JDK 1.2.2 migration to SDK 1.4.0_01

Question

I wrote several applets that compile and run great when I compiled them with jdk 1.2.2, but since i downloaded and installed the new sdk 1.4.0_01 package none of my applets will run. What do I need to check to get back on track with sdk1.4.0?
Two examples of new errors:
import Ticket; worked in jdk 1.2.2, but now won't compile even with my Ticket class in the same directory, why does it work in 1.2.2 and not in 1.4.0?
This is the error from the new java console on class' compiled before download, when run in the new environment:
load: MyClass.class is not public or has no public constructor.
java.lang.IllegalAccessException: Class sun.applet.AppletPanel can not access a member of class MyClass with modifiers "public"
     at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:57)
     at java.lang.Class.newInstance0(Class.java:290)
     at java.lang.Class.newInstance(Class.java:249)
     at sun.applet.AppletPanel.createApplet(AppletPanel.java:548)
     at sun.plugin.AppletViewer.createApplet(AppletViewer.java:1621)
     at sun.applet.AppletPanel.runLoader(AppletPanel.java:477)
     at sun.applet.AppletPanel.run(AppletPanel.java:290)
     at java.lang.Thread.run(Thread.java:536)
What changed and what should I look to fix?

Answer 1

What I've found so far is that in SDK 1.4.0 :
You can no longer import a class that is not in a named package. The >class that uses Ticket can also be in the default package or Ticket >can be in the same package as the other class, in which case you do >not need an import statement. Or you can put Ticket into a named >package and import it.And for some reason still unknown, yet working... making the applets public does resolve the other issue once the above fix is corrected.