Make sure manually set properties aren't overridden when theme is changed.

core/src/main/java/com/github/weisj/darklaf/components/text/SearchTextField.java

@@ -27,6 +27,8 @@ package com.github.weisj.darklaf.components.text;
 import javax.swing.*;
 import javax.swing.text.Document;
 
+import com.github.weisj.darklaf.ui.text.DarkTextFieldUI;
+
 public class SearchTextField extends JTextField {
 
     public static final int SEARCH = 0;
@@ -57,7 +59,7 @@ public class SearchTextField extends JTextField {
      */
     public SearchTextField(final Document doc, final String text, final int columns) {
         super(doc, text, columns);
-        putClientProperty("JTextField.variant", "search");
+        putClientProperty(DarkTextFieldUI.KEY_VARIANT, DarkTextFieldUI.VARIANT_SEARCH);
         addActionListener(e -> {
             SearchListener[] list = listenerList.getListeners(SearchListener.class);
             SearchEvent evt = new SearchEvent(SearchTextField.this, SEARCH, "search", getText());

core/src/main/java/com/github/weisj/darklaf/ui/list/DarkListUI.java

@@ -61,7 +61,7 @@ public class DarkListUI extends DarkListUIBridge {
     @Override
     protected void installDefaults() {
         super.installDefaults();
-        list.putClientProperty(KEY_ALTERNATE_ROW_COLOR, UIManager.getBoolean("List.alternateRowColor"));
+        PropertyUtil.installBooleanProperty(list, KEY_ALTERNATE_ROW_COLOR, "List.alternateRowColor");
     }
 
     @Override

core/src/main/java/com/github/weisj/darklaf/ui/table/DarkTableHeaderUI.java

@@ -28,7 +28,6 @@ import java.awt.*;
 
 import javax.swing.*;
 import javax.swing.plaf.ComponentUI;
-import javax.swing.plaf.UIResource;
 import javax.swing.table.DefaultTableCellRenderer;
 import javax.swing.table.TableCellRenderer;
 import javax.swing.table.TableColumn;
@@ -78,10 +77,8 @@ public class DarkTableHeaderUI extends DarkTableHeaderUIBridge {
     @Override
     protected void uninstallDefaults() {
         super.uninstallDefaults();
-        if (header.getBorder() instanceof UIResource) {
         LookAndFeel.uninstallBorder(header);
     }
-    }
 
     @Override
     public void paint(final Graphics g2, final JComponent c) {

core/src/main/java/com/github/weisj/darklaf/ui/table/DarkTableUI.java

@@ -204,10 +204,9 @@ public class DarkTableUI extends DarkTableUIBridge implements FocusListener {
             LookAndFeel.installProperty(table, "rowHeight", ROW_HEIGHT_FALLBACK);
         }
         table.setDefaultEditor(Object.class, new DarkTableCellEditor());
-        table.putClientProperty(KEY_RENDER_BOOLEAN_AS_CHECKBOX,
+        PropertyUtil.installBooleanProperty(table, KEY_RENDER_BOOLEAN_AS_CHECKBOX, "Table.renderBooleanAsCheckBox");
-                                UIManager.getBoolean("Table.renderBooleanAsCheckBox"));
+        PropertyUtil.installBooleanProperty(table, KEY_ALTERNATE_ROW_COLOR, "Table.alternateRowColor");
-        table.putClientProperty(KEY_BOOLEAN_RENDER_TYPE, UIManager.getString("Table.booleanRenderType"));
+        PropertyUtil.installProperty(table, KEY_BOOLEAN_RENDER_TYPE, UIManager.getString("Table.booleanRenderType"));
-        table.putClientProperty(KEY_ALTERNATE_ROW_COLOR, UIManager.getBoolean("Table.alternateRowColor"));
         setupRendererComponents(table);
         borderColor = UIManager.getColor("TableHeader.borderColor");
         selectionFocusBackground = UIManager.getColor("Table.focusSelectionBackground");

