I need to create an application for sorting various types of polygons using various parameters such as height, volume or base area. Arguments for Filename which has parameters for polygons, Sort type, Sort method will be pass through command line.That file is in my resource folder outside my src folder in a project. I have implemented all programs, It works fine when I run using pass arguments through eclipse run configuration. But when I try to run my .jar file using cmd same arguments it gives me FileNotFoundException.
I opened my jar file using 7zip and noticed it never extracted my resource folder in .jar file. I searched online and tried including my resource folder in to build path of eclipse. But still does't work.
Follow these steps:
1) click project -> properties -> Build Path -> Source -> Add Folder and select resources folder.
2) create your JAR!
EDIT: you can make sure your JAR contains folder by inspecting it using 7zip.
Reefer this link as well How do I add a resources folder to my Java project in Eclipse
First, you need to create a source folder for resources, for instance name it res, and then move your image folder to res. When you generate the jar file, you will see the image folder, not the res folder or files separately.
This comes down to how you are generating the JAR file.
When you're exporting the jar in eclipse make sure to checkbox the button that says "Export java sources and resources" https://www.cs.utexas.edu/~scottm/cs307/handouts/Eclipse%20Help/ensureJavaFiles.jpg
There are a lot of ways to do this one is to use Gradle is the recommended way, something like this will work Creating runnable JAR with Gradle
I am new to eclipse and I have a general question about referencing external Jar files.
I went to the buildpath -> configure build path and added my two jar files that I wanted to reference as parts of an external library but I can seem to make an instance object of the classes in that jar.
And also I tried just copy and pasting the jar files to the extension folder of the standard library too but this also doesn't work.
How can I use the instance objects of the classes included in these jar files?
Even if you build path to external JARs you have to import the required classes because they do not actually exist inside the same package you are working at.
if u want to add external jars into eclipse follow these steps
Rightclick on project - Select Configure Build Path... and the project properties window will appear showing your build path configurations.
Click Add Variable --Click Configure Variables
Click New -Type a name for the new variable.--Browse to the directory that contains the JAR for the path.
Click Ok to define the variable.--Click Ok to close the preferences dialog.
Select the variable from the list.--Click Extend..
Select the JAR(s) that you want to add to the classpath.--Select the JAR(s) that you want to add to the classpath.-Click Ok to close the new classpath variable dialog.
If you already added jar file into classpath and if it doesn't work I would try below on command prompt
java -classpath example.jar;
When I try to make an executable jar in netbeans I get this error
C:\lwjgl\lwjgl-2.8.5\res is a directory or can't be read. Not copying the libraries. Not copying the libraries.The res folder holds files like jpgs and wavs that the program relies on to function. I'm using lwjgl, would that be part of the problem? What could be causing this?
try this
Right click on your project folder and click on >>>>clean and
build<<<<
right click on your project folder click on >>>Properties<<<< you
should see the location of your project folder normally this should
be in your documents folder under NetbeansProject folder. locate
your project name folder inside is a folder called >>>dist<<< in
there you should find your project name with a small java cafe
image which is your jar file.
I have Java code managed by a Git repository. Currently, the directory structure is
myProject |
-- src
-- bin
-- lib
-- .git
Currently, each developer creates its own development environment under his desired tool (Eclipse/Netbeans). I would like to create a Eclipse project for this code and add it to my source repository, so that new Eclipse developers don't need to create a new project and set the dev environment manually. I'd like to have this:
myProject
|
-- src
-- bin
-- lib
-- .git
-- eclipse
|
-- .settings/
-- .project
-- .classpath
From what I've read in the web, I don't need to add the .metadata directory to the repository. Also, I know I could have dependency problems in some situations if I add the .classpath folder to the repository, but I prefer to not support these problematic situations (eg different Java compilers) than forcing the dev to manually set the classpath. Finally, I don't want to use Maven in this project.
Concisely, my requirements are
- I don't want to put Eclipse project files in the root folder
- I don't want to duplicate the code inside eclipse folder (that's what happens when I try to import existing code into an isolated project folder). I want it to reference the source files I have in the folder named 'src'
- I want to configure Eclipse to put the compilation output (.class files) in the 'bin' folder.
That latter item I was able to set when creating the project, but I wasn't able to configure Eclipse to reference the source code (not duplicate it) without choosing a source parent directory as the project folder.
Any help is much appreciated.
You will need to create a project in the place you want it, and then use 'linked source' directories to point to your actual source code.
more information:
Store eclipse .project files outside the project directory
Create your directory structure above with the eclipse subdirectory.
Create a new Dynamic Web Application (or whatever, assuming based on .settings)
Uncheck Use default location and specify your eclipse directory, hit Next
Remove the lone source folder
Leave Generate web.xml... unchecked
File > New > Folder and click Advanced>>
Use Link to alternate location (Linked Folder) to create src and bin directories that are linked to the top-level src and bin.
Right-click on the project and use File > New > Source folder to add the linked src folder with an output directory of bin
Move WebContent to WebContent.bak and create a new WebContent directory that is linked to the top level.
Move the contents of WebContent.bak to WebContent
Manually edit eclipse/.settings/org.eclipse.wst.common.component to change WebContent.bak to WebContent (is there a setting for this? couldn't find it)
Refresh the project
Right-click the project and select Java EE Tools > Generate Deployment Descriptor Stub
I have created several .java files. All of them are located in one directory. I used a text editor to write these files. Now I want to switch to Eclipse. How can I do it? I have tried many ways. None of them works.
ADDED:
I think the common way is to have source in the eclipse folder called "workspace". So, how do I get my files in these directory. Should I use eclipse to create a new project from existing source and Eclipse will put all file to the workspace? Or I should manually copy all my files to the workspace? Where should I put my class files than? Should I create a subdirectory? With which name?
