Cannot get Eclipse or VS Code to work after PC rebuild?

Has anybody else had issues getting existing projects to build after a PC rebuild/reset.  I needed to rebuild my PC (Windows 11) for other reasons,  but now I cannot get my projects to build in either VS code or Eclipse.  Java is installed, SDK is installed, Devices are installed, manifest look OK.  Feels like it should be something obvious but it is not coming to me.  Looks like a Java issue but I cannot think what?  Any thoughts/help greatly appreciated.