You entered:
As long as you were able to successfully execute the command:
java -version
from your progfun directory, then you areready to compile Java code.
More on Java SDK
Table 5-4 gives an overview of the major releases, together with some key characteristics. Note that the versions were originally referred to as
JDKs (Java Development Kits) and later rebranded into J2SE (Java 2 Platform, Standard Edition).