Testsuite name: JDK Demos manual
Test name(s): tests/demo/jfc/Java2DTest.html
Product(s) tested: JDK 8u231 b01(64bit)
OS/architecture: Ubuntu19.04 x64
option:-Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel -Djdk.gtk.version=3 -Djdk.gtk.verbose=true

Actual results:
1.The button is displayed incorrectly.Please refer to Java2D-button-with-options.png
2.There is the same issue when maximized the applet.
3.No such issue without option.Please refer to Java2D-button-without-options.png