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"HTML Tidy for Linux/x86 (vers 1st February 2002), see www.w3.org">
<title>Stepping Through Code</title>
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<h3>Stepping Through Code</h3>
<p>Stepping in source code executes just one instruction or line of
code in the debuggee at a time. This is useful for finding exactly
where a particular condition occurs in the code. The actions
described below are accessible via the named commands as well as
through the "Step" menu items.</p>
<h4>Operations</h4>
<p>There are several commands for stepping through source code.
They are described as follows.</p>
<dl>
<dt><code>step</code></dt>
<dd>Step a single line of source code, going <em>into</em> method
calls, if any. That is, if there is a method call being made,
execution will be halted at the top of that new method.</dd>
<dt><code>next</code></dt>
<dd>Step a single line of source code, going <em>through</em>
method calls, if any. That is, it runs the method at full speed
rather than stepping into it.</dd>
<dt><code>stepi</code></dt>
<dd>Step a single instruction, going <em>into</em> method calls,
if any.</dd>
<dt><code>nexti</code></dt>
<dd>Step a single instruction, going <em>through</em> method
calls, if any.</dd>
<dt><code>step out|up</code></dt>
<dd>Returns to the line that invoked the current method. This is
identical to the "finish" operation found in other
debuggers.</dd>
</dl>
<h4>Exclusion filters</h4>
<p>At some point or another you will single-step into the Java core
classes. This will happen often enough that you wish you could
avoid stepping into such classes. Fortunately, JSwat provides the
<code>exclude</code> command for just this purpose. You can add
individual classes and entire packages to the list of class
filters. During single-stepping, the debugger will not step into
these classes. See the exclude command help for more
information.</p>
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