8252722: More Swing plaf APIs that rely on default constructors

Reviewed-by: prr

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicBorders.java

@@ -47,6 +47,11 @@
 
 public class BasicBorders {
 
+    /**
+     * Constructs a {@code BasicBorders}.
+     */
+    public BasicBorders() {}
+
     /**
      * Returns a border instance for a {@code JButton}.
      *
@@ -473,6 +478,11 @@ public Insets getBorderInsets(Component c, Insets insets)       {
      */
     @SuppressWarnings("serial") // Superclass is not serializable across versions
     public static class MarginBorder extends AbstractBorder implements UIResource {
+        /**
+         * Constructs a {@code MarginBorder}.
+         */
+        public MarginBorder() {}
+
         public Insets getBorderInsets(Component c, Insets insets)       {
             Insets margin = null;
             //

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicButtonUI.java

@@ -76,6 +76,11 @@ public class BasicButtonUI extends ButtonUI{
     // ********************************
     //          Create PLAF
     // ********************************
+    /**
+     * Constructs a {@code BasicButtonUI}.
+     */
+    public BasicButtonUI() {}
+
     /**
      * Returns an instance of {@code BasicButtonUI}.
      *

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicCheckBoxMenuItemUI.java

@@ -39,6 +39,11 @@
  */
 public class BasicCheckBoxMenuItemUI extends BasicMenuItemUI {
 
+    /**
+     * Constructs a {@code BasicCheckBoxMenuItemUI}.
+     */
+    public BasicCheckBoxMenuItemUI() {}
+
     /**
      * Constructs a new instance of {@code BasicCheckBoxMenuItemUI}.
      *

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicCheckBoxUI.java

@@ -60,6 +60,11 @@ public class BasicCheckBoxUI extends BasicRadioButtonUI {
     //            Create PLAF
     // ********************************
 
+    /**
+     * Constructs a {@code BasicCheckBoxUI}.
+     */
+    public BasicCheckBoxUI() {}
+
     /**
      * Returns an instance of {@code BasicCheckBoxUI}.
      *

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicColorChooserUI.java

@@ -77,6 +77,11 @@ public class BasicColorChooserUI extends ColorChooserUI
     protected PropertyChangeListener propertyChangeListener;
     private Handler handler;
 
+    /**
+     * Constructs a {@code BasicColorChooserUI}.
+     */
+    public BasicColorChooserUI() {}
+
     /**
      * Returns a new instance of {@code BasicColorChooserUI}.
      *
@@ -383,6 +388,11 @@ else if (prop == "componentOrientation") {
      * Instantiate it only within subclasses of {@code BasicColorChooserUI}.
      */
     public class PropertyHandler implements PropertyChangeListener {
+        /**
+         * Constructs a {@code PropertyHandler}.
+         */
+        public PropertyHandler() {}
+
         public void propertyChange(PropertyChangeEvent e) {
             getHandler().propertyChange(e);
         }

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicComboBoxEditor.java

@@ -176,5 +176,9 @@ public void setBorder(Border b) {
     @SuppressWarnings("serial") // Same-version serialization only
     public static class UIResource extends BasicComboBoxEditor
     implements javax.swing.plaf.UIResource {
+        /**
+         * Constructs a {@code UIResource}.
+         */
+        public UIResource() {}
     }
 }

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicComboBoxRenderer.java

@@ -145,5 +145,9 @@ public Component getListCellRendererComponent(JList<?> list,
      */
     @SuppressWarnings("serial") // Same-version serialization only
     public static class UIResource extends BasicComboBoxRenderer implements javax.swing.plaf.UIResource {
+        /**
+         * Constructs a {@code UIResource}.
+         */
+        public UIResource() {}
     }
 }

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicComboBoxUI.java

@@ -232,6 +232,11 @@ public class BasicComboBoxUI extends ComboBoxUI {
      */
     protected Insets padding;
 
