FlatLaf - Flat Look and Feel

FlatLaf is a modern open-source cross-platform Look and Feel for Java Swing desktop applications.

It looks almost flat (no shadows or gradients), clean, simple and elegant. FlatLaf comes with Light, Dark, IntelliJ and Darcula themes, scales on HiDPI displays and runs on Java 8 or newer.

The look is heavily inspired by Darcula and IntelliJ themes from IntelliJ IDEA 2019.2+ and uses almost the same colors and icons.

FlatLaf Light
FlatLaf Dark
FlatLaf Light
FlatLaf Dark
FlatLaf Light
FlatLaf Dark
FlatLaf IntelliJ
FlatLaf Darcula
FlatLaf macOS Light
FlatLaf macOS Dark

Features

Light, Dark, IntelliJ and Darcula themes
macOS light and dark themes since v3
can use 3rd party themes developed for IntelliJ Platform
custom window decorations with embedded menu bar (Window 10/11 and Linux only)
highly customizable
typography (predefined header and body fonts)
scales on HiDPI displays
cross-platform
high quality
lightweight (about 800 KB; no dependencies)

minimalistic, elegant and modern
scalable vector icons
discreet hover effects
outer or inner focused border
runs on Java 8 or newer
Java 9 module (module name is com.formdev.flatlaf)
macOS platform specific key bindings
GUI builder friendly
MigLayout compatible

Demo

Run demo with java -jar flatlaf-demo-<version>.jar (or double-click it). Requires Java 8 or newer.

Download

FlatLaf binaries are available on Maven Central.

If you use Maven or Gradle, add a dependency with following coordinates to your build script:

groupId:     com.formdev
artifactId:  flatlaf
version:     (see button below)

Otherwise download flatlaf-<version>.jar here:

See also Native Libraries distribution for instructions on how to redistribute FlatLaf native libraries with your application.

Getting started

To enable FlatLaf, add following code to your main method before you create any Swing component:

FlatLightLaf.setup();

// create UI here...

try {
    UIManager.setLookAndFeel( new FlatLightLaf() );
} catch( Exception ex ) {
    System.err.println( "Failed to initialize LaF" );
}

// create UI here...

Customizing

See Customizing page.

Themes

See Themes page.

Theme Editor

See Theme Editor page.

License

FlatLaf is open source licensed under the Apache 2.0 License

Source code

The FlatLaf source code is hosted on GitHub:
github.com/JFormDesigner/FlatLaf

Issues

Please report issues on GitHub:
github.com/JFormDesigner/FlatLaf/issues