I believe you can switch that in the settings. Go to Preferences > Build, Execution, Deployment > Compiler and use the checkbox for "Make project automatically

I believe you can switch that in the settings. Go to Preferences > Build, Execution, Deployment > Compiler and use the checkbox for "Make project automatically". Likewise, under Compiler there's a "Java Compiler" panel in the hierarchy. You can switch it to using the Eclipse compiler which I think allows you to launch with errors in your project. For me, IntelliJ's auto-complete is a lot nicer than Eclipse's and that makes me more productive.