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| <h1>Debugger and Profiler</h1> |
| <p class="xintro"> |
| <a href="../../images_www/v7/1/screenshots/debugger.png"><img |
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| <p class="intro"> |
| To identify and solve problems in your applications, such as deadlocks and memory leaks, |
| NetBeans IDE provides a feature rich debugger and profiler. |
| </p> |
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| <span class="overview-left" id="im2"><a href="../../images_www/v7/3/features/debugger.png" class="cbox" title="Maven"><img src="../../images_www/v7/3/features/debugger-cut.png" width="320" alt="Maven" /></a></span> |
| <h2>Debugger</h2> |
| <p>The NetBeans Debugger lets you place breakpoints in |
| your source code, add field watches, step through your code, |
| run into methods, take snapshots and monitor execution as it |
| occurs. You can also attach the debugger to an already running process.</p> |
| <p>The IDE includes a visual debugger to let you take GUI snapshots and visually |
| explore the GUI of JavaFX and Swing applications. It lets you view component properties, |
| the hierarchy of components in the container, and locate the source code |
| of components. You can use the visual debugger to easily add listeners to |
| GUI actions without requiring you to search through the source code.</p> |
| <a href="../../kb/docs/java/debug-multithreaded.html" class="arr-link"> |
| Debugging Multi-threaded Applications in NetBeans IDE</a> |
| <br/><a href="../../kb/docs/java/debug-visual.html" class="arr-link"> |
| Using the Visual Debugger in NetBeans IDE</a> |
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| <h2>Profiler</h2> |
| <p>The NetBeans Profiler provides expert assistance for |
| optimizing your application's speed and memory usage, |
| and makes it easier to build reliable and scalable Java SE, |
| JavaFX and Java EE applications.</p> |
| <p>Select from several common profiling tasks, such as |
| standard CPU or memory profiling, or simple monitoring. |
| The options have been preset to default values by experts; |
| you can customize settings for a specific application. </p> |
| <a href="../../kb/docs/java/profiler-intro.html" class="arr-link"> |
| Introduction to Profiling Java Applications in NetBeans IDE</a> |
| <div class="line"> </div> |
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| |
| <table> |
| <tr> |
| <td class="valign-top"><h2>Multi-Threaded Debugging</h2></td> |
| <!--<td></td>--> |
| <td class="valign-top"><h2>Heap Walker</h2></td> |
| <!--<td></td>--> |
| <td class="valign-top"><h2>Generational Count</h2></td> |
| </tr> |
| <tr> |
| <td class="valign-top" style="width:33%;padding-right:10px;"> |
| <p> |
| <span class="overview-centre" id="im8"><img |
| src="../../images_www/v7/3/features/debugger-thread-cut.png" class="box " |
| alt="Heap Walker"/></span><br/> |
| To switch threads, use the Current |
| Thread Chooser or access the threads |
| navigation directly from the editor |
| margin. You can check the state of the |
| current session's threads |
| and inspect the call stack and locale |
| variables of the current thread. |
| </p> |
| </td> |
| <td class="valign-top" style="width:33%;padding-right:10px;"> |
| <p> |
| <span class="overview-centre" id="im8"><img |
| src="../../images_www/v7/3/features/debugger-heap-cut.png" class="box " |
| alt="Heap Walker"/></span><br/> |
| Use the Heap Walker to evaluate the |
| Java heap contents and to identify |
| unnecessary references that cause memory |
| leaks. You can browse classes and instances |
| of classes on the heap, fields of each instance |
| or class, and references to each instance. |
| <br/><br/> |
| </p> |
| </td> |
| <td class="valign-top" style="width:33%"> |
| <p> |
| <span class="overview-centre" id="im8"><img |
| src="../../images_www/v7/3/features/debugger-generational-cut.png" class="box " |
| alt="Generational Count"/></span><br/> |
| Generational counts allow you to |
| identify objects that are surviving |
| all attempts to collect them. This |
| information can be used to find long |
| lived and leaking objects.</p> |
| <a href="../../kb/articles/nb-profiler-uncoveringleaks_pt1.html" class="arr-link"> |
| Uncovering Memory Leaks Using NetBeans Profiler</a> |
| <br/><br/> |
| </td> |
| </tr> |
| </table> |
| |
| <h2>See Also</h2> |
| <ul class="bigger"> |
| <li><a href="/community/releases/81/index.html">NetBeans IDE 8.1 Release Page</a> for a list of specific features in the latest stable release.</li> |
| <li><a href="../../kb/trails/java-se.html">General Java Development Learning Trail</a> for tutorials that will help you get started.</li> |
| </ul> |
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