ADDED 2:
When I try to create a project with name "game", the eclipse writes me that a project with such name already exist. But how can I open this project?
ADDED 3:
In my "workspace" I have created a subdirectory called "game". I copied all my .java file into this subdirectory. Then with Eclipse I created a new project with the name game. As a result, Eclipse created .classpath and .project files in the directory "game". It also created bin and src subdirectories. And now I think it is not the correct way to go. The source files are supposed to be in the "src" directory. Right? And at the moment all my .java files are in the "workspace\game".
ADDED 4:
I did it other way around. With Eclipse I have created a new project with the name "game". As the result, Eclipse created a folder called "game" into folder "workspace". In "game" the folder I found "src" folder. I copied all my .java files into this folder. But now in the "Package Explorer" I cannot open "src" folder. So, how can I access my source files from Eclipse? Why Eclipse does not want to open the "src" folder?
Easiest Method:
Put all source files into one directory named after your project. i.e. "ProjectName" You can keep this directory in your workspace or it can be somewhere else.
Start a new project in eclipse and name it using that same project name.
Uncheck the "use default location" box and find the directory where your project is unless your project is already in the workspace - then you must not uncheck the "use default location" box
Click 'next'.
Eclipse should be smart enough to figure out what's going on. After clicking next, it will show you all of the files it found in that directory. It will just automatically add those files to your project. Voilà!
Right-click in the package explorer and select New - Java Project
Create the new project Game
Open the new project in the package explorer - you should see only the source folder called src (there's nothing inside yet)
Open a file Explorer (e.g. Windows Explorer) and drag your sources
Drag them to Eclipse and drop them inside the new src folder - if asked select "Copy files"
Eclipse should put the files into the default package, if that's not correct you can edit the offending files (marked with a red cross) by opening them in Eclipse, selecting the package declaration (usually line 1), pressing Ctrl + 1 and selecting the appropriate option (e.g. "Move xy to package com.game"
This answer is going to be for the question
How to create a new eclipse project and add a folder or a new package into the project,
or how to build a new project for existing java files.
Create a new project from the menu
File->New-> Java Project
If you are going to add a new pakcage, then create the same package name here by
File->New-> Package
Click the name of the package in project navigator, and right click, and import...
Import->General->File system (choose your file or package)
this worked for me I hope it helps others.
Thank you.
The easiest method is really good but you don't get a standard Java project, i.e., the .java and .class files separated in different folders.
To get this very easily:
Create a folder called "ProjectName" on the workspace of Eclipse.
Copy or move your folder with the .java files to the "ProjectName" folder.
Create a new Java Project called "ProjectName" (with the Use default location marked).
Press <Enter> and that's it.
There are two things
1- If its already a Eclipse Project, then simply go to File->Import->General->Existing Project into Workplace
2- Otherwise define project type e.g. Java, Web etc
Create a new project of type you define into your workplace. Copy Paste source , lib and other necessary files. refresh, compile and run project in eclipse.
In the package explorer and the navigation screen you should now see the project you created. Note that eclipse will not copy your files, it will just allow you to use the existing source and edit it from eclipse.
There are several ways to add files to an existing Java project in Eclipse. So lets assume you have already created the Java project in Eclipse (e.g. using File -> New -> Project... - and select Java project).
To get Java files into the new project you can do any of the following. Note that there are other ways as well. The sequence is my preference.
Drag the files into the Navigator view directly from the native file manager. You must create any needed Java packages first. This method is best for a few files in an existing Java package.
Use File -> Import... - select File System. Here you can then select exactly which files to import into the new project and in which Java package to put them. This is extremely handy if you want to import many files or there are multiple Java packages.
Copy the fires directly to the folder/directory in the workspace and then use File -> Refresh to refresh the Eclipse view of the native system. Remember to select the new project before the refresh.
The last one is what you did - minus the refresh...
While creating a project from a full folder may or may not work within the workspace, there's a condition outside of the workspace that prevents starting a new project with a full folder.
This is relevant if you use numerous folder locations for sources, for example an htdocs or www folder for web projects, and a different location for desktop Java applications.
The condition mentioned occurs when Eclipse is told to create a new project, and given a full folder outside the workspace. Eclipse will say the folder isn't empty, and prevent creating a new project within the given folder. I haven't found a way around this, and any solution requires extra steps.
My favorite solution is as follows
Rename the full folder with an appended "Original" or "Backup.
Create the Eclipse project with the name of the full folder before the folder was renamed.
Copy all the relabeled full folders contents into the new project folder.
Eclipse should make a new project, and update that project with the new folder contents as it scans for changes. The existing sources are now part of the new project.
Although you had to perform three extra steps, you now have a backup with the original sources available, and are also able to use a copy of them in an existing project. If storage space is a concern, simply move/cut the source rather than fully copy the original folder contents.
If you creating a new project based on an existing Maven structure :
Create the project using a general project wizard and give the project the same name as just created.
If you try to create the project as a Maven project via m2e will receive an error that project/pom already exists.
Create a new project..
Right Click on your project..
Select Build path --> Configure Build Path
Under source tab choose link source, your .java files containing folder..
I am suggesting this since none of the methods that you tried have worked ---FYI
Follow this instructions from standard eclipse docs.
From the main menu bar, select command link File > Import.... The Import wizard opens.
Select General > Existing Project into Workspace and click Next.
Choose either Select root directory or Select archive file and click the associated Browse to locate the directory or file containing the projects.
Under Projects select the project or projects which you would like to import.
Click Finish to start the import.