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  1. JDK
  2. JDK-8251569

Address reliance on default constructors in the javax.swing.plaf.synth APIs

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Details

    • CSR
    • Resolution: Approved
    • P4
    • 16
    • client-libs
    • None
    • source
    • minimal
    • Add explicit constructors equivalent to default constructors
    • Java API
    • SE

    Description

      Summary

      Add explicit constructors to API classes of javax.swing.plaf.synth that have default constructors

      Problem

      Default constructors are not recommended for classes that are parts of a formal API.

      Solution

      Add explicit public no-arg constructors for public classes and protected no-arg constructor for public abstract classes.

      Specification

      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthButtonUI.java    2020-08-14 11:39:59.484571000 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthButtonUI.java    2020-08-14 11:39:55.902370900 +0530
      @@ -49,6 +49,11 @@
           private static final Object SYNTH_BUTTON_UI_KEY = new Object();
      
           /**
      +     * Constructs a {@code SynthButtonUI}.
      +     */
      +    public SynthButtonUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthCheckBoxMenuItemUI.java  2020-08-14 11:40:24.172061400 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthCheckBoxMenuItemUI.java  2020-08-14 11:40:20.384836300 +0530
      @@ -44,6 +44,12 @@
       public class SynthCheckBoxMenuItemUI extends SynthMenuItemUI {
      
           /**
      +     *
      +     * Constructs a {@code SynthCheckBoxMenuItemUI}.
      +     */
      +    public SynthCheckBoxMenuItemUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthCheckBoxUI.java  2020-08-14 11:40:48.756871200 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthCheckBoxUI.java  2020-08-14 11:40:44.190489200 +0530
      @@ -39,6 +39,12 @@
        */
       public class SynthCheckBoxUI extends SynthRadioButtonUI {
      
      +    /**
      +     *
      +     * Constructs a {@code SynthCheckBoxUI}.
      +     */
      +    public SynthCheckBoxUI() {}
      +
           // ********************************
           //            Create PLAF
           // ********************************
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthColorChooserUI.java  2020-08-14 11:41:25.721111800 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthColorChooserUI.java  2020-08-14 11:41:22.001767000 +0530
      @@ -48,6 +48,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthColorChooserUI}.
      +     */
      +    public SynthColorChooserUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthComboBoxUI.java  2020-08-14 11:41:50.256504300 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthComboBoxUI.java  2020-08-14 11:41:46.726470900 +0530
      @@ -93,6 +93,12 @@
           private boolean forceOpaque = false;
      
           /**
      +     *
      +     * Constructs a {@code SynthComboBoxUI}.
      +     */
      +    public SynthComboBoxUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthDesktopIconUI.java   2020-08-14 11:42:16.262100400 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthDesktopIconUI.java   2020-08-14 11:42:12.611758200 +0530
      @@ -45,6 +45,12 @@
           private Handler handler = new Handler();
      
           /**
      +     *
      +     * Constructs a {@code SynthDesktopIconUI}.
      +     */
      +    public SynthDesktopIconUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthDesktopPaneUI.java   2020-08-14 11:42:40.725788700 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthDesktopPaneUI.java   2020-08-14 11:42:36.086859100 +0530
      @@ -48,6 +48,12 @@
           private DesktopManager oldDesktopManager;
      
           /**
      +     *
      +     * Constructs a {@code SynthDesktopPaneUI}.
      +     */
      +    public SynthDesktopPaneUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthEditorPaneUI.java    2020-08-14 11:43:03.403016800 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthEditorPaneUI.java    2020-08-14 11:42:59.770889500 +0530
      @@ -50,6 +50,12 @@
           private boolean updateKBAction = true;
      
