About java  IO Exception I'm not sure i don't have java on my
computer now and i don't have time to try it now(Sorry!)

If you want to make applet an aplication you should delete "extends
JApplet" and start as if you write a normal application
"public static void  main(String [] args)"
then you should creat a Frame
"Frame xxx = new Frame("the name you want to appear");"
then you can set the default exit opertion for the frame
"xxx.setDefaultExitOperation(JFrame.EXIT_ON_CLOSE);"
you can add any panel to the frame as follow:
" xxx.agetContentPane().add(Panel);"
after you add the Panels you want to the frame you should write
"xxx.pack();"
"xxx.show();"

To make sure that the value entered  are there you can make a search
using a loop (What do you mean by JDBC?)