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  31 
  32 Provides user interface objects built according to the cross-platform
  33 Nimbus look and feel.
  34 
  35 <p>Nimbus uses instances of the {@link javax.swing.Painter} interface to paint
  36 components. With each Swing component it associates a foreground and a
  37 background {@code Painter}, and there may be several painters for different
  38 component states.
  39 
  40 <p>Nimbus allows customizing many of its properties, including painters, by
  41 altering the {@link javax.swing.UIDefaults} table. Here's an example:
  42 <pre>
  43     UIManager.put("ProgressBar.tileWidth", myTileWidth);
  44     UIManager.put("ProgressBar[Enabled].backgroundPainter", myBgPainter);
  45     UIManager.put("ProgressBar[Enabled].foregroundPainter", myFgPainter);
  46 </pre>
  47 
  48 <p>Per-component customization is also possible. When rendering a component,
  49 Nimbus checks its client property named "Nimbus.Overrides". The value of this
  50 property should be an instance of {@code UIDefaults}. Settings from that table
  51 override the UIManager settings, but for that particular component instance
  52 only. An optional client property, "Nimbus.Overrides.InheritDefaults" of type
  53 Boolean, specifies whether the overriding settings should be merged with
  54 default ones ({@code true}), or replace them ({@code false}). By default they
  55 are merged:
  56 <pre>
  57     JProgressBar bar = new JProgressBar();
  58     UIDefaults overrides = new UIDefaults();
  59     overrides.put("ProgressBar.cycleTime", 330);
  60     ...
  61     bar.putClientProperty("Nimbus.Overrides", overrides);
  62     bar.putClientProperty("Nimbus.Overrides.InheritDefaults", false);
  63 </pre>
  64 
  65 <p>Colors in Nimbus are derived from a core set of
  66 <a href="doc-files/properties.html#primaryColors">primary colors</a>. There are also
  67 <a href="doc-files/properties.html#secondaryColors">secondary colors</a>, which are
  68 derived from primary ones, but serve themselves as base colors for other
  69 derived colors. The derivation mechanism allows for runtime customization,
  70 i.e. if a primary or secondary color is changed, all colors that are derived
  71 from it are automatically updated. The method
  72 {@link javax.swing.plaf.nimbus.NimbusLookAndFeel#getDerivedColor(java.lang.String, float, float, float, int, boolean)}
  73 may be used to create a derived color.
  74 
  75 <p>These classes are designed to be used while the
  76 corresponding <code>LookAndFeel</code> class has been
  77 installed
  78 (<code>UIManager.setLookAndFeel(new <i>XXX</i>LookAndFeel())</code>).
  79 Using them while a different <code>LookAndFeel</code> is installed
  80 may produce unexpected results, including exceptions.
  81 Additionally, changing the <code>LookAndFeel</code>
  82 maintained by the <code>UIManager</code> without updating the
  83 corresponding <code>ComponentUI</code> of any
  84 <code>JComponent</code>s may also produce unexpected results,
  85 such as the wrong colors showing up, and is generally not
  86 encouraged.
  87 
  88 <p><strong>Note:</strong>
  89 Most of the Swing API is <em>not</em> thread safe.
  90 For details, see
  91 <a href="http://java.sun.com/docs/books/tutorial/uiswing/concurrency/index.html"
  92    target="_top">Concurrency in Swing</a>,
  93 a section in
  94 <em><a href="http://java.sun.com/docs/books/tutorial/"
  95        target="_top">The Java Tutorial</a></em>.
  96 
  97 @since 1.7
  98 @serial exclude
  99 
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