Executing applications from within NetBeans is as simple as either pressing the F6 button on the keyboard or selecting the Run menu item or Project Context menu item. Choosing either of these options will launch your application without specifying any additional Java command-line parameters using the default platform JDK that NetBeans is currently using.

Sometimes we want to change the options that are used for launching applications. NetBeans allows these options to be easily specified by a project's properties.

Right-clicking on a project in the Projects window and selecting the Properties menu option opens the Project Properties dialog. Selecting the Run category allows the configuration options to be defined for launching an application.

From this dialog, we can define and select multiple run configurations for the project via the Configuration dropdown. Selecting the New… button to the right of the Configuration dropdown allows us to enter a name for a new configuration...