java.lang.Object
- javax.swing.LookAndFeel
- - javax.swing.plaf.basic.BasicLookAndFeel
  - - com.formdev.flatlaf.FlatLaf

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

FlatDarkLaf, FlatLightLaf, FlatPropertiesLaf, IntelliJTheme.ThemeLaf
```
public abstract class FlatLaf
extends javax.swing.plaf.basic.BasicLookAndFeel
```
The base class for all Flat LaFs.

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`(package private) static class`	`FlatLaf.ActiveFont`
`static interface`	`FlatLaf.DisabledIconProvider`	A provider for disabled icons.
`private class`	`FlatLaf.FlatUIDefaults`
`private static class`	`FlatLaf.ImageIconUIResource`

Field Summary

Fields
Modifier and Type	Field	Description
`private static boolean`	`aquaLoaded`
`private static java.util.List<java.lang.Object>`	`customDefaultsSources`
`private static java.lang.String`	`DESKTOPFONTHINTS`
`private java.beans.PropertyChangeListener`	`desktopPropertyListener`
`private java.lang.String`	`desktopPropertyName`
`private java.lang.String`	`desktopPropertyName2`
`private java.util.Map<java.lang.String,java.lang.String>`	`extraDefaults`
`private static java.util.Map<java.lang.String,java.lang.String>`	`globalExtraDefaults`
`private LinuxPopupMenuCanceler`	`linuxPopupMenuCanceler`
`private MnemonicHandler`	`mnemonicHandler`
`static java.lang.Object`	`NULL_VALUE`	Special value returned by functions used in `runWithUIDefaultsGetter(Function, Runnable)` or `registerUIDefaultsGetter(Function)` to indicate that the UI value should become `null`.
`private javax.swing.PopupFactory`	`oldPopupFactory`
`private java.util.function.Consumer<javax.swing.UIDefaults>`	`postInitialization`
`private static java.lang.String`	`preferredFontFamily`
`private static java.lang.String`	`preferredLightFontFamily`
`private static java.lang.String`	`preferredMonospacedFontFamily`
`private static java.lang.String`	`preferredSemiboldFontFamily`
`private boolean`	`subMenuUsabilityHelperInstalled`
`private static java.util.function.Function<java.lang.String,java.awt.Color>`	`systemColorGetter`
`private java.util.List<java.util.function.Function<java.lang.Object,java.lang.Object>>`	`uiDefaultsGetters`
`private static java.util.Set<java.lang.String>`	`uiKeyPlatformPrefixes`
`private static java.util.Set<java.lang.String>`	`uiKeySpecialPrefixes`
`private static boolean`	`updateUIPending`

Constructor Summary

Constructors
Constructor Description

FlatLaf()

