Why Can\'t My Java Program Find \'word.txt\'?

Trouble with Unexplained FileNotFoundException?

When attempting to access a file named "word.txt" within the same directory as a Java file, users may encounter the perplexing "java.io.FileNotFoundException: the system cannot find the file specified" error. This baffling issue can have nuanced causes, making troubleshooting a challenge.

The Problem's Root

The code snippet responsible for triggering the error attempts to create a Scanner object using a FileInputStream. The problem resides in the fact that the file path within the FileInputStream is relative to the working directory. By default, the working directory is set as the current directory where the Java Virtual Machine (JVM) is executed from.

The Solution: Placing the File Strategically

To resolve the issue, position the word.txt file as a direct child of the project root folder, alongside the src directory. This arrangement ensures that the file exists relative to the working directory and can be accessed using its simple file name.

Project Structure:

Project_Root
    src
    word.txt

Cautionary Notes:

While this solution works for this specific instance, it's crucial to understand why this approach may not prove effective in other scenarios.

Potential Mishaps:

• Working Directory Variability: The working directory can change during execution, leading to the failure of the file path.
• Resource Inclusion in JAR: Exporting the project as a JAR may exclude the word.txt file, resulting in file path issues.

Alternative Approaches: Embedded Resources

If the word.txt file needs to be embedded into the classpath as an embedded resource, it must be explicitly included during the build process. Once embedded, classpath resources can be accessed using methods like getResourceXxx provided by the Class class or by obtaining an URL using getResource().

Example:

InputStream is = Hangman1.class.getResourceAsStream("/resources/word.txt");
BufferedReader reader = new BufferedReader(new InputStreamReader(is));

Conclusion:

Resolving "FileNotFoundException" errors can be intricate. By understanding the concept of the working directory and considering factors such as resource embedding, developers can effectively manage file access and avoid this common pitfall.

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