When I am trying to create a new web application project using maven, I am getting duplicate src folder in the project directory structure. Is it expected or I am doing anything wrong?
If it is expected why is it creating two directories with the same name, Is there any specific reason?
It's not creating two directories with the same name. Just check with your explorer, or the command line.
It's just Eclipse showing two different views (one as a directory of the project, one as a Java resource directory) of the same directory.
They both are same. Only thing is your IDE is showing first one in Java build path format and other one as normal. If you go to folder structure you would notice that they are physically same path.
This happens when the folder structure in the build path.
But still since your IDE is differentiating them, use the first one in the picture -> src/main/resources
Related
I'm working on a framework-type project in Eclipse, that has a res folder attached with, as you guessed Resources inside of it. At the moment, they are crucial text-files that are to be read.
I also have a main test rig that is apart of it's own Eclipse project, as I plan to expand it in the future. This test rig has included the framework project on it's Build Path, so I can access classes from the framework as they are added.
But this is where my problems lie: If I want to import a class, that works fine. If I want to access a file through an InputStream, or Reader, it breaks. I know this is because the files included from the secondary project aren't placed inside the test rigs bin folder, rather they reside in their own bin in the other project.
Is there a way I can get my main project to access resources from the other without having to do ../../ trickery in my file paths? I plan on making this a real thing and don't want file paths doing things like that.
In eclipse do this,
Build Path ---> Configure Path ----> Click Project Tab ---> Add the project.
Also, you can package the other project in a jar and import it as an external jar.
I have downloaded some source code that contains src folders with some .java files. I want to try to run the code in netbeans.
This is the structure of the folder :
C4.5/src/main/java/myc45/
and in these folder include some .java files.
What should I do first?
When you create a project in Netbeans, one of the options in the project creation window is create project from existing source. If you have an existing project, you can also edit the project properties and tell it what the source folders are.
As an alternative to #PaulJAbernathy 's solution:
create a new project in Netbeans
via the projects windows, create a package myc45 (the package name used in the code you want to import) - you can do so by rightclicking, new Package
now, inside the src directory of your project directory you'll find a directory called myc45. Drop the source files into that directory using whatever file browser you commonly use. You'll see that Netbeans picks up the files almost immediately in the project explorer.
you can now use the code.
A bit messy, but there are advantages: if eg you want to transform a bunch of existing code files into a Maven type project, this is probably the easiest way.
I have an Eclipse project, which has two source folders - 'src', and 'test'. I would like the build from both these folders to go into separate output folders.
The reason being, both these folders have a property file called ServiceProviders.properties which has different values for production and test runs of the code.
The problem is, since there is only one output folder where all compiled classes are copied, the properties file in 'test' does not get copied, and as a result my test code gets the production version of the properties file. I guess I am trying to simulate the way we can have different classpaths in Maven (and their lookup order).
If this does not work, I will use a JVM property to specify certain values which I can use in the test case. However, it does not seem like an elegant solution.
Using Maven will get this to work, but I cannot use Maven in this project.
Update 1:
Thanks for both the answers. Since they were identical, I have accepted the one which was posted earlier.
Upadte 2:
Even though I could get multiple output folders for corresponding source folders, it did not solve my original problem which was to load a ServiceProviders.properties from test when I run test cases, and the one from src when I run the app on a server from Eclispe. The way I got it to work is by creating a separate jar file with ServiceProviders.properties file from the test folder. In the run configuration of my test cases, I add this jar file and change the order, so it appears as the first dependency for lookup.
Yes it can, i just have checked that.
If you go into Properties of your Project, and there to Java Build Path, where you choose your different Source-Folders, there also is an option called "Allow output folders for source folders", which, if checked adds an editable output-folder for each of your source-folders.
just select it and click the edit-button and you're fine
Easy: click "Allow output folders for source folders" on the Java Build Path | Source tab. Then, when you expand each folder's settings, you get "Output folder"
In the PackageExplorer view click on the source folder and select "Configure Output Folder..." You can now configure the output folder separately for each source folder.
When I export my code as runnable JAR from eclipse all the files that I've set it to grab such as button images and other files are missing even though they are actually in the JAR. I've added getClass().getResource in front of the files but then when I try to run the JAR nothing even happens, any suggestions?
Seems like you not putting your stuff in the right sense. In order to make it work, follow these steps :
Right-Click your Project in Project Explorer Tree.
Go to New -> Source Folder and then provide any Name to the Source Folder.
Now manually add your stuff to this Source Folder so created by you, like if you want to add images then make a New Folder, by manually visiting this Source Folder through File System.
Name this New Folder as images and copy your images to this Folder.
Now go back to your Eclipse IDE and Refresh your Project from the Project Explorer, by Right Clicking your Project, here you be able to see your added content now after refreshing.
Now in order to access, say any image, you will use.
getClass().getResource("/images/yourImageName.extension");
which will return one URL object. Do remember the first forward slash, in this case, since whatever is inside your Source Folder is accessed with the help of this, in simpler terms. Now when you will Run your project, the content of this Source Folder will be automatically added to the bin folder and when you will create a Runnable Jar, then the stuff inside your Source Folder can be accessed as it is.
The path needs to be right for the resource.
For "foo.gif" being at the root of the jar, you must refer to it using "/foo.gif".
If the program works correctly after a complete clean and rebuild, but fails as a jar, you most likely do not have the files included in the jar.
Try to put the folders in the jar the same way that you got them in the program. Put in the same resources in the same places that you have them in the project. The jar will reference to them the same way as in your compiler did.
You need to get the images using stream like this -
this.class.getClassLoader().getResourceAsStream("test.jpg") and make sure the images are present in the jar which you are referencing.
As nIcE cOw said, you just need to create a Source Folder in you Project Explorer Tree.
All the files inside that folder will be in the root project folder.
To refer to them, you must write your projects name slash the file name as it:
getClass().getResource("ProjectName/image.extension");
I hope this helps!
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.