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`private static void`	`addLazyUIdelegateClassLoading(javax.swing.UIDefaults defaults)`	Handle UI delegate classes if running in special application where multiple class loaders are involved.
`(package private) void`	`applyAdditionalProperties(java.util.Properties properties)`
`static javax.swing.UIDefaults.ActiveValue`	`createActiveFontValue(float scaleFactor)`
`(package private) static javax.swing.plaf.FontUIResource`	`createCompositeFont(java.lang.String family, int style, int size)`
`static void`	`disableWindowsD3Donscreen()`	Disable usage of Windows Direct3D (DirectX) onscreen surfaces because this may lead to repaint issues (ghosting) on some systems (probably depending on graphics card/driver).
`boolean`	`equals(java.lang.Object obj)`
`private java.lang.Object`	`fallbackAATextInfo()`
`protected java.util.Properties`	`getAdditionalDefaults()`
`(package private) static java.util.List<java.lang.Object>`	`getCustomDefaultsSources()`
`javax.swing.UIDefaults`	`getDefaults()`
`javax.swing.Icon`	`getDisabledIcon(javax.swing.JComponent component, javax.swing.Icon icon)`
`java.util.Map<java.lang.String,java.lang.String>`	`getExtraDefaults()`	Gets extra UI defaults; or `null`.
`static java.util.Map<java.lang.String,java.lang.String>`	`getGlobalExtraDefaults()`	Gets global extra UI defaults; or `null`.
`java.lang.String`	`getID()`	Returns the look and feel identifier.
`protected java.util.List<java.lang.Class<?>>`	`getLafClassesForDefaultsLoading()`
`static java.lang.String`	`getPreferredFontFamily()`	Returns the preferred font family to be used for (nearly) all fonts; or `null`.
`static java.lang.String`	`getPreferredLightFontFamily()`	Returns the preferred font family to be used for "light" fonts; or `null`.
`static java.lang.String`	`getPreferredMonospacedFontFamily()`	Returns the preferred font family to be used for monospaced fonts; or `null`.
`static java.lang.String`	`getPreferredSemiboldFontFamily()`	Returns the preferred font family to be used for "semibold" fonts; or `null`.
`static java.util.Map<java.lang.String,java.lang.Class<?>>`	`getStyleableInfos(javax.swing.JComponent c)`	Returns information about styleable values of a component.
`static <T> T`	`getStyleableValue(javax.swing.JComponent c, java.lang.String key)`	Returns the (styled) value for the given key from the given component.
`boolean`	`getSupportsWindowDecorations()`	Returns whether FlatLaf supports custom window decorations.
`static java.util.function.Function<java.lang.String,java.awt.Color>`	`getSystemColorGetter()`	Returns the system color getter function, or `null`.
`static java.lang.String`	`getUIKeyLightOrDarkPrefix(boolean dark)`	Returns UI key prefix, used in FlatLaf properties files, for light or dark themes.
`static java.util.Set<java.lang.String>`	`getUIKeyPlatformPrefixes()`	Returns set of UI key prefixes, used in FlatLaf properties files, for current platform.
`static java.util.Set<java.lang.String>`	`getUIKeySpecialPrefixes()`	Returns set of special UI key prefixes, used in FlatLaf properties files.
`int`	`hashCode()`
`static void`	`hideMnemonics()`
`private void`	`initDefaultFont(javax.swing.UIDefaults defaults)`
`private void`	`initFonts(javax.swing.UIDefaults defaults)`
`void`	`initialize()`
`private void`	`initializeAqua()`	Initialize Aqua LaF on macOS, which is required for using Mac screen menubar.
`static void`	`initIconColors(javax.swing.UIDefaults defaults, boolean dark)`	Adds the default color palette for action icons and object icons to the given UIDefaults.
`private void`	`initResourceBundle(javax.swing.UIDefaults defaults, java.lang.String bundleName)`
`static boolean`	`install(javax.swing.LookAndFeel newLookAndFeel)`	Deprecated. use `setup(LookAndFeel)` instead; this method will be removed in a future version
`static void`	`installLafInfo(java.lang.String lafName, java.lang.Class<? extends javax.swing.LookAndFeel> lafClass)`	Adds the given look and feel to the set of available look and feels.
`abstract boolean`	`isDark()`
`private static boolean`	`isDisplayableFrameOrDialog(java.awt.Window w)`
`static boolean`	`isLafDark()`	Checks whether the current look and feel is dark.
`boolean`	`isNativeLookAndFeel()`
`static boolean`	`isShowMnemonics()`
`boolean`	`isSupportedLookAndFeel()`
`static boolean`	`isUseNativeWindowDecorations()`	Returns whether native window decorations are enabled.
`static java.lang.Object`	`parseDefaultsValue(java.lang.String key, java.lang.String value, java.lang.Class<?> valueType)`	Parses a UI defaults value string and converts it into a binary object.
`private void`	`putAATextInfo(javax.swing.UIDefaults defaults)`
`private void`	`putDefaults(javax.swing.UIDefaults defaults, java.lang.Object value, java.lang.String... keys)`
`static void`	`registerCustomDefaultsSource(java.io.File folder)`	Registers a folder where FlatLaf searches for properties files with custom UI defaults.
`static void`	`registerCustomDefaultsSource(java.lang.String packageName)`	Registers a package where FlatLaf searches for properties files with custom UI defaults.
`static void`	`registerCustomDefaultsSource(java.lang.String packageName, java.lang.ClassLoader classLoader)`	Registers a package where FlatLaf searches for properties files with custom UI defaults.
`static void`	`registerCustomDefaultsSource(java.net.URL packageUrl)`	Registers a package where FlatLaf searches for properties files with custom UI defaults.
`void`	`registerUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object> uiDefaultsGetter)`	Registers a UI defaults getter function that is invoked before the standard getter.
`static void`	`repaintAllFramesAndDialogs()`	Repaint all displayable frames and dialogs.
`private static void`	`reSetLookAndFeel()`
`static void`	`revalidateAndRepaintAllFramesAndDialogs()`	Revalidate and repaint all displayable frames and dialogs.
`static void`	`runWithUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object> uiDefaultsGetter, java.lang.Runnable runnable)`	Registers a UI defaults getter function that is invoked before the standard getter, runs the given runnable and unregisters the UI defaults getter function again.
`void`	`setExtraDefaults(java.util.Map<java.lang.String,java.lang.String> extraDefaults)`	Sets extra UI defaults, which are only used when setting up the application look and feel.
`static void`	`setGlobalExtraDefaults(java.util.Map<java.lang.String,java.lang.String> globalExtraDefaults)`	Sets global extra UI defaults, which are only used when setting up the application look and feel.
`static void`	`setPreferredFontFamily(java.lang.String preferredFontFamily)`	Sets the preferred font family to be used for (nearly) all fonts.
`static void`	`setPreferredLightFontFamily(java.lang.String preferredLightFontFamily)`	Sets the preferred font family to be used for "light" fonts.
`static void`	`setPreferredMonospacedFontFamily(java.lang.String preferredMonospacedFontFamily)`	Sets the preferred font family to be used for monospaced fonts.
`static void`	`setPreferredSemiboldFontFamily(java.lang.String preferredSemiboldFontFamily)`	Sets the preferred font family to be used for "semibold" fonts.
`static void`	`setSystemColorGetter(java.util.function.Function<java.lang.String,java.awt.Color> systemColorGetter)`	Sets a system color getter function that is invoked when function `systemColor()` is used in FlatLaf properties files.
`static boolean`	`setup(javax.swing.LookAndFeel newLookAndFeel)`	Sets the application look and feel to the given LaF using `UIManager.setLookAndFeel(javax.swing.LookAndFeel)`.
`static void`	`setUseNativeWindowDecorations(boolean enabled)`	Sets whether native window decorations are enabled.
`static void`	`showMnemonics(java.awt.Component c)`
`static boolean`	`supportsNativeWindowDecorations()`	Returns whether native window decorations are supported on current platform.
`void`	`uninitialize()`
`static void`	`unregisterCustomDefaultsSource(java.io.File folder)`
`static void`	`unregisterCustomDefaultsSource(java.lang.String packageName)`
`static void`	`unregisterCustomDefaultsSource(java.lang.String packageName, java.lang.ClassLoader classLoader)`
`static void`	`unregisterCustomDefaultsSource(java.net.URL packageUrl)`
`void`	`unregisterUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object> uiDefaultsGetter)`	Unregisters a UI defaults getter function that was invoked before the standard getter.
`static void`	`updateUI()`	Update UI of all application windows immediately.
`static void`	`updateUILater()`	Update UI of all application windows later.

