navi2000

Hi, I'm new to Java and I would like to know if there is a C-style include functionality in Java.

In C/C++ you could tell compiler that must include all files in a given folder. These files will be compiled together with your project.

In Java, I'm using Netbeans and this functionality seems not to be present. You can add a folder (project properties/libraries), but the files must be pre-compiled (class files, not Java files).

My intention is to have a separate set of java files that many projects can include at convenience, so if I change anything in these set of files and recompile a project, it will be reflected automatically.

amragman

In Java we use import keyword to include library files.
Syntax is import java.io.*;

If you want to use your own files as library files first make sure they are compiled then put them in appropriate folder and use it like this

import foldername.filename;

For more please use Google.

__________________
Genemesis

navi2000

I'm not talking about to use a Java source file from another source file. I'm talking about include a folder with several Java files to the project that will be compiled at the same time the project files will.

For instance, when I create a new Java project, NB creates a structure with a folder "src" where my Java files will be put. I want to include an additional folder outside my project (i.e. ../common/src). In C it's easy changing a project setting and I would like to know if it is as easy or it's not possible to do it.

amragman

Simply use import foldername.*;

Here folder should be located locally just like in C or C++

I said compiled files because sometimes it becomes messy to correct errors when they come from many files.

__________________
Genemesis

navi2000

import foldername.* cannot work because the folder that contains the Java files I want to include is outside my project structure (really it is part of another project).

amragman

You can always copy the folder to working project..

__________________
Genemesis

Alexandra N

I'm not sure if this is what you're looking for, but I'd recommend you to read a little about JNI.
"The JavaTM Native Interface (JNI) is a powerful feature of the Java platform. Applications that use the JNI can incorporate native code written in programming languages such as C and C++, as well as code written in the Java programming language"(from The Java Native Interface Programmer's Guide and Specification)