What is the difference between a JFrame and a JDialog?

Question

What is the difference between a JFrame and a JDialog?

Why can\'t we use setDefaultCloseOperation(JDialog.EXIT_ON_CLOSE); for a JD

Answer 1

There are some JDialog constructors with a owner parameter which can be a Frame, a Dialog or a Window. A non-null value also makes the JDialog stay above his owner. This is complementary of the modal behavior described by Fortran.