Though Java already has a character type and char keyword to represent and manipulate characters, the language also requires a Character class for two reasons: Character c1 = new Character ('A'); ...

What are the numbers? You can encode 9,999,999,999 in 5 bytes. If you want to store the number in human readable bytes, convert it to Base64 encoding or similar.

Java’s String class encapsulates an array of bytes. A byte can be converted to a char, in which case, String becomes an array of characters used to compose words, sentences, or any other data you want ...