applet error

[Peter]

I can't run an applet, it doesn't execute init() method

load: class .class not found.
java.lang.ClassNotFoundException: .class
    at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:183)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.applet.AppletClassLoader.loadClass (AppletClassLoader.java:127)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
    at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:626)
    at sun.applet.AppletPanel.createApplet(AppletPanel.java :778)
    at sun.applet.AppletPanel.runLoader(AppletPanel.java:707)
    at sun.applet.AppletPanel.run(AppletPanel.java:361)
    at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.FileNotFoundException : /class.class (No such file or directory)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:106)
    at java.io.FileInputStream.<init>(FileInputStream.java :66)
    at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:70)
    at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:161)
    at sun.applet.AppletClassLoader.getBytes (AppletClassLoader.java:295)
    at sun.applet.AppletClassLoader.access$100(AppletClassLoader.java:44)
    at sun.applet.AppletClassLoader$1.run(AppletClassLoader.java:173)
    at java.security.AccessController.doPrivileged (Native Method)
    at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:170)
    ... 8 more

[Jack]

maybe is a version problem
Do you have the last version of java sdk?

[Heather]

I had this error when I forgot to import Applet object.

import java.applet.Applet;

All objects you use from the Java class libraries must be imported. The only exception to this rule is the java.lang class which is automatically imported.