Using Runtime.getRuntime to run java

[cardwell cupp]

I am using
Runtime.getRuntime.exec("javac " + path + file)
to compile a java file...it works just fine.
Then when I use the same code to run it,
Runtime.getRuntime.exec("java " + path + class)
it comes back with a NoClassDeff error. Doesn't that usually mean that the classpath is not set correctly? But if I can do it with javac then why not java?
Thanks
Cardwell

[Cindy Glass]

Is the JVM putting the output class file in the classpath?

[Jim Yingst]

My guess: use the -d option of javac to make javac create the class files in appropriate directories for their packages. E.g. if Test.java has a class Test in package mypkg, then
<pre>javac -d classdir Test.java</pre>
will create the file in classdir/mypkg/Test.class. I've never figured out why this isn't automatic, but you need to specify the option.