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Frequently Asked Questions

How do I create a Java string from a C++ string?

JunC++ion frequently asked questions
Information on the ins and outs of creating Java strings based on C++ strings, one of the trickier parts of the framework.

How do I create a C++ string from a Java string?

JunC++ion frequently asked questions
Information on the ins and outs of creating C++ strings based on Java strings, one of the trickiest parts of the framework.

How do I create a C-style nul-terminated string?

Ada FAQ: Programming with Ada
In a declaration block, append an ASCII.NUL to create a constant Ada string. declare Str_Nul : constant String := Str & ASCII.NUL; begin Call_Requiring_C_String (Str_Nul (Str_Nul'First)'Address); end; -- or -- function Nul_Terminate (Str : String) return String is Str_Nul : constant String := Str & ASCII.NUL; begin return Str_Nul; end Nul_Terminate;

Do I need to know C++ before Java?

Java and C++ are meant for two different purposes. Of course they are two widely used OOPLs (Object Oriented Programming Languages). Knowing one is not a prerequisite to another. However, C is the prerequisite to both these language as these two use the same control structures of C.

How to communicate between Java and C++?

FAQ on C/C++/Unix by Roseanne Zhang, Java Programmer Certifi...
Socket: you can pass any information from C/C++ to Java or Java to C/C++. However, if you want to call each other's method/function. You will find out you need to you need to marshal and unmarshal your methods by yourself. You're creating your own protocols. You'd be better off use CORBA. Corba is just for what you want, you use IDL to write your the function or methods, then compile it to C/C++ and Java to use.

Why is Kannel written in C and not in Java?

Kannel: Open Source WAP and SMS Gateway
The Kannel team does not have a strong expertise in Java, so re-implementing Kannel in Java would require us to spend weeks learning the language well. The re-implementation work itself would also take some months. There is no point in doing this.

Why do you not teach C++ or JAVA?

FAQ
Even though we have on staff several teachers who have computer science/programming backgrounds, we feel that these are not appropriate languages to teach the concepts of programming and have kids create a project on their own that they can be proud of. The software we use have been given numerous awards by educational technology magazines and are chosen as to their merit to teach programming.

How can I interface to C / Java?

scheme-faq-standards
Most Schemes support a so-called "foreign function interface" (FFI) to the native language (i.e. the language in which the Scheme interpreter/compiler was implemented). FFIs provide the following features: Calling native code from Scheme The most basic FFIs allow you to write functions/methods following certain conventions and then call these native functions/methods from Scheme.

What is the difference between Java and C++?

Java Language FAQs
Java is a roubust and platform independent language which is used to develop business and internet applications. Function and class Templates. Java has Generics (which are simlar to Templates though not same) in version 5.0

Which is which string stream header in GNU C++ ?

UNaXcess : FAQ
lt;sstream> contains the new standard-compliant version. You can use a sstream file with older compilers to remain standards-compliant with older gcc versions. There is stdint.h, which I believe is mentioned in the standard. There you will find uint32_t and lots of other fun things - have a look.

Are there other useful C++ string functions I can use?

CMSC 214 - Project #0 FAQ
Yes. You want to be careful when using C++ strings. For example, although it happens to be permissible to modify the characters of a C++ string, you generally use concatentation (the + operator) to increase the size of the string (there are other ways). Here are two useful functions you can use: char ch = 'A'; string str( 1, ch ); // constructor to convert character to string This constructor takes two arguments. The first is an int, which is the number of repetition.

How does C++'s string differ from C's?

Tech Talk about C++ and C Issues / Comeau C++ and C FAQ
Which string do I use if I want a const string? Just like there are some differences between char [?] and char *, there are also differences between them and C++'s std::string class. In short, with a C-like string you often need to worry about: Etc. With std::string, you usually don't need to worry about those things. Therefore, often std::string makes things: Easier to teach Consider this comparison: // The "C way": #include <cstring> // <string.

Will we ever get Java?

Answers to Some Frequent webtv.users Questions
According to posts in webtv.users from Steve Perlman, ex-president of WebTV, WebTV has been working to provide a form of Personal Java for the WebTV Plus terminal (and possibly the new Classics and Dishplayer, but nothing was said specifically about them as they were not announced products at the time of the posts)?there is no guarantee this will happen. For the full text of Steve's posts, click here.

How do I create a multimap in Java?

jGuru: Collections FAQ Home Page
Typically a Map maps a key to a single value. To have a multimap, the values of a Map should be a List instead. Thus there can be multiple values in the...

How do I create an array of Java objects?

Tcl/Java Project
array object is created with the java::new command. To create an int[5] array with values 11 through 15, you would enter: set arrayObj [java::new {int[]} 5 {11 12 99 14 15}] $arrayObj set 2 13 Note that in the above example the array type is passed with brackets around it.

How to define arrays in Java, C/C++, and C#? Are they different?

JavaChina: SCJP Questions & Answers by Roseanne Zhang (8...
float[] only applies to the first variable of the right variable list. float[] f1d_a, f1, f1d_b[]; // is equivalent to float f1d_a[]; // or float[] f1d_a; float f1; // f1 is not an array float f1d_b[]; // or float[] f1d_b; In Java, better, but still confusing!! float[] applies to all variable of the right variable list.

How do I call a c program from php, it has to pass a string with it and have ti return a string?

FAQTs - Knowledge Base - faqts : Computers : Programming : L...
Error trying to view page ,WHY? "Document contained no data"-NS "Page is currently unavailable"-IE

How do I convert an 8-bit descriptor to a Java string?

Descriptors FAQ
These days, it's not necessary to use the Symbian cast macros (eg REINTERPRET_CAST) since these are simply defined as the equivalent C++ standard (eg reinterpret_cast). They're a legacy from when GCC didn't support the casts.

How does Java String concatenation, or the overloaded + between different types, work?

JavaChina, SCJP Questions and Answers by Roseanne Zhang (2)
Go to your JDK1.2.2/JDK1.3 directory, find src.jar, unjar it. Then you can see all source code of JDK.Goto src\java\lang, to find StringBuffer.java and String.java. Search for append in the beginning comments of StringBuffer.java, then follow the lead, you will find out all the secrets you are interested in. "If you give me a fish, You feed me for the day.

How do I split a string?

Frequently Asked Questions for comp.lang.lisp
There is no 'right' answer to this question; many lisp programmers have rolled their own solution in the past, and others are of the view that it should never be necessary, as long as all sequence functions are used with consistent :start and :end arguments. However, a community-based 'standard' was developed in June/July 2001 on comp.lang.lisp; known as SPLIT-SEQUENCE (formerly PARTITION), it works as follows in its simplest form: split-sequence #\Space "A stitch in time saves nine.
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