Re: javac classpath; where to compile from?

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.help

Date:

Thu, 20 Mar 2008 19:10:08 -0700

Message-ID:

<47e31901$0$7027$b9f67a60@news.newsdemon.com>

Thufir wrote:

I would like to compile and execute (run) without changing directories.
Currently, however, I get the following error:

thufir@arrakis:~/java$
thufir@arrakis:~/java$ javac -cp src -d /home/thufir/java/build/ src/com/
web_tomorrow/CPTest2.java
thufir@arrakis:~/java$
thufir@arrakis:~/java$ java build.com.web_tomorrow.CPTest
Exception in thread "main" java.lang.NoClassDefFoundError: build/com/
web_tomorrow/CPTest
thufir@arrakis:~/java$
thufir@arrakis:~/java$

To get good output, only this seems to work:

thufir@arrakis:~/java/src$
thufir@arrakis:~/java/src$ javac -cp . -d /home/thufir/java/build/ com/
web_tomorrow/CPTest2.java
thufir@arrakis:~/java/src$
thufir@arrakis:~/java/src$ cd ..
thufir@arrakis:~/java$
thufir@arrakis:~/java$ cd build/
thufir@arrakis:~/java/build$
thufir@arrakis:~/java/build$ java com.web_tomorrow.CPTest2
Run CPTest2.main()
thufir@arrakis:~/java/build$
thufir@arrakis:~/java/build$

how can I do this without changing directories?

thanks,

Thufir

You can't classpath your way out of this problem. You must be in a
directory that is above the packages you wish to access. You can't
point your classpath at source files only .class files and .jars.

I've never used ant (I'll have to look into that) but making a simple
batch file is very easy. For development I make a compile batch file
and a run batch file so I just have to type a couple of keystrokes after
I edit my program.

--

Knute Johnson
email s/nospam/linux/

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