8041701: Nimbus JTree renderer properties persist across L&F changes

Reviewed-by: serb, psadhukhan

src/java.desktop/share/classes/javax/swing/plaf/nimbus/DerivedColor.java

@@ -25,6 +25,7 @@
 package javax.swing.plaf.nimbus;
 
 import javax.swing.UIManager;
+import javax.swing.plaf.UIResource;
 import java.awt.Color;
 import java.beans.PropertyChangeSupport;
 import java.beans.PropertyChangeListener;
@@ -39,7 +40,7 @@ import java.beans.PropertyChangeListener;
  * @author Jasper Potts
  */
 @SuppressWarnings("serial") // Same-version serialization only
-class DerivedColor extends Color {
+class DerivedColor extends Color implements UIResource {
     private final String uiDefaultParentName;
     private final float hOffset, sOffset, bOffset;
     private final int aOffset;

src/java.desktop/share/classes/javax/swing/plaf/nimbus/NimbusIcon.java

@@ -24,20 +24,26 @@
  */
 package javax.swing.plaf.nimbus;
 
+import javax.swing.JComponent;
+import javax.swing.JMenu;
+import javax.swing.JToolBar;
 import javax.swing.Painter;
+import javax.swing.UIManager;
+import javax.swing.plaf.UIResource;
+import javax.swing.plaf.synth.SynthContext;
 import javax.swing.plaf.synth.SynthIcon;
 
-import javax.swing.plaf.synth.SynthContext;
-import javax.swing.*;
-import java.awt.*;
+import java.awt.BorderLayout;
+import java.awt.Component;
+import java.awt.Graphics2D;
+import java.awt.Graphics;
 import java.awt.image.BufferedImage;
-import javax.swing.plaf.UIResource;
 
 /**
  * An icon that delegates to a painter.
  * @author rbair
  */
-class NimbusIcon implements SynthIcon {
+class NimbusIcon implements SynthIcon, UIResource {
     private int width;
     private int height;
     private String prefix;

test/jdk/javax/swing/JTree/8041701/NimbusPropertiesDoNotImplUIResource.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+import javax.swing.plaf.UIResource;
+
+/**
+ * @test
+ * @bug 8041701
+ * @summary  Nimbus JTree renderer properties persist across L&F changes
+ * @key headful
+ * @run main NimbusPropertiesDoNotImplUIResource
+ */
+
+public class NimbusPropertiesDoNotImplUIResource {
+    private static final String[] defPropertyKeys = new String[] {
+            "Tree.leafIcon", "Tree.closedIcon",
+            "Tree.openIcon", "Tree.selectionForeground",
+            "Tree.textForeground", "Tree.selectionBackground",
+            "Tree.textBackground", "Tree.selectionBorderColor"};
+
+    public static void main(String[] args) throws Exception {
+        UIManager.LookAndFeelInfo[] installedLookAndFeels;
+        installedLookAndFeels = UIManager.getInstalledLookAndFeels();
+
+        for (UIManager.LookAndFeelInfo LF : installedLookAndFeels) {
+            try {
+                UIManager.setLookAndFeel(LF.getClassName());
+                for (String propertyKey : defPropertyKeys) {
+                    verifyProperty(propertyKey);
+                }
+            } catch(UnsupportedLookAndFeelException e) {
+                System.out.println("Note: LookAndFeel " + LF.getClassName()
+                        + " is not supported on this configuration");
+            }
+        }
+
+    }
+
+    private static void verifyProperty(String propertyKey) {
+        Object property = UIManager.get(propertyKey);
+        if (property == null) {
+            return;
+        }
+        if (!(property instanceof UIResource)) {
+            throw new RuntimeException("Property '"+ propertyKey
+                    +"' is instance of '"+property.getClass()
+                    +"' instead of UIResource.");
+        }
+    }
+}