Answer 1

set the focus back to the first jframe. you can do this by calling requestFocus.
e.g.

JFrame frame1 = new JFrame();
.
.
frame1.setVisible(true);
JFrame frame2 = new JFrame();
.
.
frame2.setVisible(true);
//set focus back to 1
frame1.requestFocus();

http://docs.oracle.com/javase/7/docs/api/java/awt/Component.html#requestFocus()