Load a file from src folder into a reader

Question

I would like to know how can I load a file `lol.txt` from `src` folder into my close method. The code so far: ``` public void close() throws IOException { boolean loadFromClasspath = true; String fileName = "..."; // provide an absolute path here to be sure that file is found BufferedReader reader = null; try { if (loadFromClasspath) { // loading from classpath // see the link above for more options InputStream in = getClass().getClassLoader().getResourceAsStream("lol.txt"); reader = new BufferedReader(new InputStreamReader(in)); } else { // load from file system reader = new BufferedReader(new FileReader(new File(fileName))); } String line = null; while ( (line = reader.readLine()) != null) { // do something with the line here System.out.println("Line read: " + line); } } catch (IOException e) { JOptionPane.showMessageDialog(null,e.getMessage()+" for lol.txt","File Error",JOptionPane.ERROR_MESSAGE); } finally { if (reader != null) { reader.close(); } } } ``` Console error output on i…

Accepted Answer

If you like to load the file from inside a jar file (i.e. from classpath) please see this answer for more options on how to get an `InputStream`. In the code below I have left-out exception handling and removed your `Random` related code.

```
public void close() {
    boolean loadFromClasspath = true;
    String fileName = "..."; // provide an absolute path here to be sure that file is found
    BufferedReader reader = null;
    try {
        
        if (loadFromClasspath) {
            // loading from classpath
            // see the link above for more options
            InputStream in = getClass().getClassLoader().getResourceAsStream("absolute/path/to/file/inside/jar/lol.txt"); 
            reader = new BufferedReader(new InputStreamReader(in));
        } else {
            // load from file system
            reader = new BufferedReader(new FileReader(new File(fileName)));
        }

String line = null;
        while ( (line = reader.readLine()) != null) {
            // do something with the line here
            System.out.println("Line read: " + line);
        }
    } catch (IOException e) {
        JOptionPane.showMessageDialog(null,e.getMessage()+" for lol.txt","File Error",JOptionPane.ERROR_MESSAGE);
    } finally {
        if (reader != null) {
            reader.close();  
        }
    }
}
```

Edit: It seems that you are either doing something wrong with your folder structure or you are using a wrong package/file name. Just to be clear. At the moment you seem to have a class called `main` under a `main` package. Your folder structure should be something like this:

```
+ src/
   + main/
      main.java
      lol.txt
```

When you compile, your lol.txt file (btw those are lowercase L's not the digit 1 right?) should be copied under `/bin/main/` folder

If this is the case then use the code like this: `InputStream in = getClass().getClassLoader().getResourceAsStream("main/lol.txt");`

If your folder structure is different please change accordingly

Load a file from src folder into a reader

Solution

Problem