Sometimes you might need to run or debug a certain class with the main() method , without creating a dedicated run configuration. In this case, IntelliJ IDEA provides a temporary run configuration.

Temporary run/debug configuration is added to the list of available configurations and works same way as the permanent run/debug configurations. You can change its settings using the Run/Debug Configuration dialog box and optionally save it as permanent.

To create a temporary run configuration
  1. Select the desired class with the main() method in the Project view or open it in the editor.
  2. Do one pf the following:
    • On the context menu, choose Run <name> or Debug <name>.
    • Press ⌃⇧R or ⌃⇧R⌃⇧F10 or ⌃⇧F10⌃⇧R or ⌃⇧R^ F9, ⌃F9 or ⌃F9^ ⇧ F10, ⌃⇧F10 or ⌃⇧F10.

    IntelliJ IDEA creates a temporary configuration, which appears in the Run/Debug Configuration selector, when the run or debug session is over.

To save a temporary configuration, do one of the following
  • In the Run/Debug Configuration selector, choose Save <configuration name>.
  • In the Run/Debug Configuration dialog box, click the mainToolbarSave button.
  • On the context menu of the editor or Project view, choose Save <configuration name>.