How to read a text file from JAR

If you want to read a text file from JAR file (read only), you have to:

• Include the txt file in your project, so the IDE can append it to the JAR package.
• Use the following code to read a text file from the JAR

private String readTextFile(String fileName) throws IOException {
 
    InputStream input = getClass().getResourceAsStream(fileName);
    ByteArrayOutputStream output = new ByteArrayOutputStream(1024);
 
    byte[] buffer = new byte[512];
 
    int bytes;
 
    while ((bytes = input.read (buffer)) > 0) {
        output.write (buffer, 0, bytes);
    }
 
    input.close ();
    return new String(output.toByteArray());
}