Yes.
Hopefully this chapter explained just exactly what you needed to know to run Java programs, and everything worked out perfectly, and you can now create Java source programs, and compile them into bytecodes, and execute them using the Java interpreter.
Well.... one can hope. If something was less than perfect, find a friend that knows more about these things and is happy to help. Or, start again and go through everything once again. Or, move on and come back to this chapter later.
You may wish to review the following. Click on a subject that interests you to go to where it was discussed.
The next chapter discusses how the example program worked.