Usage

jvm args:

--add-exports java.desktop/sun.awt.windows=ALL-UNNAMED
--enable-native-access=ALL-UNNAMED
--enable-preview

or in one line.

--add-exports java.desktop/sun.awt.windows=ALL-UNNAMED --enable-native-access=ALL-UNNAMED --enable-preview

AWT/Swing

See top.birthcat.notitlebar.NoTitleBar

NoTitleBar::removeIn
NoTitleBar::tryRemoveIn

Compose Desktop

Same as below, and apply this

Window(undecorated = true)

NoTitleBar::workWithCompose for a fast path for compose

Strange behavior

• Resize window to 0px

In my pc,window border blink when mouse over Button or user input to TextField.
But when I test in other pc,this problem can't reproduce.

Build

Java 21 + Gradle