Java 101: Java’s character and assorted string classes support text-processing

Text can represent a combination of digits, letters, punctuation, words, sentences, and more. Computer programs that process text need assistance (from their associated languages) to represent and manipulate text. Java provides such assistance through the Character, String, StringBuffer, and StringTokenizer classes. In this article, you’ll create objects from these classes and examine their various methods. You’ll also receive answers to three mysteries: why Java regards a string literal as a String object, why String objects are immutable (and how immutability relates to string internment), and what happens behind the scenes when the string concatenation operator concatenates two strings into a single string.

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