An Array of Characters is Not a String

• In the Java programming language, unlike C, an array of char is not a String, and neither a String nor an array of char is terminated by '\u0000' (the NULL character)
• A String object is immutable, that is, its contents never change, while an array of char has mutable elements.
• The method toCharArray in class String returns an array of characters containing the same character sequence as a String. The class StringBuffer implements useful methods on mutable arrays of characters.