? Is this officially spec-ed somewhere by M$? I just wanted to wrap my gvim.exe executable with -n, but my gvim.bat doesn't appear to get run neither from the command line, nor from the Run dialog. 回答1: See the command search sequence on Microsoft Technet The PATH and PATHEXT environmental variables each provide an element of the search sequence: PATH is the ordered list of