skylot/jadx · error · FileNotFoundException

{}

Error message

{}

What it means

This file:line (ZipReader.open, the FileNotFoundException branch) is the source anchor, but the literal '{}' placeholder message corresponds to the FileNotFoundException thrown when zipFile.exists() is false: 'throw new FileNotFoundException(zipFile.getAbsolutePath())'. It fires before any parsing attempt when the input file does not exist on disk.

Source

Thrown at jadx-commons/jadx-zip/src/main/java/jadx/zip/ZipReader.java:45

		this(ZipReaderOptions.getDefault());
	}

	public ZipReader(Set<ZipReaderFlags> flags) {
		this(new ZipReaderOptions(new JadxZipSecurity(), flags));
	}

	public ZipReader(IJadxZipSecurity security) {
		this(new ZipReaderOptions(security, ZipReaderFlags.none()));
	}

	public ZipReader(ZipReaderOptions options) {
		this.options = options;
	}

	@SuppressWarnings("resource")
	public ZipContent open(File zipFile) throws IOException {
		if (!zipFile.exists()) {
			throw new FileNotFoundException(zipFile.getAbsolutePath());
		}
		try {
			JadxZipParser jadxParser = new JadxZipParser(zipFile, options);
			IZipParser detectedParser = detectParser(zipFile, jadxParser);
			return detectedParser.open();
		} catch (FallbackException e) {
			throw e;
		} catch (Exception e) {
			if (options.getFlags().contains(ZipReaderFlags.DONT_USE_FALLBACK)) {
				throw new IOException("Failed to open zip: " + zipFile, e);
			}
			// switch to fallback parser
			return buildFallbackParser(zipFile).open();
		}
	}

	/**
	 * Visit valid entries in a zip file.

View on GitHub (pinned to e738a26571)

Solutions

1. Verify the path exists with Files.exists before calling open.
2. Use an absolute path to avoid working-directory ambiguity.
3. Check spelling and case of the filename on case-sensitive OS.
4. Confirm removable/network mounts are attached.

Example fix

// before
new ZipReader(security).open(new File("input.apk"));
// after
File f = new File("/abs/path/input.apk");
if (!f.exists()) throw new IllegalArgumentException("missing: " + f);
new ZipReader(security).open(f);

File f = ...;
if (!f.exists() || !f.isFile()) {
    throw new IllegalArgumentException("Zip input does not exist or is not a file: " + f.getAbsolutePath());
}

public static boolean isExistingZip(File f) {
    return f != null && f.isFile() && f.exists();
}

try {
    zipReader.open(file);
} catch (FileNotFoundException e) {
    System.err.println("Input not found: " + e.getMessage());
    // prompt for correct path
}

When it happens

Trigger: Calling ZipReader.open(file) (or any API that opens a zip) with a File whose exists() returns false. The absolute path is included in the exception message.

Common situations: Wrong input path; relative path resolved against an unexpected working directory; file deleted between listing and open; case-sensitivity mismatch on case-sensitive filesystems; network/removable mount not attached.

Related errors

• Failed to open zip: {}
• Failed to process zip file: {}
• Failed to process zip entry: {}
• Failed to save JSON file: {}
• Failed to save JSON file: {}

AI-assisted analysis of skylot/jadx@e738a26571 (2026-08-14). Data as JSON: /api/errors/0fe247ba110122d0. Report an issue: GitHub.