Sometimes you need to access the Windows Registry, the macOS Defaults database or dconf in your Java or Kotlin apps. While the Java standard class library includes the Preferences api to read and write app-specific values, you cannot use it to access system settings. That's what this tiny library is for.
It is very easy to add the library to your project.
<dependency>
<groupId>com.github.tkuenneth</groupId>
<artifactId>nativeparameterstoreaccess</artifactId>
<version>0.1.3</version>
</dependency>dependencies {
implementation("com.github.tkuenneth:nativeparameterstoreaccess:0.1.3")
}
This Kotlin example shows how to detect if the system (macOS, Linux with dconf or Windows) is using a dark theme.
fun isSystemInDarkTheme(): Boolean = when {
IS_WINDOWS -> {
val result = WindowsRegistry.getWindowsRegistryEntry(
"HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
"AppsUseLightTheme")
result == 0x0
}
IS_MACOS -> {
val result = MacOSDefaults.getDefaultsEntry("AppleInterfaceStyle")
result == "Dark"
}
HAS_DCONF -> {
val result = Dconf.getDconfEntry("/org/gnome/desktop/interface/gtk-theme")
result.toLowerCase().contains("dark")
}
else -> false
}