Methods inherited from class javax.swing.plaf.basic.BasicLookAndFeel
createAudioAction, getAudioActionMap, initClassDefaults, initComponentDefaults, initSystemColorDefaults, loadSystemColors, playSound

Methods inherited from class javax.swing.LookAndFeel
getDescription, getDesktopPropertyValue, getDisabledSelectedIcon, getLayoutStyle, getName, installBorder, installColors, installColorsAndFont, installProperty, loadKeyBindings, makeComponentInputMap, makeIcon, makeInputMap, makeKeyBindings, provideErrorFeedback, toString, uninstallBorder

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - DESKTOPFONTHINTS
```
private static final java.lang.String DESKTOPFONTHINTS
```
    See Also:
    
    Constant Field Values
  - customDefaultsSources
```
private static java.util.List<java.lang.Object> customDefaultsSources
```
  - globalExtraDefaults
```
private static java.util.Map<java.lang.String,java.lang.String> globalExtraDefaults
```
  - extraDefaults
```
private java.util.Map<java.lang.String,java.lang.String> extraDefaults
```
  - systemColorGetter
```
private static java.util.function.Function<java.lang.String,java.awt.Color> systemColorGetter
```
  - uiKeyPlatformPrefixes
```
private static java.util.Set<java.lang.String> uiKeyPlatformPrefixes
```
  - uiKeySpecialPrefixes
```
private static java.util.Set<java.lang.String> uiKeySpecialPrefixes
```
  - desktopPropertyName
```
private java.lang.String desktopPropertyName
```
  - desktopPropertyName2
```
private java.lang.String desktopPropertyName2
```
  - desktopPropertyListener
```
private java.beans.PropertyChangeListener desktopPropertyListener
```
  - aquaLoaded
```
private static boolean aquaLoaded
```
  - updateUIPending
```
private static boolean updateUIPending
```
  - oldPopupFactory
```
private javax.swing.PopupFactory oldPopupFactory
```
  - mnemonicHandler
```
private MnemonicHandler mnemonicHandler
```
  - subMenuUsabilityHelperInstalled
```
private boolean subMenuUsabilityHelperInstalled
```
  - linuxPopupMenuCanceler
```
private LinuxPopupMenuCanceler linuxPopupMenuCanceler
```
  - postInitialization
```
private java.util.function.Consumer<javax.swing.UIDefaults> postInitialization
```
  - uiDefaultsGetters
```
private java.util.List<java.util.function.Function<java.lang.Object,java.lang.Object>> uiDefaultsGetters
```
  - preferredFontFamily
```
private static java.lang.String preferredFontFamily
```
  - preferredLightFontFamily
```
private static java.lang.String preferredLightFontFamily
```
  - preferredSemiboldFontFamily
```
private static java.lang.String preferredSemiboldFontFamily
```
  - preferredMonospacedFontFamily
```
private static java.lang.String preferredMonospacedFontFamily
```
  - NULL_VALUE
```
public static final java.lang.Object NULL_VALUE
```
    Special value returned by functions used in runWithUIDefaultsGetter(Function, Runnable) or registerUIDefaultsGetter(Function) to indicate that the UI value should become null.
    
