A simple question, after doing a lot of debugging, it just won't work, wondering ~! !!

blusewu

I use Jcreator
import javabook. *;
class rr
{
public static void main (String args [])
{
MainWindow mainwindow;
mainwindow = new MainWindow ();
mainwindow.setVisible (true);
     }
}
Then save it as rr.java.
Run F5 directly, prompt: Exception in thread "main" java.lang.noclassdeffounderror: rr

Also asked, some people say that the classpath is set incorrectly. My settings are:
.;% java_home%\lib;% java_home%\lib\tools.jar;

And if compiled before running, there will be: package javabook does not exist
                                  No symbols found

May I ask how is this going?
It wo n’t work for a long time, expert advice!

zangwei520

1 . You first confirm that the javabook package does not exist
2. After setting the CLASSPATH, add the path of the javabook (the directory name above the javabook, such as:
c:\workspace\javabook\, then it should be:
.;% java_home%\lib;% java_home%\lib\tools.jar; c:\workspace;

I am very new, please advise.

99999948

You look at the path of the compiled .class file, append that path to the environment variable, or run the file directly under that path, try it.