94 lines
4.8 KiB
HTML
94 lines
4.8 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8"?>
|
||
|
|
<!DOCTYPE html
|
||
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html lang="en-us" xml:lang="en-us">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="security" content="public" />
|
||
|
|
<meta name="Robots" content="index,follow" />
|
||
|
|
<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))' />
|
||
|
|
<meta name="DC.Type" content="reference" />
|
||
|
|
<meta name="DC.Title" content="Setting the cursor position" />
|
||
|
|
<meta name="abstract" content="" />
|
||
|
|
<meta name="description" content="" />
|
||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
|
||
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
|
||
|
|
<meta name="DC.Format" content="XHTML" />
|
||
|
|
<meta name="DC.Identifier" content="rlacurs" />
|
||
|
|
<meta name="DC.Language" content="en-us" />
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
||
|
|
<title>Setting the cursor position</title>
|
||
|
|
</head>
|
||
|
|
<body id="rlacurs"><a name="rlacurs"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1">Setting the cursor position</h1>
|
||
|
|
<div><p></p>
|
||
|
|
<div class="section"><p>An open file has a cursor. The cursor points to the record to
|
||
|
|
be read, updated, or deleted. When a file is first opened the cursor points
|
||
|
|
to the beginning of the file. The beginning of the file is before the first
|
||
|
|
record. Use the following methods to set the cursor position:</p>
|
||
|
|
</div>
|
||
|
|
<div class="section"><ul><li><a href="javadoc/com/ibm/as400/access/AS400File.html#POSITIONCURSORAFTERLAST()"> positionCursorAfterLast()</a> - Set cursor to after the
|
||
|
|
last record. This method exists so Java™ programs can use the readPrevious()
|
||
|
|
method to access records in the file.</li>
|
||
|
|
<li><a href="javadoc/com/ibm/as400/access/AS400File.html#POSITIONCURSORBEFOREFIRST()"> positionCursorBeforeFirst()</a> - Set cursor to before the
|
||
|
|
first record. This method exists so Java programs can use the readNext() method
|
||
|
|
to access records in the file.</li>
|
||
|
|
<li><a href="javadoc/com/ibm/as400/access/AS400File.html#POSITIONCURSORTOFIRST()"> positionCursorToFirst()</a> - Set the cursor to the first
|
||
|
|
record.</li>
|
||
|
|
<li><a href="javadoc/com/ibm/as400/access/AS400File.html#POSITIONCURSORTOLAST()"> positionCursorToLast()</a> - Set the cursor to the last
|
||
|
|
record.</li>
|
||
|
|
<li><a href="javadoc/com/ibm/as400/access/AS400File.html#POSITIONCURSORTONEXT()"> positionCursorToNext()</a> - Move the cursor to the next
|
||
|
|
record.</li>
|
||
|
|
<li><a href="javadoc/com/ibm/as400/access/AS400File.html#POSITIONCURSORTOPREVIOUS()"> positionCursorToPrevious()</a> - Move the cursor to the
|
||
|
|
previous record.</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
<div class="section"><p>The following example shows how to use the positionCursorToFirst()
|
||
|
|
method to position the cursor.</p>
|
||
|
|
</div>
|
||
|
|
<div class="section"><div class="p"><pre> // Create an AS400 object, the file exists on this
|
||
|
|
// server.
|
||
|
|
AS400 sys = new AS400("mySystem.myCompany.com");
|
||
|
|
|
||
|
|
// Create a file object that represents the file
|
||
|
|
SequentialFile myFile = new SequentialFile(sys, "/QSYS.LIB/MYLIB.LIB/MYFILE.FILE/%FILE%.MBR");
|
||
|
|
|
||
|
|
// Assume that the AS400FileRecordDescription class
|
||
|
|
// was used to generate the code for a subclass of
|
||
|
|
// RecordFormat that represents the record format
|
||
|
|
// of file MYFILE in library MYLIB. The code was
|
||
|
|
// compiled and is available for use by the Java
|
||
|
|
// program.
|
||
|
|
RecordFormat recordFormat = new MYFILEFormat();
|
||
|
|
|
||
|
|
// Set the record format for myFile. This must
|
||
|
|
// be done before invoking open()
|
||
|
|
myFile.setRecordFormat(recordFormat);
|
||
|
|
|
||
|
|
// Open the file.
|
||
|
|
myFile.open(AS400File.READ_WRITE, 1, AS400File.COMMIT_LOCK_LEVEL_NONE);
|
||
|
|
|
||
|
|
// I want to delete the first record of the file.
|
||
|
|
myFile.positionCursorToFirst();
|
||
|
|
myFile.deleteCurrentRecord();
|
||
|
|
|
||
|
|
....
|
||
|
|
|
||
|
|
// Close the file since I am done using it
|
||
|
|
myFile.close();
|
||
|
|
|
||
|
|
// Disconnect since I am done using
|
||
|
|
// record-level access
|
||
|
|
sys.disconnectService(AS400.RECORDACCESS);</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|