Running Tutorial Program

Question

Hi all, OK I'm fairly new to Java so go easy with me.
Here is the craic. I have been working through a tutorial from this site, its the DiveLog yoke. I have done the part one and first problem, as stated in the tutorial is compiling.
well because of all the additional classes that arn't defined but are pointed to from the DiveLog.java it will not let you compile via
c:\javac DiveLog.java
you have to do it via (and SDK it in the classpath so it should compile from anywhere, it does work from any driectory, just not this program)
c:\divelog\javac -classpath c:\divelog\DiveLog.java
this works and there is no errors and I am assuming it has compiled, but there are no class files created?
It does actually say in the tutorial that you should compile it like this:
c:\divelog\javac -classpath c:\divelog\ DiveLog.java
(note the space after c:\divelog\ DiveLog.java)
but this doesn't work. It comes back with the 6 other files it is pointing to that have no methods or anything?
Does this make any sense?
A bit confused? why are theere no class files created when it does look like it has compiled?

Answer 1

well, from you rreply i din't understand if those classes should belong to any package.
by asking that i should have clarified that i wanted to know if they have package com.something.or.whatever; in the beginning of source or not.
relying on posts #9 and #10 i suspect that they had not.
They are located on the c:\ packaged in the divelog
directory
I go to the divelog directory ( c:\divelog\ ) and
compile from there using
javac -classpath c:\divelog\DiveLog.java
and that just returns to the prompt without errors or
any messages?well, actually you're only specifying a classpath since you're saying:
javac -classpath <PATH_TO_WHERE_THOSE_CLASSES_ARE>
but instead you should say
javac -classpath <PATH_TO_WHERE_THOSE_CLASSES_ARE> <SOURCE_FILE>
What you say the classes are not in the class path
what do you mean? How come the simple helloworld
program compiles the same way?when i say that these other source files are not in your classpath, then i mean that, your java compiler doesn't know from where to look for these .java or .class files. it only knows where the default classes are (String and System etc.)
why you are able to compile simple helloworld, is because helloworls doesn't need to use any other custom made classes, and you provide HelloWorld.java to javac with absolute or relative path.
however, on newer windows systems, the current directory ('.') is not by default in (class)path, so you might want to modify your system variable CLASSPATH to contain current direcroy as well (then you'd not need to write "-classpath . " after javac every time you want to compile something)