Like most programs, start at File - New - and in this case Java Project
Then give it a name and location... well, really location first. Or, just use the default location
Now you will see your project in the package explorer and it's time to add a class. It is the classes that contain the code that we will run. The classes are like entities that we control and who interact with each other.
The project above has no code. That is indicated by the src icon. If we had code, there would be a plus symbol to indicate more can be found there. I selected File - New - Java Class when the project was selected.
After adding in code to print something to the console (a basic text window...) I clicked run project and the run output appeared in the console below.
Most of the projects we create will have LOTS of classes. Each class will represent an Object who is responsible for some functionality or attributes or both.