 | Chapter Summary
(See related pages)
- The char data type represents a single character.
- The char constant is denoted by a single quotation mark, for example, ‘a’.
- The character coding scheme used widely today is ASCII (American Standard Code for Information Exchange).
- Java uses Unicode, which is capable of representing characters of diverse languages. ASCII is compatible with Unicode.
- Astring is a sequence of characters, and in Java, strings are represented by String objects.
- The Pattern and Matcher classes are introduced in Java 2 SDK 1.4. They provide support for pattern-matching applications.
- Regular expression is used to represent a pattern to match (search) in a given text.
- The String objects are immutable. Once they are created, they cannot be changed.
- To manipulate mutable strings, use StringBuffer.
- Strings are objects in Java, and the rules for comparing objects apply when comparing strings.
- Only one String object is created for the same literal String constants.
- The standard classes described or used in this chapter are
| String | | Pattern | | StringBuffer | | Matcher |
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