// Create a number spinner JSpinner spinner = new JSpinner(); // Get the text field JFormattedTextField tf = ((JSpinner.DefaultEditor)spinner.getEditor()).getTextField(); // Set the margin (add two spaces to the left and right side of the value) int top = 0; int left = 2; int bottom = 0; int right = 2; Insets insets = new Insets(top, left, bottom, right); tf.setMargin(insets);
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