Suppose a very simple program that lists out all the subdirectories of a given directory. Sound simple enough? Except the only way to list all subdirectories in Java is to use FilenameFilter combined

public static <T, E> Set<T> getKeysByValue(Map<T, E> map, E value) {
return map.entrySet()
.stream()
.filter(entry -> Objects.equals(entry.getValue(), value))
.map(Map.Entry::getKey)
.collect(Collectors.toSet());
}

Learn to use AES-256 bit encryption to create secure passwords and decryption for password validation in Java, with examples.

A lot of applications handle files in some way and file manipulation is one of the core knowledges in any programming language. In order to manipulate files,...