           /**
      +     *
      +     * Constructs a {@code SynthEditorPaneUI}.
      +     */
      +    public SynthEditorPaneUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthFormattedTextFieldUI.java    2020-08-14 11:43:30.786132400 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthFormattedTextFieldUI.java    2020-08-14 11:43:27.185617600 +0530
      @@ -36,6 +36,12 @@
        */
       public class SynthFormattedTextFieldUI extends SynthTextFieldUI {
           /**
      +     *
      +     * Constructs a {@code SynthFormattedTextFieldUI}.
      +     */
      +    public SynthFormattedTextFieldUI() {}
      +
      +    /**
            * Creates a UI for a JFormattedTextField.
            *
            * @param c the formatted text field
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthLabelUI.java 2020-08-14 11:43:54.832500700 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthLabelUI.java 2020-08-14 11:43:51.065905800 +0530
      @@ -47,6 +47,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthLabelUI}.
      +     */
      +    public SynthLabelUI() {}
      +
      +    /**
            * Returns the LabelUI implementation used for the skins look and feel.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthListUI.java  2020-08-14 11:44:18.347895500 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthListUI.java  2020-08-14 11:44:13.379444500 +0530
      @@ -47,6 +47,12 @@
           private boolean useUIBorder;
      
           /**
      +     *
      +     * Constructs a {@code SynthListUI}.
      +     */
      +    public SynthListUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param list component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthMenuBarUI.java   2020-08-14 11:45:00.713966600 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthMenuBarUI.java   2020-08-14 11:44:56.657713100 +0530
      @@ -43,6 +43,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthMenuBarUI}.
      +     */
      +    public SynthMenuBarUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param x component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthMenuItemUI.java  2020-08-14 11:46:06.199220700 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthMenuItemUI.java  2020-08-14 11:45:58.509103800 +0530
      @@ -49,6 +49,12 @@
           private SynthStyle accStyle;
      
           /**
      +     *
      +     * Constructs a {@code SynthMenuItemUI}.
      +     */
      +    public SynthMenuItemUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthMenuUI.java  2020-08-14 11:47:15.667408800 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthMenuUI.java  2020-08-14 11:47:06.879642800 +0530
      @@ -46,6 +46,12 @@
           private SynthStyle accStyle;
      
           /**
      +     *
      +     * Constructs a {@code SynthMenuUI}.
      +     */
      +    public SynthMenuUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param x component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthOptionPaneUI.java    2020-08-14 11:48:10.169233400 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthOptionPaneUI.java    2020-08-14 11:48:06.207090800 +0530
      @@ -46,6 +46,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthOptionPaneUI}.
      +     */
      +    public SynthOptionPaneUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param x component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthPainter.java 2020-08-14 11:48:35.402289700 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthPainter.java 2020-08-14 11:48:31.995075200 +0530
      @@ -65,6 +65,10 @@
            */
           static SynthPainter NULL_PAINTER = new SynthPainter() {};
      
      +    /**
      +     * Constructor for subclasses to call.
      +     */
      +    protected SynthPainter() {}
      
           /**
            * Paints the background of an arrow button. Arrow buttons are created by
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthPanelUI.java 2020-08-14 11:48:57.575558000 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthPanelUI.java 2020-08-14 11:48:53.483650600 +0530
      @@ -43,6 +43,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthPanelUI}.
      +     */
      +    public SynthPanelUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthPasswordFieldUI.java 2020-08-14 11:49:18.778170600 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthPasswordFieldUI.java 2020-08-14 11:49:14.774627300 +0530
      @@ -40,6 +40,12 @@
       public class SynthPasswordFieldUI extends SynthTextFieldUI {
      
           /**
      +     *
      +     * Constructs a {@code SynthPasswordFieldUI}.
      +     */
      +    public SynthPasswordFieldUI() {}
      +
      +    /**
            * Creates a UI for a JPasswordField.
            *
            * @param c the JPasswordField
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthPopupMenuUI.java 2020-08-14 11:49:40.179783900 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthPopupMenuUI.java 2020-08-14 11:49:35.632019700 +0530
      @@ -46,6 +46,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthPopupMenuUI}.
      +     */
      +    public SynthPopupMenuUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param x component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthProgressBarUI.java   2020-08-14 11:50:36.031648800 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthProgressBarUI.java   2020-08-14 11:50:30.103149200 +0530
      @@ -53,6 +53,12 @@
           private int glowWidth; // Glow around the bar foreground
      
