24.2. Manipulating URLs
The Internet offers many protocols. The Hypertext Transfer Protocol (HTTP), which forms the basis of the World Wide Web, uses URIs ( Uniform Resource Identifiers) to identify data on the Internet. URIs that specify the locations of documents are called URLs (Uniform Resource Locators). Common URLs refer to files or directories and can reference objects that perform complex tasks, such as database lookups and Internet searches. If you know the HTTP URL of a publicly available HTML document anywhere on the web, you can access it through HTTP.
Java makes it easy to manipulate URLs. When you use a URL that refers to the exact location of a resource (e.g., a web page) as an argument to the showDocument method of interface ...
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