How can I add some padding to a jtextfield?
The problem you are having is that the UI is setting its own border on the text field, overriding the margin you set. You can see a warning to this effect in the javadoc of
The solution is to let the UI set a border, then squeeze in another border of your own:
field.setBorder(BorderFactory.createCompoundBorder( field.getBorder(), BorderFactory.createEmptyBorder(5, 5, 5, 5)));