If you are not going to pass any parameters to your program, and your program does not require any specific actions to be performed before start, you can run it right from the editor.
Click in the gutter near the class declaration and select Run.
To run a script, open it in the editor or select it in the Project tool window, and then select Run <script file name> from the context menu.
IntelliJ IDEA creates a temporary run/debug configuration of the type Node.js.
If you are going to pass parameters to your program, add VM options (for example, to allow remote debugging), or otherwise customize the startup of your program, use a run/debug configuration.
Click in the gutter near the class declaration and select Modify Run Configuration.
Modify the run/debug configuration as needed. For example, if you need to run your program with arguments, add the arguments to the Program arguments field.
To access additional parameters, click Modify options and select the required option from the menu.
Click OK to apply the changes.
Click or press Shift+F10.
When the application starts, you can view its output and interact with it in the Run tool window. Every run/debug configuration creates a separate tab when you run it.
To learn more about tool windows and how to manage them, see the Tool windows topic.
On the toolbar of the Run tool window, click or press Shift+F10
Stop and pause applications
When you stop a program, its process is interrupted and exits immediately. When you pause a program, it continues running in the background, but its output is suspended.
Stop a program
In the Run tool window, click on the toolbar. Alternatively, press Ctrl+F2 and select the process to stop.
Pause a program
Right-click in the Run tool window and select Pause Output from the context menu. Use the same toggle to resume the program.
Deal with errors
If there are errors in your program, here is how you can address them.
If an exception is thrown:
If the meaning of the exception is unclear, you can navigate to the exception class right from the stack trace and read the documentation for the exception. This may help you understand its cause. In some cases, this is enough to sort out the problem.
Attach the debugger and examine the program state that led to the failure. See Tutorial: Debug your first Java application for a quick introduction to IntelliJ IDEA debugger.
Run static analysis to see where incorrect values might be coming from.
If a logic error is present, the debugger may save you a lot of time finding and fixing the cause. See Tutorial: Debug your first Java application for a quick introduction to IntelliJ IDEA debugger.
If the problem is related to application performance, IntelliJ IDEA profiler will help you analyze the problem and assess how efficient your fix is.
Show running processes
You can view the list of all active run or debug sessions and navigate between them.
From the main menu, select Run | Show Running List. In the top-right corner of the editor, IntelliJ IDEA shows a list with all active applications.