Editing Object REXX (section)

=== Stream classes ===
Stream classes facilitate communication with external objects such as files, queues, [[Serial port|serial interfaces]], devices, etc. The <code>Stream</code> class itself is a mixin class that can be inherited and is a subclass of the <code>InputOutputStream</code>, <code>InputStream,</code> and <code>OutputStream</code> classes.<ref name=":2" />

The <code>Stream</code> class provides methods for opening, reading, writing, and closing streams and flushing buffers, setting the file location, retrieving information, and other stream-related operations. While the <code>OPEN</code> method opens the stream, the <code>ARRAYIN</code> method can be used to read its content into an array object. The <code>CLOSE</code> method explicitly closes a stream before the stream object is reclaimed by the [[Garbage collection (computer science)|garbage collector]].<ref name=":2" /><ref name=":9" /><syntaxhighlight lang="oorexx" style="background-color: #ffffff; !important" line="1">
StreamObj = .stream~new("someFile.txt")     /* create stream object */
StreamObj~open                              /* open the stream      */
FileContent = StreamObj~ArrayIn             /* read content         */
StreamObj~close                             /* close the stream     */

say FileContent                             /* outputs content      */
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