How to use

setOpaque

method

in

javax.swing.JPasswordField

@Override
public void installUI (JComponent c) {
  super.installUI (c);
  JPasswordField passwordField = (JPasswordField) c;
  passwordField.setOpaque (false);
  passwordField.setBorder (BorderFactory.createEmptyBorder (5, 2, 10, 0));
  passwordField.setBackground (MaterialColors.LIGHT_BLUE_400);
  this.focusedBackground = passwordField.getBackground ();
  this.unfocusedBackground = MaterialColors.GRAY_200;
  this.focusedSelectionBackground = MaterialColors.bleach (focusedBackground, 0.3f);
  this.unfocusedSelectionBackground = unfocusedBackground;
}

passwordField.setBackground(Themes.currentTheme.dataEntryBackground());
passwordField.setOpaque(false);