94 lines
5.8 KiB
HTML
94 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="task" />
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<meta name="DC.Title" content="Debug a Java program" />
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<meta name="abstract" content="The easiest way to debug Java programs that run on your iSeries server is to use the IBM iSeries System Debugger. IBM iSeries System Debugger provides a graphical user interface that enables you to more easily use the debugging capabilities of your iSeries server." />
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<meta name="description" content="The easiest way to debug Java programs that run on your iSeries server is to use the IBM iSeries System Debugger. IBM iSeries System Debugger provides a graphical user interface that enables you to more easily use the debugging capabilities of your iSeries server." />
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<meta name="DC.Relation" scheme="URI" content="debug.htm" />
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<meta name="DC.Relation" scheme="URI" content="debugopt.htm" />
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<meta name="DC.Relation" scheme="URI" content="setbreak.htm" />
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<meta name="DC.Relation" scheme="URI" content="stepping.htm" />
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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="debugpro" />
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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>Debug a Java program</title>
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</head>
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<body id="debugpro"><a name="debugpro"><!-- --></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">Debug a Java program</h1>
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<div><p>The easiest way to debug Java™ programs that run on your iSeries™ server
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is to use the IBM<sup>®</sup> iSeries System
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Debugger. IBM iSeries System
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Debugger provides a graphical user interface that enables you to more easily
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use the debugging capabilities of your iSeries server.</p>
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<div class="section"><p>For more information about using the iSeries System Debugger to debug and
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test Java programs
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that run on your iSeries server,
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see <a href="../rzamq/rzamqmain.htm" target="_blank">IBM iSeries System
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Debugger</a>.</p>
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<p>If you want, you can use the interactive display of
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your server to use the <samp class="codeph">*DEBUG</samp> option to view the source code
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before running the program. Then, you can set breakpoints, or step over or
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into a program to analyze errors while the program is running.</p>
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<p>To
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debug Java programs,
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follow these steps:</p>
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</div>
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<ol><li class="stepexpand"><span>Compile the Java program by using the DEBUG option,
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which is the -g option on the <samp class="codeph">javac</samp> tool. See <a href="debugopt.htm">Debug Java programs
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by using the *DEBUG option</a> for more details.</span></li>
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<li class="stepexpand"><span>Insert the class file (.class) and source file (.java) in the same
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directory on your iSeries server.</span></li>
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<li class="stepexpand"><span>Run the Java program by using the Run Java (RUNJVA)
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command on the iSeries command
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line. Specify OPTION(*DEBUG) on the Run Java (RUNJVA) command.</span> <p> Only
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a class may be debugged. If a JAR file name is entered for the CLASS keyword,
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OPTION(*DEBUG) is not supported.</p>
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</li>
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<li class="stepexpand"><span>The Java program source is displayed.</span></li>
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<li class="stepexpand"><span>Press F6 (Add/Clear breakpoint) to set breakpoints, or press F10
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(Step) to step through the program. For more information about setting breakpoints,
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see <a href="setbreak.htm">Set breakpoints</a>. For details on stepping,
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see <a href="stepping.htm">Step through Java programs to debug</a>.</span></li>
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</ol>
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<div class="section"><p><strong>Tips:</strong></p>
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<ol><li>While using breakpoints and steps, check the logical flow of the Java program,
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then view and change variables, as necessary.</li>
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<li>Using OPTION(*DEBUG) on the RUNJVA command disables the Just-In-Time (JIT)
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compiler. Files that do not have an associated Java program run in interpreted mode.</li>
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</ol>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="debugopt.htm">Debug Java programs by using the *DEBUG option</a></strong><br />
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Use the *DEBUG option to view the source code before running the program. The *DEBUG option allows you to set breakpoints within the code.</li>
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<li class="ulchildlink"><strong><a href="setbreak.htm">Set breakpoints</a></strong><br />
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The running of a program can be controlled with breakpoints. Breakpoints stop a running program at a specific statement.</li>
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<li class="ulchildlink"><strong><a href="stepping.htm">Step through Java programs to debug</a></strong><br />
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You can step through your program while debugging. You can either
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step over or step into other functions. Java programs and native methods can use
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the step function.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="debug.htm" title="To debug Java programs from the i5/OS command line, select one of the options listed here.">Debug Java programs from an i5/OS command line</a></div>
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</div>
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</div>
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</body>
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</html>
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