           /**
      +     *
      +     * Constructs a {@code SynthProgressBarUI}.
      +     */
      +    public SynthProgressBarUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param x component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthRadioButtonMenuItemUI.java   2020-08-14 11:51:10.453365200 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthRadioButtonMenuItemUI.java   2020-08-14 11:51:05.496563500 +0530
      @@ -40,6 +40,12 @@
       public class SynthRadioButtonMenuItemUI extends SynthMenuItemUI {
      
           /**
      +     *
      +     * Constructs a {@code SynthRadioButtonMenuItemUI}.
      +     */
      +    public SynthRadioButtonMenuItemUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param b component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthRadioButtonUI.java   2020-08-14 11:51:50.670139000 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthRadioButtonUI.java   2020-08-14 11:51:46.566181300 +0530
      @@ -37,6 +37,11 @@
        * @since 1.7
        */
       public class SynthRadioButtonUI extends SynthToggleButtonUI {
      +    /**
      +     *
      +     * Constructs a {@code SynthRadioButtonUI}.
      +     */
      +    public SynthRadioButtonUI() {}
      
           // ********************************
           //        Create PLAF
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthRootPaneUI.java  2020-08-14 11:52:19.755497700 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthRootPaneUI.java  2020-08-14 11:52:15.220481700 +0530
      @@ -42,6 +42,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthRootPaneUI}.
      +     */
      +    public SynthRootPaneUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthScrollBarUI.java 2020-08-14 11:52:53.297972700 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthScrollBarUI.java 2020-08-14 11:52:48.157729600 +0530
      @@ -49,6 +49,12 @@
           private boolean validMinimumThumbSize;
      
           /**
      +     *
      +     * Constructs a {@code SynthScrollBarUI}.
      +     */
      +    public SynthScrollBarUI() {}
      +
      +    /**
            * Returns a UI.
            * @return a UI
            * @param c a component
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthScrollPaneUI.java    2020-08-14 11:53:19.629853200 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthScrollPaneUI.java    2020-08-14 11:53:14.131322700 +0530
      @@ -54,6 +54,12 @@
           private ViewportViewFocusHandler viewportViewFocusHandler;
      
           /**
      +     *
      +     * Constructs a {@code SynthScrollPaneUI}.
      +     */
      +    public SynthScrollPaneUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param x component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthSeparatorUI.java 2020-08-14 11:53:52.094809600 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthSeparatorUI.java 2020-08-14 11:53:47.653121100 +0530
      @@ -48,6 +48,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthSeparatorUI}.
      +     */
      +    public SynthSeparatorUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthSpinnerUI.java   2020-08-14 11:54:24.039631800 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthSpinnerUI.java   2020-08-14 11:54:19.911918300 +0530
      @@ -54,6 +54,12 @@
           private EditorFocusHandler editorFocusHandler = new EditorFocusHandler();
      
           /**
      +     *
      +     * Constructs a {@code SynthSpinnerUI}.
      +     */
      +    public SynthSpinnerUI() {}
      +
      +    /**
            * Returns a new instance of SynthSpinnerUI.
            *
            * @param c the JSpinner (not used)
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthSplitPaneUI.java 2020-08-14 11:55:06.386526700 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthSplitPaneUI.java 2020-08-14 11:55:01.646788900 +0530
      @@ -65,6 +65,11 @@
            */
           private SynthStyle dividerStyle;
      
      +    /**
      +     *
      +     * Constructs a {@code SynthSplitPaneUI}.
      +     */
      +    public SynthSplitPaneUI() {}
      
           /**
            * Creates a new SynthSplitPaneUI instance
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTabbedPaneUI.java    2020-08-14 11:55:39.452504700 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTabbedPaneUI.java    2020-08-14 11:55:33.231247500 +0530
      @@ -106,6 +106,12 @@
           private boolean selectedTabIsPressed = false;
      
           /**
      +     *
      +     * Constructs a {@code SynthTabbedPaneUI}.
      +     */
      +    public SynthTabbedPaneUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTableHeaderUI.java   2020-08-14 11:56:18.000701100 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTableHeaderUI.java   2020-08-14 11:56:13.869253100 +0530
      @@ -54,6 +54,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthTableHeaderUI}.
      +     */
      +    public SynthTableHeaderUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param h component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTableUI.java 2020-08-14 11:57:16.666784000 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTableUI.java 2020-08-14 11:57:09.282174100 +0530
      @@ -88,6 +88,12 @@
       //
      