    Since:
    
    1.6
    
    See Also:
    
    runWithUIDefaultsGetter(Function, Runnable), registerUIDefaultsGetter(Function)
- Constructor Detail
  - FlatLaf
```
public FlatLaf()
```
- Method Detail
  - disableWindowsD3Donscreen
```
public static void disableWindowsD3Donscreen()
```
    Disable usage of Windows Direct3D (DirectX) onscreen surfaces because this may lead to repaint issues (ghosting) on some systems (probably depending on graphics card/driver). Problem occurs usually when a small heavy-weight popup window (menu, combobox, tooltip) is shown.
    Sets system property sun.java2d.d3d.onscreen to false, but only if sun.java2d.d3d.onscreen, sun.java2d.d3d and sun.java2d.noddraw are not yet set.
    Note: Must be invoked very early before the graphics environment is created.
    This method is automatically invoked when loading this class, which is usually before the graphics environment is created. E.g. when doing FlatLightLaf.setup() or UIManager.setLookAndFeel( "com.formdev.flatlaf.FlatLightLaf" ).
    However, it may be invoked too late if you use some methods from UIManager of GraphicsEnvironment before setting look and feel. E.g. UIManager.put(Object, Object). In that case invoke this method yourself very early.
    Tip: How to find out when the graphics environment is created? Set a breakpoint at constructor of class GraphicsEnvironment and look at the stack.
    
    Since:
    
    3.5.2
  - setup
```
public static boolean setup(javax.swing.LookAndFeel newLookAndFeel)
```
    Sets the application look and feel to the given LaF using UIManager.setLookAndFeel(javax.swing.LookAndFeel).
    
    Since:
    
    1.2
  - install
```
@Deprecated
public static boolean install(javax.swing.LookAndFeel newLookAndFeel)
```
    Deprecated.
    use setup(LookAndFeel) instead; this method will be removed in a future version
  - installLafInfo
```
public static void installLafInfo(java.lang.String lafName,
                                  java.lang.Class<? extends javax.swing.LookAndFeel> lafClass)
```
    Adds the given look and feel to the set of available look and feels.
    Useful if your application uses UIManager.getInstalledLookAndFeels() to query available LaFs and display them to the user in a combobox.
  - getID
```
public java.lang.String getID()
```
    Returns the look and feel identifier.
    Syntax: "FlatLaf - ${theme-name}"
    Use UIManager.getLookAndFeel().getID().startsWith( "FlatLaf" ) to check whether the current look and feel is FlatLaf.
    
    Specified by:
    
    getID in class javax.swing.LookAndFeel
  - isDark
```
public abstract boolean isDark()
```
  - isLafDark
```
public static boolean isLafDark()
```
    Checks whether the current look and feel is dark.
  - getSupportsWindowDecorations
```
public boolean getSupportsWindowDecorations()
```
    Returns whether FlatLaf supports custom window decorations. This depends on the operating system and on the used Java runtime.
    This method returns true on Windows 10/11 (see exception below) and on Linux, otherwise returns false.
    Returns also false on Windows 10/11 if FlatLaf native window border support is available (requires Windows 10/11).
    In these cases, custom decorations are enabled by the root pane. Usage of JFrame.setDefaultLookAndFeelDecorated(boolean) or JDialog.setDefaultLookAndFeelDecorated(boolean) is not necessary.
    
    Overrides:
    
    getSupportsWindowDecorations in class javax.swing.LookAndFeel
  - isNativeLookAndFeel
```
public boolean isNativeLookAndFeel()
```
    Specified by:
    
    isNativeLookAndFeel in class javax.swing.LookAndFeel
  - isSupportedLookAndFeel
```
public boolean isSupportedLookAndFeel()
```
    Specified by:
    
    isSupportedLookAndFeel in class javax.swing.LookAndFeel
  - getDisabledIcon
```
public javax.swing.Icon getDisabledIcon(javax.swing.JComponent component,
                                        javax.swing.Icon icon)
```
    Overrides:
    
    getDisabledIcon in class javax.swing.LookAndFeel
  - initialize
```
public void initialize()
```
    Overrides:
    
    initialize in class javax.swing.plaf.basic.BasicLookAndFeel
  - uninitialize
```
public void uninitialize()
```
    Overrides:
    
    uninitialize in class javax.swing.plaf.basic.BasicLookAndFeel
  - initializeAqua
```
private void initializeAqua()
```
    Initialize Aqua LaF on macOS, which is required for using Mac screen menubar. (at least on Java 8, since 9 it seems to work without it)
    This loads the native library "osxui" and initializes JRSUI. Because both are not unloaded/uninitialized, Aqua LaF is initialized only once.
  - getDefaults
```
public javax.swing.UIDefaults getDefaults()
```
    Overrides:
    
    getDefaults in class javax.swing.plaf.basic.BasicLookAndFeel
  - applyAdditionalProperties
```
void applyAdditionalProperties(java.util.Properties properties)
```
  - getLafClassesForDefaultsLoading
```
protected java.util.List<java.lang.Class<?>> getLafClassesForDefaultsLoading()
```
  - getAdditionalDefaults
```
protected java.util.Properties getAdditionalDefaults()
```
  - initResourceBundle
```
private void initResourceBundle(javax.swing.UIDefaults defaults,
                                java.lang.String bundleName)
```
  - initFonts
```
private void initFonts(javax.swing.UIDefaults defaults)
```
  - initDefaultFont
```
private void initDefaultFont(javax.swing.UIDefaults defaults)
```
  - createCompositeFont
```
static javax.swing.plaf.FontUIResource createCompositeFont(java.lang.String family,
                                                           int style,
                                                           int size)
```
  - createActiveFontValue
```
public static javax.swing.UIDefaults.ActiveValue createActiveFontValue(float scaleFactor)
```
    Since:
    
