The URI class is an immutable representation of a Uniform Resource Identifier or URI. A URI is a generalization of the URLs or Uniform Resource Locators used on the world wide web. The URI supports parsing and textual manipulation of URI strings, but does not have any direct networking capabilities the way that the URL class does. The advantages of the URI class over the URL class are that it provides more general facilities for parsing and manipulating URLs than the URL class, that it can can represent relative URIs which do not include a scheme (or protocol), and that it can manipulate URIs that include unsupported or even unknown schemes.

Obtain a URI with one of the constructors, which allow a URI to be parsed from a single string, or allow the specification of the individual components of a URI. These constructors can throw URISyntaxException, which is a checked exception. When using hard-coded URIs (rather than URIs based on user input) you may prefer to use the static create( ) method which does not throw any checked exceptions.

Once you have created a URI, object you can use the various get methods to query the various portions of the URI. The getRaw( ) methods are like the get( ) methods except that they do not decode hexadecimal escape sequences of the form %xx that appear in the URI. normalize( ) returns a new URI object that has “.” and unnecessary “..” sequences removed from its path component. resolve( ) interprets its URI (or string) argument relative ...

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