+    /**
+     * Constructs a {@code BasicComboBoxUI}.
+     */
+    public BasicComboBoxUI() {}
+
     // Used for calculating the default size.
     private static ListCellRenderer<Object> getDefaultListCellRenderer() {
         @SuppressWarnings("unchecked")
@@ -592,6 +597,11 @@ private Handler getHandler() {
      * <code>BasicComboBoxUI</code>.
      */
     public class KeyHandler extends KeyAdapter {
+        /**
+         * Constructs a {@code KeyHandler}.
+         */
+        public KeyHandler() {}
+
         @Override
         public void keyPressed( KeyEvent e ) {
             getHandler().keyPressed(e);
@@ -607,6 +617,11 @@ public void keyPressed( KeyEvent e ) {
      * <code>BasicComboBoxUI</code>.
      */
     public class FocusHandler implements FocusListener {
+        /**
+         * Constructs a {@code FocusHandler}.
+         */
+        public FocusHandler() {}
+
         public void focusGained( FocusEvent e ) {
             getHandler().focusGained(e);
         }
@@ -627,6 +642,11 @@ public void focusLost( FocusEvent e ) {
      * @see #createListDataListener
      */
     public class ListDataHandler implements ListDataListener {
+        /**
+         * Constructs a {@code ListDataHandler}.
+         */
+        public ListDataHandler() {}
+
         public void contentsChanged( ListDataEvent e ) {
             getHandler().contentsChanged(e);
         }
@@ -651,6 +671,11 @@ public void intervalRemoved( ListDataEvent e ) {
      * @see #createItemListener
      */
     public class ItemHandler implements ItemListener {
+        /**
+         * Constructs a {@code ItemHandler}.
+         */
+        public ItemHandler() {}
+
         // This class used to implement behavior which is now redundant.
         public void itemStateChanged(ItemEvent e) {}
     }
@@ -670,6 +695,11 @@ public void itemStateChanged(ItemEvent e) {}
      * @see #createPropertyChangeListener
      */
     public class PropertyChangeHandler implements PropertyChangeListener {
+        /**
+         * Constructs a {@code PropertyChangeHandler}.
+         */
+        public PropertyChangeHandler() {}
+
         public void propertyChange(PropertyChangeEvent e) {
             getHandler().propertyChange(e);
         }
@@ -697,6 +727,11 @@ private void updateToolTipTextForChildren() {
      * <code>BasicComboBoxUI</code>.
      */
     public class ComboBoxLayoutManager implements LayoutManager {
+        /**
+         * Constructs a {@code ComboBoxLayoutManager}.
+         */
+        public ComboBoxLayoutManager() {}
+
         public void addLayoutComponent(String name, Component comp) {}
 
         public void removeLayoutComponent(Component comp) {}

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicComboPopup.java

@@ -733,6 +733,11 @@ public void actionPerformed(ActionEvent e){
      * @see BasicComboPopup#createMouseListener
      */
     protected class InvocationMouseHandler extends MouseAdapter {
+        /**
+         * Constructs an {@code InvocationMouseHandler}.
+         */
+        protected InvocationMouseHandler() {}
+
         /**
          * Responds to mouse-pressed events on the combo box.
          *
@@ -758,6 +763,11 @@ public void mouseReleased( MouseEvent e ) {
      * list if it is dragging over the list.
      */
     protected class InvocationMouseMotionHandler extends MouseMotionAdapter {
+        /**
+         * Constructs an {@code InvocationMouseMotionHandler}.
+         */
+        protected InvocationMouseMotionHandler() {}
+
         public void mouseDragged( MouseEvent e ) {
             getHandler().mouseDragged(e);
         }
@@ -771,6 +781,10 @@ public void mouseDragged( MouseEvent e ) {
      * BasicComboBoxUI ActionMap/InputMap methods.
      */
     public class InvocationKeyHandler extends KeyAdapter {
+        /**
+         * Constructs an {@code InvocationKeyHandler}.
+         */
+        public InvocationKeyHandler() {}
         public void keyReleased( KeyEvent e ) {}
     }
 
@@ -780,6 +794,10 @@ public void keyReleased( KeyEvent e ) {}
      * override.
      */
     protected class ListSelectionHandler implements ListSelectionListener {
+        /**
+         * Constructs a {@code ListSelectionHandler}.
+         */
+        protected ListSelectionHandler() {}
         public void valueChanged( ListSelectionEvent e ) {}
     }
 
@@ -793,6 +811,10 @@ public void valueChanged( ListSelectionEvent e ) {}
      * @see #createItemListener
      */
     public class ListDataHandler implements ListDataListener {
+        /**
+         * Constructs a {@code ListDataHandler}.
+         */
+        public ListDataHandler() {}
         public void contentsChanged( ListDataEvent e ) {}
 
         public void intervalAdded( ListDataEvent e ) {
@@ -806,6 +828,10 @@ public void intervalRemoved( ListDataEvent e ) {
      * This listener hides the popup when the mouse is released in the list.
      */
     protected class ListMouseHandler extends MouseAdapter {
+        /**
+         * Constructs a {@code ListMouseHandler}.
+         */
+        protected ListMouseHandler() {}
         public void mousePressed( MouseEvent e ) {
         }
         public void mouseReleased(MouseEvent anEvent) {
@@ -818,6 +844,11 @@ public void mouseReleased(MouseEvent anEvent) {
      * The selection change is not committed to the model, this is for user feedback only.
      */
     protected class ListMouseMotionHandler extends MouseMotionAdapter {
+        /**
+         * Constructs a {@code ListMouseMotionHandler}.
+         */
+        protected ListMouseMotionHandler() {}
+
         public void mouseMoved( MouseEvent anEvent ) {
             getHandler().mouseMoved(anEvent);
         }
@@ -828,6 +859,10 @@ public void mouseMoved( MouseEvent anEvent ) {
      * combo box.
      */
     protected class ItemHandler implements ItemListener {
+        /**
+         * Constructs an {@code ItemHandler}.
+         */
+        protected ItemHandler() {}
         public void itemStateChanged( ItemEvent e ) {
             getHandler().itemStateChanged(e);
         }
@@ -844,6 +879,10 @@ public void itemStateChanged( ItemEvent e ) {
      * @see #createPropertyChangeListener
      */
     protected class PropertyChangeHandler implements PropertyChangeListener {
+        /**
+         * Constructs a {@code PropertyChangeHandler}.
+         */
+        protected PropertyChangeHandler() {}
         public void propertyChange( PropertyChangeEvent e ) {
             getHandler().propertyChange(e);
         }