    1.1
  - initIconColors
```
public static void initIconColors(javax.swing.UIDefaults defaults,
                                  boolean dark)
```
    Adds the default color palette for action icons and object icons to the given UIDefaults.
    This method is public and static to allow using the color palette with other LaFs (e.g. Windows LaF). To do so invoke: FlatLaf.initIconColors( UIManager.getLookAndFeelDefaults(), false ); after UIManager.setLookAndFeel( ... );.
    The colors are based on IntelliJ Platform Action icons and Noun icons
    These colors may be changed by IntelliJ Platform themes.
  - addLazyUIdelegateClassLoading
```
private static void addLazyUIdelegateClassLoading(javax.swing.UIDefaults defaults)
```
    Handle UI delegate classes if running in special application where multiple class loaders are involved. E.g. in Eclipse plugin or in LibreOffice extension.
    Problem: Swing runs in Java's system classloader and FlatLaf is loaded in plugin classloader. When Swing tries to load UI delegate class in UIDefaults.getUIClass(String, ClassLoader), invoked from UIDefaults.getUI(JComponent), it uses the component's classloader, which is Java's system classloader for core Swing components, and can not find FlatLaf UI delegates.
    Solution: Add lazy values for UI delegate class names. Those lazy values use FlatLaf classloader to load UI delegate class. This is similar to what UIDefaults.getUIClass(String, ClassLoader) does.
    Not using defaults.put( "ClassLoader", FlatLaf.class.getClassLoader() ), which would work for FlatLaf UI delegates, but it would break custom UI delegates used in other classloaders.
  - putAATextInfo
```
private void putAATextInfo(javax.swing.UIDefaults defaults)
```
  - fallbackAATextInfo
```
private java.lang.Object fallbackAATextInfo()
```
  - putDefaults
```
private void putDefaults(javax.swing.UIDefaults defaults,
                         java.lang.Object value,
                         java.lang.String... keys)
```
  - getCustomDefaultsSources
```
static java.util.List<java.lang.Object> getCustomDefaultsSources()
```
  - registerCustomDefaultsSource
```
public static void registerCustomDefaultsSource(java.lang.String packageName)
```
    Registers a package where FlatLaf searches for properties files with custom UI defaults.
    This can be used to specify application specific UI defaults that override UI values of existing themes or to define own UI values used in custom controls.
    There may be multiple properties files in that package for multiple themes. The properties file name must match the used theme class names. E.g. FlatLightLaf.properties for class FlatLightLaf or FlatDarkLaf.properties for class FlatDarkLaf. FlatLaf.properties is loaded first for all themes.
    These properties files are loaded after theme and addon properties files and can therefore override all UI defaults.
    Invoke this method before setting the look and feel.
    If using Java modules, the package must be opened in module-info.java. Otherwise, use registerCustomDefaultsSource(URL).
    
    Parameters:
    
    packageName - a package name (e.g. "com.myapp.resources")
  - unregisterCustomDefaultsSource
```
public static void unregisterCustomDefaultsSource(java.lang.String packageName)
```
  - registerCustomDefaultsSource
```
public static void registerCustomDefaultsSource(java.lang.String packageName,
                                                java.lang.ClassLoader classLoader)
```
    Registers a package where FlatLaf searches for properties files with custom UI defaults.
    See registerCustomDefaultsSource(String) for details.
    
    Parameters:
    
    packageName - a package name (e.g. "com.myapp.resources")
    
    classLoader - a class loader used to find resources, or null
  - unregisterCustomDefaultsSource
```
public static void unregisterCustomDefaultsSource(java.lang.String packageName,
                                                  java.lang.ClassLoader classLoader)
```
  - registerCustomDefaultsSource
```
public static void registerCustomDefaultsSource(java.net.URL packageUrl)
```
    Registers a package where FlatLaf searches for properties files with custom UI defaults.
    See registerCustomDefaultsSource(String) for details.
    This method is useful if using Java modules and the package containing the properties files is not opened in module-info.java. E.g. FlatLaf.registerCustomDefaultsSource( MyApp.class.getResource( "/com/myapp/themes/" ) ).
    
