Beginner to learn java, questions about applet_html/css_WEB-ITnose

A beginner in Java followed the tutorial and wrote an applet program and reported an error when running! The source code is posted below:
HelloWorldApplet.java source code:
import java.applet.*;
import java.awt.*;
public class HelloWorldApplet extends Applet
{
public void paint(Graphics g)
{

g.drawString("Hello World !",10,50);

}
}
FirstApplet.html source code:







The compilation is passed and the HelloWorldApplet.class file is generated, and these three files are in the same directory.


Running appletviewer FirstApplet.html will report: Loading: The class HelloWorldApplet.class cannot be found
I suspect that my path is wrong:
In my environment variable: JAVA_HOME=C:Javajdk1.6.0_22
CLASSPATH=.;%JAVA_HOME%/lib/tools. jar;%JAVA_HOME%/lib/dt.jar;E:Androidapache- tomcat-7.0.26libjsp-api.jar; E:Androidapache-tomcat-7.0.26libservlet-api.jar;%ANT_HOME%/bin
And me The program is placed under:
under E:androidjavaAppletJavaApplet01. It is running incorrectly: adding -debug, -encoding, etc. after appletviewer is incorrect. I am a Java novice. Please tell me the solution!

Reply to discussion (solution)

Brother, did you go to the wrong place?

Brother, did you run into the wrong place?
I also think the path is wrong, how can I change it? Humbly asking for advice?

The current path is not added to CLASSPATH.
How to write the current path in the configuration. I forgot. Check it yourself.

The current path is not added to CLASSPATH.
How to write the current path in the configuration. I forgot. Check it yourself
After adding the java-related CLASSPATH=%JAVA_HOME%/lib/tools.jar;%JAVA_HOME%/lib/dt.jar, add the current path? It doesn’t seem to work after I added it!

This is the html section. Go to the java section and ask.