[java] Where to put a textfile I want to use in eclipse?

I need to read a text file when I start my program. I'm using eclipse and started a new java project. In my project folder I got the "src" folder and the standard "JRE System Library" + staedteliste.txt... I just don't know where to put the text file. I literally tried every folder I could think off....I cannot use a "hard coded" path because the text file needs to be included with my app...

I use the following code to read the file, but I get this error:

Error:java.io.FileNotFoundException:staedteliste.txt(No such file or directory)

public class Test {

ArrayList<String[]> values;

public static void main(String[] args) {
    // TODO Auto-generated method stub

    URL url = Test.class.getClassLoader().getResource("src/mjb/staedteliste.txt");
    System.out.println(url.getPath()); // I get a nullpointerexception here!
    loadList();
}

public static void loadList() {
    BufferedReader reader;
    String zeile = null;

    try {
        reader = new BufferedReader(new FileReader("src/mjb/staedteliste.txt"));
        zeile = reader.readLine();          

        ArrayList<String[]> values = new ArrayList<String[]>();

        while (zeile != null) {             
            values.add(zeile.split(";"));
            zeile = reader.readLine();
        }
        System.out.println(values.size());
        System.out.println(zeile);

    } catch (IOException e) {
        System.err.println("Error :"+e);
    }
}

}

Just create a folder Files under src and put your file there. This will look like src/Files/myFile.txt

Note: In your code you need to specify like this Files/myFile.txt e.g.

getResource("Files/myFile.txt");

So when you build your project and run the .jar file this should be able to work.

Take a look at this video

All what you have to do is to select your file (assuming it's same simple form of txt file), then drag it to the project in Eclipse and then drop it there. Choose Copy instead of Link as it's more flexible. That's it - I just tried that.

If this is a simple project, you should be able to drag the txt file right into the project folder. Specifically, the "project folder" would be the highest level folder. I tried to do this (for a homework project that I'm doing) by putting the txt file in the src folder, but that didn't work. But finally I figured out to put it in the project file.

A good tutorial for this is http://www.vogella.com/articles/JavaIO/article.html. I used this as an intro to i/o and it helped.

One path to take is to

1. Add the file you're working with to the classpath

2. Use the resource loader to locate the file:

       URL url = Test.class.getClassLoader().getResource("myfile.txt");
       System.out.println(url.getPath());
       ...
   

3. Open it

MJB

Please try this

1. In eclipse "Right click" on the text file u wanna use, see and copy the complete path stored in HDD like (if in UNIX "/home/sjaisawal/Space-11.4-template/provisioning/devenv/Test/src/testpath/testfile.txt")

2. put this complete path and try.

3. if it works then class-path issue else GOK :)

Suppose you have a project called "TestProject" on Eclipse and your workspace folder is located at E:/eclipse/workspace. When you build an Eclipse project, your classpath is then e:/eclipse/workspace/TestProject. When you try to read "staedteliste.txt", you're trying to access the file at e:/eclipse/workspace/TestProject/staedteliste.txt.

If you want to have a separate folder for your project, then create the Files folder under TestProject and then access the file with (the relative path) /Files/staedteliste.txt. If you put the file under the src folder, then you have to access it using /src/staedteliste.txt. A Files folder inside the src folder would be /src/Files/staedteliste.txt

Instead of using the the relative path you can use the absolute one by adding e:/eclipse/workspace/ at the beginning, but using the relative path is better because you can move the project without worrying about refactoring as long as the project folder structure is the same.

You should probably take a look at the various flavours of getResource in the ClassLoader class: https://docs.oracle.com/javase/1.5.0/docs/api/java/lang/ClassLoader.html.

Depending on your Java class package name, you're probably 4 or 5 levels down the directory structure.

If your Java class package is, for example, com.stackoverflow.project, then your class is located at src/com/stackoverflow/project.

You can either move up the directory structure with multiple ../, or you can move the text file to the same package as your class. It would be easier to move the text file.