    Parameters:
    
    packageUrl - a package URL
    
    Since:
    
    2
  - unregisterCustomDefaultsSource
```
public static void unregisterCustomDefaultsSource(java.net.URL packageUrl)
```
    Since:
    
    2
  - registerCustomDefaultsSource
```
public static void registerCustomDefaultsSource(java.io.File folder)
```
    Registers a folder where FlatLaf searches for properties files with custom UI defaults.
    See registerCustomDefaultsSource(String) for details.
    
    Parameters:
    
    folder - a folder
  - unregisterCustomDefaultsSource
```
public static void unregisterCustomDefaultsSource(java.io.File folder)
```
  - getGlobalExtraDefaults
```
public static java.util.Map<java.lang.String,java.lang.String> getGlobalExtraDefaults()
```
    Gets global extra UI defaults; or null.
    
    Since:
    
    2
  - setGlobalExtraDefaults
```
public static void setGlobalExtraDefaults(java.util.Map<java.lang.String,java.lang.String> globalExtraDefaults)
```
    Sets global extra UI defaults, which are only used when setting up the application look and feel. E.g. using UIManager.setLookAndFeel(LookAndFeel) or setup(LookAndFeel).
    The global extra defaults are useful for smaller additional defaults that may change. Otherwise, FlatLaf properties files should be used. See registerCustomDefaultsSource(String).
    The keys and values are strings in same format as in FlatLaf properties files.
    Sample that setups "FlatLaf Light" theme with white background color:
    FlatLaf.setGlobalExtraDefaults( Collections.singletonMap( "@background", "#fff" ) ); FlatLightLaf.setup();
    Since:
    
    2
    
    See Also:
    
    setExtraDefaults(Map)
  - getExtraDefaults
```
public java.util.Map<java.lang.String,java.lang.String> getExtraDefaults()
```
    Gets extra UI defaults; or null.
    
    Since:
    
    2
  - setExtraDefaults
```
public void setExtraDefaults(java.util.Map<java.lang.String,java.lang.String> extraDefaults)
```
    Sets extra UI defaults, which are only used when setting up the application look and feel. E.g. using UIManager.setLookAndFeel(LookAndFeel) or setup(LookAndFeel).
    The extra defaults are useful for smaller additional defaults that may change. Otherwise, FlatLaf properties files should be used. See registerCustomDefaultsSource(String).
    The keys and values are strings in same format as in FlatLaf properties files.
    Sample that setups "FlatLaf Light" theme with white background color:
    FlatLaf laf = new FlatLightLaf(); laf.setExtraDefaults( Collections.singletonMap( "@background", "#fff" ) ); FlatLaf.setup( laf );
    Since:
    
    2
    
    See Also:
    
    setGlobalExtraDefaults(Map)
  - parseDefaultsValue
```
public static java.lang.Object parseDefaultsValue(java.lang.String key,
                                                  java.lang.String value,
                                                  java.lang.Class<?> valueType)
                                           throws java.lang.IllegalArgumentException
```
    Parses a UI defaults value string and converts it into a binary object.
    See: https://www.formdev.com/flatlaf/properties-files/
    
    Parameters:
    
    key - the key, which is used to determine the value type if parameter valueType is null
    
    value - the value string
    
    valueType - the expected value type, or null
    
    Returns:
    
    the binary value
    
    Throws:
    
    java.lang.IllegalArgumentException - on syntax errors
    
    Since:
    
    2
  - getSystemColorGetter
```
public static java.util.function.Function<java.lang.String,java.awt.Color> getSystemColorGetter()
```
    Returns the system color getter function, or null.
    
    Since:
    
    3
  - setSystemColorGetter
```
public static void setSystemColorGetter(java.util.function.Function<java.lang.String,java.awt.Color> systemColorGetter)
```
    Sets a system color getter function that is invoked when function systemColor() is used in FlatLaf properties files.
    The name of the system color is passed as parameter to the function. The function should return null for unknown system colors.
    Can be used to change the accent color:
    FlatLaf.setSystemColorGetter( name -> { return name.equals( "accent" ) ? Color.red : null; } ); FlatLightLaf.setup();
    Since:
    
    3
  - getUIKeyLightOrDarkPrefix
```
public static java.lang.String getUIKeyLightOrDarkPrefix(boolean dark)
```
    Returns UI key prefix, used in FlatLaf properties files, for light or dark themes. Return value is either [light] or [dark].
    
