77 lines
5.8 KiB
HTML
77 lines
5.8 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="IFSFile class" />
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<meta name="abstract" content="The IFSFile class represents an object in the iSeries integrated file system." />
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<meta name="description" content="The IFSFile class represents an object in the iSeries integrated file system." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="ifsfile" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>IFSFile class</title>
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</head>
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<body id="ifsfile"><a name="ifsfile"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">IFSFile class</h1>
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<div><p>The IFSFile class represents an object in the iSeries™ integrated
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file system. </p>
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<div class="section"><p><a href="javadoc/com/ibm/as400/access/IFSFile.html#NAVBAR_TOP">IFSFile</a> </p>
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<p>The methods on IFSFile represent operations
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that are done on the object as a whole. You can use IFSFileInputStream, IFSFileOutputStream,
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and IFSRandomAccessFile to read and write to the file. The IFSFile class
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allows the Java™ program to do the following:</p>
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<ul><li>Determine if the object <a href="javadoc/com/ibm/as400/access/IFSFile.html#EXISTS()">exists</a> and is a <a href="javadoc/com/ibm/as400/access/IFSFile.html#ISDIRECTORY()">directory</a> or a <a href="javadoc/com/ibm/as400/access/IFSFile.html#ISFILE()">file</a></li>
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<li>Determine if the Java program can <a href="javadoc/com/ibm/as400/access/IFSFile.html#CANREAD()">read from</a> or <a href="javadoc/com/ibm/as400/access/IFSFile.html#CANWRITE()">write to</a> a file</li>
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<li>Determine the <a href="javadoc/com/ibm/as400/access/IFSFile.html#LENGTH()">length</a> of a file</li>
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<li>Determine the <a href="javadoc/com/ibm/as400/access/IFSFile.html#GETPERMISSION()">permissions</a> of an object and <a href="javadoc/com/ibm/as400/access/IFSFile.html#SETPERMISSION(COM.IBM.AS400.ACCESS.PERMISSION)"> set</a> the permissions of an object</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFile.html#MKDIR()">Create</a> a directory</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFile.html#DELETE()">Delete</a> a file or directory</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFile.html#RENAMETO(COM.IBM.AS400.ACCESS.IFSFILE)">Rename</a> a file or directory</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFile.html#LASTMODIFIED()">Get</a> or <a href="javadoc/com/ibm/as400/access/IFSFile.html#SETLASTMODIFIED(LONG)">set</a> the last modification date of a file</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFile.html#LIST()">List</a> the contents of a directory</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFile.html#LISTFILES()">List</a> the contents of a directory and save the attribute
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information to a local cache</li>
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<li>Determine the amount of <a href="javadoc/com/ibm/as400/access/IFSFile.html#GETFREESPACE()">space available</a> on the system</li>
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<li>Determine the <a href="javadoc/com/ibm/as400/access/IFSFile.html#GETSUBTYPE()">type of the file object</a> when it is in the QSYS.LIB file
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system</li>
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</ul>
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<div class="p" id="ifsfile__listfiles2829method"><a name="ifsfile__listfiles2829method"><!-- --></a>You can get the list of files in a directory
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by using either the <a href="javadoc/com/ibm/as400/access/IFSFile.html#LIST()">list() method</a> or the <a href="javadoc/com/ibm/as400/access/IFSFile.html#LISTFILES()">listFiles() method</a>:<ul><li>The listFiles() method caches information for each file on the initial
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call. After calling listFiles(), using other methods to query file details
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results in better performance because the information is retrieved from the
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cache. For example, calling isDirectory() on an IFSFile object returned from
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listFiles() does not require a call to the server.</li>
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<li>The list() method retrieves information about each file in a separate
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request to the server, making it slower and more demanding of server resources.</li>
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</ul>
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<div class="note"><span class="notetitle">Note:</span> Using listFiles() means that the information in the cache may
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eventually become stale, so you may need to refresh the data by calling listFiles()
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again.</div>
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</div>
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</div>
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<div class="section"><h4 class="sectiontitle">Examples</h4><p>The following examples show how to use
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the IFSFile class:</p>
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<ul><li><a href="ifsfileexamples.htm#ifsfileexamples__creatingadirectory">Example: Creating a directory</a></li>
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<li><a href="ifsfileexamples.htm#ifsfileexamples__trackingerrors">Example: Using IFSFile exceptions to track errors</a></li>
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<li><a href="ifsfileexamples.htm#ifsfileexamples__listingtxtfiles">Example: Listing files with a .txt extension</a></li>
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<li><a href="ifslistfilezexample.htm#ifslistfilezexample">Example: Using the IFSFile listFiles() method to list the contents of a directory</a></li>
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</ul>
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</div>
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</div>
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</body>
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</html>
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