SWT basics: difference between Display and Shell

Question

A typical SWT sample code looks like the following:

final Display display = Display.getDefault();
final Shell shell = createMyShell(display);
shell.open();
while (!shell.isDisposed()) {
  if (!display.readAndDispatch()) {
    display.sleep();
  }
}

What is the difference between the Display and the Shell? If multiple windows have to be shown, does each one need an own loop?

Answer 1

Yes, if you have to show multiple windows (shells), you must have a loop for each one.

But there is only one Display object in an application that you need to create.