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| Launching a Java program in debug mode |
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| <h1> |
| Launching a Java program in debug mode |
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| <p> |
| Launching a program in debug mode allows you to suspend and resume the |
| program, inspect variables, and evaluate expressions using the debugger. |
| </p> |
| <p> |
| To launch a Java program in debug mode, |
| </p> |
| |
| <ol> |
| <li> In the <strong>Package Explorer</strong>, select the Java compilation unit |
| or class file with the main method you want to launch. </li> |
| <li> Press the <strong>Debug</strong> [ <img src="../images/org.eclipse.debug.ui/etool16/debug_exc.png" width="16" height="16"> |
| ] button in the workbench toolbar or select <strong>Run > Debug</strong> |
| from the workbench menu bar. Alternatively you can select <strong>Run > |
| Debug As > Java Application</strong> from the workbench menu bar, or select |
| <strong>Debug As > Java Application </strong>in the <strong>Package Explorer</strong> |
| pop-up menu or in the drop-down menu on the <strong>Debug</strong> tool bar |
| button.</li> |
| <li> Your program is now launched and the launched process appears in the Debug |
| view. </li> |
| </ol> |
| <p>If you want your program to stop in the <em>main</em> method so that you |
| can step through its complete execution, create a <strong> Java Application</strong> |
| launch configuration and check the <strong>Stop in main </strong>checkbox on |
| the <strong>Main </strong>tab. </p> |
| <p>You can also debug a Java program by selecting a project instead of the |
| compilation unit or class file. You will be prompted to select a class |
| from those classes that define a <em>main</em> method. (If only one class with a main method is |
| found in the project, that class is launched as if you selected it.)</p> |
| <p> |
| <img border="0" src="../images/ngrelc.png" alt="Related concepts" ><br> |
| <a href="../concepts/cjavaviews.htm">Java views</a><br> |
| <a href="../concepts/concepts-7.htm">Java editor</a><br> |
| <a href="../concepts/cdebugger.htm">Debugger</a> |
| </p> |
| <p> |
| <img border="0" src="../images/ngrelt.png" alt="Related tasks" ><br> |
| <a href="task-remotejava_launch_config.htm">Connecting to a remote VM with the Java Remote Application launcher</a><br> |
| <a href="task-relaunch_program.htm">Re-launching a program</a><br> |
| <a href="task-running_and_debugging.htm">Running and debugging</a><br> |
| <a href="../tasks/tasks-executionArgs.htm">Setting execution arguments</a><br> |
| <a href="task-stepping.htm">Stepping through the execution of a program</a><br> |
| </p> |
| <p> |
| <img border="0" src="../images/ngrelr.png" alt="Related reference" ><br> |
| <a href="../reference/views/debug/ref-debug_view.htm">Debug view</a><br> |
| <a href="../reference/ref-view-package-explorer.htm">Package Explorer</a><br> |
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