I have installed Netbeans 6.9 just by one click thru Ubuntu Software Center. It didn't ask me for JDK installation folder during installation.
It works.
I want to check CLASSPATH
variable just for learning purpose. But for the command echo $CLASSPATH
.
It only gives a newline output.
I have checked for JDK directory in
/usr/local
directory. But I can't find JDK directory.My questions are:
Where is the class files of API located in file system?
System is a class in package "java.lang". Then the System class file must be in the path of
/some/where/java/lang/System.class
.
I want the path where the "java/lang/System.class" file resides.
Where is the packages physically located in file system?
Here the package means java package such as "java.lang" or "java.io"
(I want just to know for learning purpose)