Sri, Shankar

Assuming that the machine is not on the internet...why don't assume the hostname java.sun.com and deploy the required files on the local box. I know its a hack but it should work...

If your page is a JSP or a Servelet, you can generate javascript on the fly to acheive this. For example - you can generate an array of objects that contain information about the images...

Print the statement to the std err and check before it goes into execute...
btw. as a side note...you should indent your code...

For cases 1 2 and 3 you have a non terminating loop!

do
{
switch(choice)
{
case 1: setColour("Red") ; break ;
case 2: setColour("Blue") ; break ;
case 3: setColour("White") ; break ;
default: System.out.println("Enter number 1, 2, or 3:") ;
}
}while(choice != 1 || choice != 2 || choice != 3) ;

Pass reference by value means that the original reference cannot be modified...
so if you have :
public void kewlMethod (Object orv) {
}
and u have a fragment ...
line 1 : Object o = new Object ();
line 2 : kewlMethod (o);
here kewlMethod is passed a copy of the reference to the object created in line 1 so if in the method body it assigns something else to orv that will not modify the original reference o.

can u post an example of what is happening?

#2