    Since:
    
    3.6
  - getUIKeyPlatformPrefixes
```
public static java.util.Set<java.lang.String> getUIKeyPlatformPrefixes()
```
    Returns set of UI key prefixes, used in FlatLaf properties files, for current platform. If UI keys in properties files start with a prefix (e.g. [someprefix]Button.background), then they are only used if that prefix is contained in this set (or is one of [light] or [dark] depending on current theme).
    By default, the set contains one or more of following prefixes:
    
    [win] on Windows
    [mac] on macOS
    [linux] on Linux
    [unknown] on other platforms
    [gnome] on Linux with GNOME desktop environment
    [kde] on Linux with KDE desktop environment
    on Linux, the value of the environment variable XDG_CURRENT_DESKTOP, split at colons and converted to lower case (e.g. if value of XDG_CURRENT_DESKTOP is ubuntu:GNOME, then [ubuntu] and [gnome])
    
    You can add own prefixes to the set. The prefixes must start with '[' and end with ']' characters, otherwise they will be ignored.
    Since:
    
    3.6
  - getUIKeySpecialPrefixes
```
public static java.util.Set<java.lang.String> getUIKeySpecialPrefixes()
```
    Returns set of special UI key prefixes, used in FlatLaf properties files. Unlike other prefixes, properties with special prefixes are preserved. You can access them using `UIManager`. E.g. `UIManager.get( "[someSpecialPrefix]someKey" )`.
    By default, the set contains following special prefixes:
    
    [style]
    
    You can add own prefixes to the set. The prefixes must start with '[' and end with ']' characters, otherwise they will be ignored.
    Since:
    
    3.6
  - reSetLookAndFeel
```
private static void reSetLookAndFeel()
```
  - updateUI
```
public static void updateUI()
```
    Update UI of all application windows immediately. Invoke after changing LaF.
  - updateUILater
```
public static void updateUILater()
```
    Update UI of all application windows later.
  - supportsNativeWindowDecorations
```
public static boolean supportsNativeWindowDecorations()
```
    Returns whether native window decorations are supported on current platform.
    This requires Windows 10/11, but may be disabled if running in special environments (JetBrains Projector, Webswing or WinPE) or if loading native library fails. If system property FlatSystemProperties.USE_WINDOW_DECORATIONS is set to false, then this method also returns false.
    
    Since:
    
    1.1.2
  - isUseNativeWindowDecorations
```
public static boolean isUseNativeWindowDecorations()
```
    Returns whether native window decorations are enabled.
    
    Since:
    
    1.1.2
  - setUseNativeWindowDecorations
```
public static void setUseNativeWindowDecorations(boolean enabled)
```
    Sets whether native window decorations are enabled.
    Existing frames and dialogs will be updated.
    
    Since:
    
    1.1.2
  - revalidateAndRepaintAllFramesAndDialogs
```
public static void revalidateAndRepaintAllFramesAndDialogs()
```
    Revalidate and repaint all displayable frames and dialogs.
    Useful to update UI after changing TitlePane.menuBarEmbedded.
    
    Since:
    
    1.1.2
  - repaintAllFramesAndDialogs
```
public static void repaintAllFramesAndDialogs()
```
    Repaint all displayable frames and dialogs.
    Useful to update UI after changing TitlePane.unifiedBackground, MenuItem.selectionType or Component.hideMnemonics.
    
    Since:
    
