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| <h1> Show Monitors </h1> |
| <p> Select the <strong>Show Monitors </strong> command [ <img src="../../../images/org.eclipse.jdt.debug.ui/obj16/thread_and_monitor_obj.png" alt="Show Monitors"> ] to change if monitor information will be shown for suspended threads.</p> |
| <p>Note: The display of monitor information must be supported by the underlying VM. If using an IBM or SUN VM, any version greater than 1.4 will support monitor information.</p> |
| <p>Consider the following code example:</p> |
| <pre> |
| /** |
| * Hello World |
| */ |
| public class HelloWorld { |
| |
| |
| public static void main(String[] args) { |
| Object mutex = new Object(); |
| synchronized (mutex) { |
| System.out.println("Hello World!"); |
| } |
| } |
| } |
| </pre> |
| <p>If the above code snippet is run on a supporting VM with <strong>Show Monitors</strong> selected, the monitor information is represented as a 'key' and appearing before any stack frames as a child of a suspended thread. </p> |
| <p><img src="../../../reference/views/debug/images/ref-monitors_supported.PNG" alt="Monitor Information"></p> |
| <p>If however, we run the same snippet on an unsupported VM with <strong>Show Monitors</strong> selected, we are alerted that monitor information is not supported by the VM. </p> |
| <p><img src="../../../reference/views/debug/images/ref-monitors_unsupported.PNG" alt="Monitors Not Supported"></p> |
| <p> <img border="0" src="../../../images/ngrelc.png" alt="Related concepts" > </p> |
| <p> <a href="../../../concepts/cdebugger.htm">Debugger</a><br> |
| <a href="../../../concepts/clocdbug.htm">Local debugging</a><br> |
| <a href="../../../concepts/cremdbug.htm">Remote debugging</a> </p> |
| <p> <img border="0" src="../../../images/ngrelt.png" alt="Related tasks" > </p> |
| <p> <a href="../../../tasks/tasks-9.htm">Changing debugger launch options</a><br> |
| <a href="../../../tasks/task-remotejava_launch_config.htm">Connecting to a remote VM with the Remote Java application launch configuration</a><br> |
| <a href="../../../tasks/task-disconnect_remote_debug.htm">Disconnecting from a VM</a><br> |
| <a href="../../../tasks/task-launching_java_program.htm">Launching a Java program</a><br> |
| <a href="../../../tasks/task-preparing_to_debug.htm">Preparing to debug</a><br> |
| <a href="../../../tasks/task-resuming_threads.htm">Resuming the execution of suspended threads</a><br> |
| <a href="../../../tasks/task-running_and_debugging.htm">Running and debugging</a><br> |
| <a href="../../../tasks/task-stepping.htm">Stepping through the execution of a program</a><br> |
| <a href="../../../tasks/task-suspending_threads.htm">Suspending threads</a> </p> |
| <p> <img border="0" src="../../../images/ngrelr.png" alt="Related reference" > </p> |
| <p> <a href="../../../reference/views/debug/ref-debug_view.htm">Debug View</a><br> |
| <a href="../../preferences/run-debug/ref-run_debug.htm">Debug preferences</a><br> |
| <a href="../../../reference/views/debug/ref-showsystemthreads.htm">Show System Threads</a><br> |
| <a href="../../../reference/views/debug/ref-showthreadgroups.htm">Show Thread Groups</a></p> |
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