Подскажите что не так?

private int maxSize = Integer.MAX_VALUE;

if (file.toFile().length() >= maxSize)
    return FileVisitResult.CONTINUE;

public class SearchFileVisitor extends SimpleFileVisitor<Path> {
    private String partOfName = "";
    private String partOfContent = "";
    private int minSize;
    private int maxSize;
    private List<Path> foundFiles = new LinkedList<>();

    @Override
    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
        if (!file.getFileName().toString().contains(partOfName))
            return FileVisitResult.CONTINUE;
        if (file.toFile().length() <= minSize && minSize != 0)
            return FileVisitResult.CONTINUE;
        if (file.toFile().length() >= maxSize && maxSize != 0)
            return FileVisitResult.CONTINUE;
        if (!(new String(Files.readAllBytes(file))).contains(partOfContent))
            return FileVisitResult.CONTINUE;

        foundFiles.add(file);
        return FileVisitResult.CONTINUE;
    }

    public void setPartOfName(String partOfName) {
        this.partOfName = partOfName;
    }

    public void setPartOfContent(String partOfContent) {
        this.partOfContent = partOfContent;
    }

    public void setMinSize(int minSize) {
        this.minSize = minSize;
    }

    public void setMaxSize(int maxSize) {
        this.maxSize = maxSize;
    }

    public List<Path> getFoundFiles() {
        return foundFiles;
    }
}

if (file.toFile().length() >= maxSize && maxSize != 0)
    return FileVisitResult.CONTINUE;

file.toFile().length() >= maxSize

maxSize != 0 (при не заданном тут будет сразу false)

file.toFile().length()

attrs.size()