    1.1.2
  - isDisplayableFrameOrDialog
```
private static boolean isDisplayableFrameOrDialog(java.awt.Window w)
```
  - isShowMnemonics
```
public static boolean isShowMnemonics()
```
  - showMnemonics
```
public static void showMnemonics(java.awt.Component c)
```
  - hideMnemonics
```
public static void hideMnemonics()
```
  - equals
```
public final boolean equals(java.lang.Object obj)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public final int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - registerUIDefaultsGetter
```
public void registerUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object> uiDefaultsGetter)
```
    Registers a UI defaults getter function that is invoked before the standard getter. This allows using different UI defaults for special purposes (e.g. using multiple themes at the same time).
    The key is passed as parameter to the function. If the function returns null, then the next registered function is invoked. If all registered functions return null, then the current look and feel is asked. If the function returns NULL_VALUE, then the UI value becomes null.
    
    Since:
    
    1.6
    
    See Also:
    
    unregisterUIDefaultsGetter(Function), runWithUIDefaultsGetter(Function, Runnable)
  - unregisterUIDefaultsGetter
```
public void unregisterUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object> uiDefaultsGetter)
```
    Unregisters a UI defaults getter function that was invoked before the standard getter.
    
    Since:
    
    1.6
    
    See Also:
    
    registerUIDefaultsGetter(Function), runWithUIDefaultsGetter(Function, Runnable)
  - runWithUIDefaultsGetter
```
public static void runWithUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object> uiDefaultsGetter,
                                           java.lang.Runnable runnable)
```
    Registers a UI defaults getter function that is invoked before the standard getter, runs the given runnable and unregisters the UI defaults getter function again. This allows using different UI defaults for special purposes (e.g. using multiple themes at the same time). If the current look and feel is not FlatLaf, then the getter is ignored and the given runnable invoked.
    The key is passed as parameter to the function. If the function returns null, then the next registered function is invoked. If all registered functions return null, then the current look and feel is asked. If the function returns NULL_VALUE, then the UI value becomes null.
    Example:
    // create secondary theme UIDefaults darkDefaults = new FlatDarkLaf().getDefaults(); // create panel using secondary theme FlatLaf.runWithUIDefaultsGetter( key -> { Object value = darkDefaults.get( key ); return (value != null) ? value : FlatLaf.NULL_VALUE; }, () -> { // TODO create components that should use secondary theme here } );
    Since:
    
    1.6
    
    See Also:
    
    registerUIDefaultsGetter(Function), unregisterUIDefaultsGetter(Function)
  - getStyleableInfos
```
public static java.util.Map<java.lang.String,java.lang.Class<?>> getStyleableInfos(javax.swing.JComponent c)
```
    Returns information about styleable values of a component.
    This is equivalent to: ((StyleableUI)c.getUI()).getStyleableInfos(c)
    
    Since:
    
    2.5
  - getStyleableValue
```
public static <T> T getStyleableValue(javax.swing.JComponent c,
                                      java.lang.String key)
```
    Returns the (styled) value for the given key from the given component.
    This is equivalent to: ((StyleableUI)c.getUI()).getStyleableValue(c, key)
    
    Since:
    
    2.5
  - getPreferredFontFamily
```
public static java.lang.String getPreferredFontFamily()
```
    Returns the preferred font family to be used for (nearly) all fonts; or null.
    
    Since:
    
    3
  - setPreferredFontFamily
```
public static void setPreferredFontFamily(java.lang.String preferredFontFamily)
```
    Sets the preferred font family to be used for (nearly) all fonts.
    Note: This must be invoked before setting the application look and feel.
    
    Since:
    
    3
  - getPreferredLightFontFamily
```
public static java.lang.String getPreferredLightFontFamily()
```
    Returns the preferred font family to be used for "light" fonts; or null.
    
    Since:
    
    3
  - setPreferredLightFontFamily
```
public static void setPreferredLightFontFamily(java.lang.String preferredLightFontFamily)
```
    Sets the preferred font family to be used for "light" fonts.
    Note: This must be invoked before setting the application look and feel.
    
    Since:
    
    3
  - getPreferredSemiboldFontFamily
```
public static java.lang.String getPreferredSemiboldFontFamily()
```
    Returns the preferred font family to be used for "semibold" fonts; or null.
    
    Since:
    
    3
  - setPreferredSemiboldFontFamily
```
public static void setPreferredSemiboldFontFamily(java.lang.String preferredSemiboldFontFamily)
```
    Sets the preferred font family to be used for "semibold" fonts.
    Note: This must be invoked before setting the application look and feel.
    
    Since:
    
    3
  - getPreferredMonospacedFontFamily
```
public static java.lang.String getPreferredMonospacedFontFamily()
```
    Returns the preferred font family to be used for monospaced fonts; or null.
    
    Since:
    
    3
  - setPreferredMonospacedFontFamily
```
public static void setPreferredMonospacedFontFamily(java.lang.String preferredMonospacedFontFamily)
```
    Sets the preferred font family to be used for monospaced fonts.
    Note: This must be invoked before setting the application look and feel.
    
    Since:
    
    3

Class FlatLaf

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class javax.swing.plaf.basic.BasicLookAndFeel

Methods inherited from class javax.swing.LookAndFeel

Methods inherited from class java.lang.Object

Field Detail

DESKTOPFONTHINTS

customDefaultsSources

globalExtraDefaults

extraDefaults

systemColorGetter

uiKeyPlatformPrefixes

uiKeySpecialPrefixes

desktopPropertyName

desktopPropertyName2

desktopPropertyListener

aquaLoaded

updateUIPending

oldPopupFactory

mnemonicHandler

subMenuUsabilityHelperInstalled

linuxPopupMenuCanceler

postInitialization

uiDefaultsGetters

preferredFontFamily

preferredLightFontFamily

preferredSemiboldFontFamily

preferredMonospacedFontFamily

NULL_VALUE

Constructor Detail

FlatLaf

Method Detail

disableWindowsD3Donscreen

setup

install

installLafInfo

getID

isDark

isLafDark

getSupportsWindowDecorations

isNativeLookAndFeel

isSupportedLookAndFeel

getDisabledIcon

initialize

uninitialize

initializeAqua

getDefaults

applyAdditionalProperties

getLafClassesForDefaultsLoading

getAdditionalDefaults

initResourceBundle

initFonts

initDefaultFont

createCompositeFont

createActiveFontValue

initIconColors

addLazyUIdelegateClassLoading

putAATextInfo

fallbackAATextInfo

putDefaults

getCustomDefaultsSources

registerCustomDefaultsSource

unregisterCustomDefaultsSource

registerCustomDefaultsSource

unregisterCustomDefaultsSource

registerCustomDefaultsSource

unregisterCustomDefaultsSource

registerCustomDefaultsSource

unregisterCustomDefaultsSource

getGlobalExtraDefaults

setGlobalExtraDefaults

getExtraDefaults

setExtraDefaults

parseDefaultsValue

getSystemColorGetter

setSystemColorGetter

getUIKeyLightOrDarkPrefix