core/src/main/java/com/github/weisj/darklaf/ui/text/DarkTextFieldUI.java

@@ -51,7 +51,6 @@ public class DarkTextFieldUI extends DarkTextFieldUIBridge implements PropertyCh
     protected static final String KEY_PREFIX = "JTextField.";
     public static final String KEY_VARIANT = KEY_PREFIX + "variant";
     public static final String KEY_SHOW_CLEAR = KEY_PREFIX + "showClear";
-    public static final String KEY_KEEP_SELECTION_ON_FOCUS_LOST = KEY_PREFIX + "keepSelectionOnFocusLost";
     public static final String KEY_FIND_POPUP = KEY_PREFIX + "Search.FindPopup";
     public static final String VARIANT_SEARCH = "search";
     protected static Icon clear;
@@ -264,8 +263,6 @@ public class DarkTextFieldUI extends DarkTextFieldUIBridge implements PropertyCh
     @Override
     protected void installDefaults() {
         super.installDefaults();
-        editor.putClientProperty(KEY_KEEP_SELECTION_ON_FOCUS_LOST,
-                                 UIManager.getBoolean("TextField.keepSelectionOnFocusLost"));
         arcSize = UIManager.getInt("TextField.arc");
         borderSize = UIManager.getInt("TextField.borderThickness");
         searchArcSize = UIManager.getInt("TextField.searchArc");

core/src/main/java/com/github/weisj/darklaf/ui/text/DarkTextUI.java

@@ -108,7 +108,7 @@ public abstract class DarkTextUI extends BasicTextUI implements PropertyChangeLi
             editor.setBorder(null);
         }
         if (editor != null) {
-            editor.putClientProperty(KEY_ROUNDED_SELECTION, UIManager.getBoolean("TextComponent.roundedSelection"));
+            PropertyUtil.installBooleanProperty(editor, KEY_ROUNDED_SELECTION, "TextComponent.roundedSelection");
         }
         disabledColor = UIManager.getColor(getPropertyPrefix() + ".disabledBackground");
         inactiveColor = UIManager.getColor(getPropertyPrefix() + ".inactiveBackground");

core/src/main/java/com/github/weisj/darklaf/ui/tree/DarkTreeUI.java

@@ -168,11 +168,10 @@ public class DarkTreeUI extends BasicTreeUI implements PropertyChangeListener {
         collapsedSelected = UIManager.getIcon("Tree.collapsed.selected.unfocused.icon");
         collapsedFocus = UIManager.getIcon("Tree.collapsed.unselected.focused.icon");
         collapsed = UIManager.getIcon("Tree.collapsed.unselected.unfocused.icon");
-        tree.putClientProperty(DarkTreeUI.KEY_RENDER_BOOLEAN_AS_CHECKBOX,
+        PropertyUtil.installBooleanProperty(tree, KEY_RENDER_BOOLEAN_AS_CHECKBOX, "Tree.renderBooleanAsCheckBox");
-                               UIManager.getBoolean("Tree.renderBooleanAsCheckBox"));
+        PropertyUtil.installProperty(tree, KEY_BOOLEAN_RENDER_TYPE, UIManager.getString("Tree.booleanRenderType"));
-        tree.putClientProperty(DarkTreeUI.KEY_BOOLEAN_RENDER_TYPE, UIManager.getString("Tree.booleanRenderType"));
+        PropertyUtil.installProperty(tree, KEY_LINE_STYLE, UIManager.getString("Tree.defaultLineStyle"));
-        tree.setShowsRootHandles(true);
+        LookAndFeel.installProperty(tree, JTree.SHOWS_ROOT_HANDLES_PROPERTY, true);
-        tree.putClientProperty(KEY_LINE_STYLE, UIManager.getString("Tree.defaultLineStyle"));
     }
 
     @Override

utils/src/main/java/com/github/weisj/darklaf/util/PropertyUtil.java

@@ -31,6 +31,16 @@ import javax.swing.*;
 
 public class PropertyUtil {
 
+    public static void installProperty(final JComponent c, final String key, final Object value) {
+        if (c.getClientProperty(key) == null) {
+            c.putClientProperty(key, value);
+        }
+    }
+
+    public static void installBooleanProperty(final JComponent c, final String key, final String valueKey) {
+        installProperty(c, key, UIManager.getBoolean(valueKey));
+    }
+
     public static boolean getBooleanProperty(final Component c, final String property) {
         return getBooleanProperty(c, property, false);
     }