<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Exception Handling</title> <link rel="stylesheet" href="gettingStarted.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Getting Started with Berkeley DB" /> <link rel="up" href="introduction.html" title="Chapter 1. Introduction to Berkeley DB" /> <link rel="prev" href="databaseLimits.html" title="Database Limits and Portability" /> <link rel="next" href="returns.html" title="Error Returns" /> </head> <body> <div xmlns="" class="navheader"> <div class="libver"> <p>Library Version 12.1.6.1</p> </div> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Exception Handling</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="databaseLimits.html">Prev</a> </td> <th width="60%" align="center">Chapter 1. Introduction to Berkeley DB </th> <td width="20%" align="right"> <a accesskey="n" href="returns.html">Next</a></td> </tr> </table> <hr /> </div> <div class="sect1" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title" style="clear: both"><a id="coreExceptions"></a>Exception Handling</h2> </div> </div> </div> <p> Before continuing, it is useful to spend a few moments on exception handling in DB with the <span>java</span>. </p> <p> <span>Most</span> DB methods throw <code class="classname">DatabaseException</code> in the event of a serious error. <span> So your DB code must either catch this exception or declare it to be throwable. Be aware that <code class="classname">DatabaseException</code> extends <code class="classname">java.lang.Exception</code>. For example: </span> </p> <a id="java_intro1"></a> <pre class="programlisting">import com.sleepycat.db.DatabaseException; ... try { // DB and other code goes here } catch(DatabaseException e) { // DB error handling goes here } </pre> <p> You can obtain the DB error number for a <code class="classname">DatabaseException</code> by using <span> <code class="methodname">DatabaseException.getErrno()</code>. You can also obtain any error message associated with that error using <code class="methodname">DatabaseException.getMessage()</code>. </span> </p> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="databaseLimits.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="introduction.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="returns.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">Database Limits and Portability </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> Error Returns</td> </tr> </table> </div> </body> </html>