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicDesktopIconUI.java

@@ -243,6 +243,11 @@ public class MouseInputHandler extends MouseInputAdapter
         int __x, __y;
         Rectangle startingBounds;
 
+        /**
+         * Constructs a {@code MouseInputHandler}.
+         */
+        public MouseInputHandler() {}
+
         public void mouseReleased(MouseEvent e) {
             _x = 0;
             _y = 0;

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicDesktopPaneUI.java

@@ -678,6 +678,10 @@ public boolean accept(Object sender) {
      */
     @SuppressWarnings("serial") // Superclass is not serializable across versions
     protected class OpenAction extends AbstractAction {
+        /**
+         * Constructs an {@code OpenAction}.
+         */
+        protected OpenAction() {}
         public void actionPerformed(ActionEvent evt) {
             JDesktopPane dp = (JDesktopPane)evt.getSource();
             SHARED_ACTION.setState(dp, Actions.RESTORE);
@@ -693,6 +697,10 @@ public boolean isEnabled() {
      */
     @SuppressWarnings("serial") // Superclass is not serializable across versions
     protected class CloseAction extends AbstractAction {
+        /**
+         * Constructs a {@code CloseAction}.
+         */
+        protected CloseAction() {}
         public void actionPerformed(ActionEvent evt) {
             JDesktopPane dp = (JDesktopPane)evt.getSource();
             SHARED_ACTION.setState(dp, Actions.CLOSE);
@@ -712,6 +720,10 @@ public boolean isEnabled() {
      */
     @SuppressWarnings("serial") // Superclass is not serializable across versions
     protected class MinimizeAction extends AbstractAction {
+        /**
+         * Constructs a {@code MinimizeAction}.
+         */
+        protected MinimizeAction() {}
         public void actionPerformed(ActionEvent evt) {
             JDesktopPane dp = (JDesktopPane)evt.getSource();
             SHARED_ACTION.setState(dp, Actions.MINIMIZE);
@@ -731,6 +743,10 @@ public boolean isEnabled() {
      */
     @SuppressWarnings("serial") // Superclass is not serializable across versions
     protected class MaximizeAction extends AbstractAction {
+        /**
+         * Constructs a {@code MaximizeAction}.
+         */
+        protected MaximizeAction() {}
         public void actionPerformed(ActionEvent evt) {
             JDesktopPane dp = (JDesktopPane)evt.getSource();
             SHARED_ACTION.setState(dp, Actions.MAXIMIZE);
@@ -750,6 +766,10 @@ public boolean isEnabled() {
      */
     @SuppressWarnings("serial") // Superclass is not serializable across versions
     protected class NavigateAction extends AbstractAction {
+        /**
+         * Constructs a {@code NavigateAction}.
+         */
+        protected NavigateAction() {}
         public void actionPerformed(ActionEvent evt) {
             JDesktopPane dp = (JDesktopPane)evt.getSource();
             dp.selectFrame(true);

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicFileChooserUI.java

@@ -757,6 +757,12 @@ protected class SelectionListener implements ListSelectionListener {
         // its functionality has been moved into Handler. If you need to add
         // new functionality add it to the Handler, but make sure this
         // class calls into the Handler.
+
+        /**
+         * Constructs a {@code SelectionListener}.
+         */
+        protected SelectionListener() {}
+
         /** {@inheritDoc} */
         public void valueChanged(ListSelectionEvent e) {
             getHandler().valueChanged(e);
@@ -1325,6 +1331,11 @@ public String getDescription() {
      */
     @SuppressWarnings("serial") // Superclass is not serializable across versions
     protected class CancelSelectionAction extends AbstractAction {
+        /**
+         * Constructs a {@code CancelSelectionAction}.
+         */
+        protected CancelSelectionAction() {}
+
         /** {@inheritDoc} */
         public void actionPerformed(ActionEvent e) {
             getFileChooser().cancelSelection();
@@ -1336,6 +1347,11 @@ public void actionPerformed(ActionEvent e) {
      */
     @SuppressWarnings("serial") // Superclass is not serializable across versions
     protected class UpdateAction extends AbstractAction {
+        /**
+         * Constructs an {@code UpdateAction}.
+         */
+        protected UpdateAction() {}
+
         /** {@inheritDoc} */
         public void actionPerformed(ActionEvent e) {
             JFileChooser fc = getFileChooser();