           /**
      +     *
      +     * Constructs a {@code SynthTableUI}.
      +     */
      +    public SynthTableUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTextAreaUI.java  2020-08-14 11:57:51.450560800 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTextAreaUI.java  2020-08-14 11:57:46.867002700 +0530
      @@ -56,6 +56,13 @@
           private Handler handler = new Handler();
           private SynthStyle style;
           private boolean updateKBAction = true;
      +
      +    /**
      +     *
      +     * Constructs a {@code SynthTextAreaUI}.
      +     */
      +    public SynthTextAreaUI() {}
      +
           /**
            * Creates a UI object for a JTextArea.
            *
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTextFieldUI.java 2020-08-14 11:58:27.136501200 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTextFieldUI.java 2020-08-14 11:58:22.559064700 +0530
      @@ -57,6 +57,12 @@
           private boolean updateKBAction = true;
      
           /**
      +     *
      +     * Constructs a {@code SynthTextFieldUI}.
      +     */
      +    public SynthTextFieldUI() {}
      +
      +    /**
            * Creates a UI for a JTextField.
            *
            * @param c the text field
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTextPaneUI.java  2020-08-14 12:00:07.527460900 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTextPaneUI.java  2020-08-14 11:59:58.546706500 +0530
      @@ -51,6 +51,12 @@
       public class SynthTextPaneUI extends SynthEditorPaneUI {
      
           /**
      +     *
      +     * Constructs a {@code SynthTextPaneUI}.
      +     */
      +    public SynthTextPaneUI() {}
      +
      +    /**
            * Creates a UI for the JTextPane.
            *
            * @param c the JTextPane object
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthToggleButtonUI.java  2020-08-14 12:01:02.279579400 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthToggleButtonUI.java  2020-08-14 12:00:55.861355400 +0530
      @@ -38,6 +38,12 @@
        * @since 1.7
        */
       public class SynthToggleButtonUI extends SynthButtonUI {
      +    /**
      +     *
      +     * Constructs a {@code SynthToggleButtonUI}.
      +     */
      +    public SynthToggleButtonUI() {}
      +
           // ********************************
           //          Create PLAF
           // ********************************
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthToolBarUI.java   2020-08-14 12:01:47.227043000 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthToolBarUI.java   2020-08-14 12:01:39.720646400 +0530
      @@ -58,6 +58,12 @@
           private SynthStyle dragWindowStyle;
      
           /**
      +     *
      +     * Constructs a {@code SynthToolBarUI}.
      +     */
      +    public SynthToolBarUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthToolTipUI.java   2020-08-14 12:02:32.480093900 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthToolTipUI.java   2020-08-14 12:02:27.606015700 +0530
      @@ -49,6 +49,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthToolTipUI}.
      +     */
      +    public SynthToolTipUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTreeUI.java  2020-08-14 12:03:27.516267900 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthTreeUI.java  2020-08-14 12:03:23.844040900 +0530
      @@ -74,6 +74,12 @@
           private Icon expandedIconWrapper = new ExpandedIconWrapper();
      
           /**
      +     *
      +     * Constructs a {@code SynthTreeUI}.
      +     */
      +    public SynthTreeUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param x component to create UI object for
      --- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthViewportUI.java  2020-08-14 12:03:52.232991700 +0530
      +++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthViewportUI.java  2020-08-14 12:03:47.970577900 +0530
      @@ -42,6 +42,12 @@
           private SynthStyle style;
      
           /**
      +     *
      +     * Constructs a {@code SynthViewportUI}.
      +     */
      +    public SynthViewportUI() {}
      +
      +    /**
            * Creates a new UI object for the given component.
            *
            * @param c component to create UI object for

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              psadhukhan Prasanta Sadhukhan
              prr Philip Race
              Sergey Bylokhov
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                Updated:
                Resolved: