UIManager

关于 UIManager.getColor(Object key) 的使用 
Posted on 2004年12月16日 20:06 
   在做界面主题的变换的时候，我们经常要对系统的一些颜色进行默认设置，而获得在主题变换时，组件的颜色自动转换到该主题相应的颜色的一种效果。UIManager在这方面是一种很关键的应用。
   在UIManager(Java 2 Platform SE v1.4.2)的方法public static Color getColor(Object key)注释中，key是一个指定颜色的对象，而具体包括哪些可以使用则不得知。
    我们阅读jdk的源代码可以知道，运行UIManager.getColor的时候，其实是通过运行[return getDefaults().getColor(key); ]这段代码获得颜色的。而getDefaults() 返回了一个UIDefaults。再看看UIDefaults，它是通过[Object value = get(key);]来获得颜色的对象，通过它调用的最低层的代码，我们知道，这些对象列表是保存在一个Hashtable（UIDefaults继承了Hashtable）中的，而Hashtable提供了一个接口[public synchronized Enumeration keys()]来获得这些值。
    因此，我们可以通过一段简单的代码来获得可以使用的颜色的关键对象。

import java.awt.*;
import java.util.*;
import javax.swing.*;

public class UIManagerColorTest {
  public UIManagerColorTest() {
  }

  public static void main(String[] args) {

    UIDefaults uiDefaults = UIManager.getDefaults();
    Enumeration enum = uiDefaults.keys();
    while (enum.hasMoreElements()) {
      Object key = enum.nextElement();
      Object val = uiDefaults.get(key);
 
      //如果是颜色对象，则打印
      try {
        Color color = (Color) val;
        System.out.println("[" + key.toString() + "]");
      }
      catch (ClassCastException cce) {
      }
    }

