Java 1.8 compilation error for lastmodified

Question

File lastModified = Arrays.stream(files)
    .filter(File::isDirectory)
    .max(Comparator.comparing(File::lastModified))
    .orElse(null)

Can the above code changed to be compatible for 1.7?

Answer 1

Provided files instanceof File[], it should be smth like that:

private static File getFileLastModified(File[] files) {
    File fileLastModified = null;
    long maxLastModified = Long.MIN_VALUE;
    for (File file : files) {
        if (file.isDirectory()) {
            final long lastModified = file.lastModified();
            if (lastModified > maxLastModified) {
                fileLastModified = file;
                maxLastModified = lastModified;
            }
        }
    }
    return fileLastModified;
}

In short, it tries to find the last modified file.