  }
}
以下是运行程序后的结果：
[DesktopIcon.background]
[windowText]
[activeCaptionBorder]
[InternalFrame.borderColor]
[ScrollBar.highlight]
[ComboBox.disabledBackground]
[Tree.selectionBackground]
[FormattedTextField.inactiveBackground]
[InternalFrame.inactiveTitleBackground]
[Table.selectionForeground]
[Label.foreground]
[ToggleButton.highlight]
[Button.background]
[FormattedTextField.caretForeground]
[RadioButtonMenuItem.selectionForeground]
[ToggleButton.shadow]
[OptionPane.errorDialog.titlePane.shadow]
[EditorPane.background]
[RadioButtonMenuItem.foreground]
[RadioButton.light]
[ToggleButton.focus]
[OptionPane.warningDialog.titlePane.background]
[TextArea.caretForeground]
[Button.highlight]
[CheckBox.focus]
[Separator.foreground]
[TabbedPane.light]
[Tree.selectionBorderColor]
[inactiveCaptionText]
[ToolTip.backgroundInactive]
[PasswordField.caretForeground]
[EditorPane.inactiveForeground]
[ToolTip.foreground]
[ToolBar.dockingBackground]
[ToggleButton.disabledText]
[ToggleButton.background]
[Slider.focus]
[ToolBar.floatingForeground]
[TabbedPane.background]
[ComboBox.foreground]
[ScrollBar.shadow]
[RadioButtonMenuItem.acceleratorForeground]
[InternalFrame.borderDarkShadow]
[PopupMenu.background]
[controlLtHighlight]
[CheckBoxMenuItem.background]
[TextPane.foreground]
[FormattedTextField.background]
[Viewport.background]
[TextField.light]
[MenuItem.background]
[TabbedPane.tabAreaBackground]
[Button.focus]
[inactiveCaptionBorder]
[CheckBoxMenuItem.selectionBackground]
[textInactiveText]
[OptionPane.errorDialog.titlePane.background]
[TextField.inactiveBackground]
[Tree.selectionForeground]
[Menu.selectionBackground]
[Tree.background]
[InternalFrame.inactiveTitleForeground]
[control]
[SplitPane.background]
[textText]
[RadioButton.foreground]
[menu]
[EditorPane.foreground]
[SplitPane.shadow]
[OptionPane.warningDialog.titlePane.foreground]
[TabbedPane.selectHighlight]
[RadioButton.shadow]
[Menu.disabledForeground]
[ToggleButton.light]
[windowBorder]
[OptionPane.questionDialog.border.background]
[ToggleButton.foreground]
[Panel.background]
[TabbedPane.foreground]
[RadioButtonMenuItem.background]
[Table.gridColor]
[ScrollBar.foreground]
[TextPane.caretForeground]
[ToolBar.shadow]
[ToggleButton.select]
[Spinner.foreground]
[FormattedTextField.foreground]
[Viewport.foreground]
[RadioButton.darkShadow]
[infoText]
[MenuItem.acceleratorSelectionForeground]
[MenuItem.foreground]
[MenuBar.background]
[OptionPane.errorDialog.titlePane.foreground]
[Button.light]
[menuText]
[ToggleButton.darkShadow]
[TextPane.background]
[MenuItem.acceleratorForeground]
[TabbedPane.darkShadow]
[CheckBox.background]
[TextField.highlight]
[TextArea.selectionBackground]
[Panel.foreground]
[OptionPane.questionDialog.titlePane.background]
[RadioButton.background]
[TextArea.inactiveForeground]
[Slider.shadow]
[textHighlightText]
[SplitPane.darkShadow]
[RadioButton.select]
[PasswordField.foreground]
[ScrollBar.thumb]
[activeCaptionText]
[MenuBar.foreground]
[OptionPane.warningDialog.titlePane.shadow]
[ScrollBar.background]
[Menu.foreground]
[CheckBox.disabledText]
[Spinner.background]
[TextPane.selectionForeground]
[ComboBox.selectionBackground]
[ScrollBar.track]
[CheckBox.foreground]
[TextField.caretForeground]
[ScrollBar.thumbDarkShadow]
[List.selectionBackground]
[OptionPane.messageForeground]
[TextPane.inactiveForeground]
[Button.shadow]
[Menu.acceleratorForeground]
[TextArea.selectionForeground]
[Menu.acceleratorSelectionForeground]
[TextField.foreground]
[textHighlight]
[OptionPane.questionDialog.titlePane.foreground]
[TabbedPane.selected]
[controlShadow]
[MenuItem.disabledForeground]
[MenuItem.selectionForeground]
[MenuItem.checkIcon]
[ColorChooser.swatchesDefaultRecentColor]
[ToolBar.highlight]
[OptionPane.foreground]
[controlText]
[TextArea.background]
[Tree.line]
[CheckBoxMenuItem.disabledForeground]
[Separator.highlight]
[TextField.darkShadow]
[Tree.textForeground]
[ComboBox.selectionForeground]
[ToolBar.foreground]
[PasswordField.selectionBackground]
[Label.disabledShadow]
[FormattedTextField.selectionBackground]
[PasswordField.background]
[ProgressBar.background]
[List.selectionForeground]
[Checkbox.select]
[MenuBar.highlight]
[ComboBox.buttonShadow]
[Menu.background]
[info]
[TextPane.selectionBackground]
[PasswordField.inactiveBackground]
[controlHighlight]
[ScrollBar.darkShadow]
[SplitPane.highlight]
[TableHeader.background]
[InternalFrame.activeTitleForeground]
[TextArea.foreground]
[TextField.background]
[InternalFrame.borderShadow]
[Button.select]
[MenuItem.selectionBackground]
[TextField.shadow]
[ScrollBar.thumbShadow]
[ScrollBar.thumbHighlight]
[scrollbar]
[window]
[PasswordField.selectionForeground]
[TextField.selectionForeground]
[FormattedTextField.selectionForeground]
[OptionPane.background]
[Separator.shadow]
[ComboBox.buttonBackground]
[Table.focusCellBackground]
[ColorChooser.background]
[ProgressBar.foreground]
[Table.foreground]
[Tree.hash]
[RadioButtonMenuItem.acceleratorSelectionForeground]
[TitledBorder.titleColor]
[inactiveCaption]
[Slider.highlight]
[Tree.textBackground]
[EditorPane.selectionBackground]
[ProgressBar.selectionForeground]
[Button.disabledText]
[ToolBar.background]
[Label.disabledForeground]
[PasswordField.inactiveForeground]
[TabbedPane.shadow]
[TabbedPane.highlight]
[List.background]
[InternalFrame.borderHighlight]
[TableHeader.foreground]
[Slider.background]
[RadioButtonMenuItem.disabledForeground]
[controlDkShadow]
[OptionPane.questionDialog.titlePane.shadow]
[DesktopIcon.foreground]
[InternalFrame.activeTitleBackground]
[CheckBoxMenuItem.acceleratorForeground]
[Desktop.background]
[Table.focusCellForeground]
[ColorChooser.foreground]
[RadioButton.highlight]
[Menu.checkIcon]
[OptionPane.errorDialog.border.background]
[ComboBox.buttonHighlight]
[ToolBar.light]
[EditorPane.selectionForeground]
[ComboBox.disabledForeground]
[ScrollPane.background]
[FormattedTextField.inactiveForeground]
[CheckBoxMenuItem.acceleratorSelectionForeground]
[activeCaption]
[TextField.selectionBackground]
[Button.foreground]
[Table.background]
[RadioButton.disabledText]
[MenuBar.shadow]
[List.foreground]
[text]
[desktop]
[ComboBox.buttonDarkShadow]
[ProgressBar.selectionBackground]
[Slider.foreground]
[ToolBar.dockingForeground]
[ToolTip.foregroundInactive]
[RadioButton.focus]
[Table.selectionBackground]
[ScrollBar.trackHighlight]
[Label.background]
[OptionPane.warningDialog.border.background]
[TabbedPane.focus]
[RadioButtonMenuItem.selectionBackground]
[ToolBar.darkShadow]
[Separator.background]
[PopupMenu.foreground]
[CheckBoxMenuItem.foreground]
[EditorPane.caretForeground]
[Button.darkShadow]
[ToolTip.background]
[CheckBoxMenuItem.selectionForeground]
[ToolBar.floatingBackground]
[ComboBox.background]
[TextField.inactiveForeground]
[ScrollPane.foreground]
[Menu.selectionForeground]
[InternalFrame.borderLight]
[Tree.foreground]
 同样的，我们可以修改上面的源代码以获得其他UIManager的其他获得特性的关键词。
 
参考文档：http://bdn.borland.com/article/0,1410,29991,00.html