A colleague reports that
self == [super init]
makes no sense in CFileDialog.m
citing
https://www.cocoawithlove.com/2009/04/what-does-it-mean-when-you-assign-super.html
and suggests

src/java.desktop/macosx/native/libawt_lwawt/awt/CFileDialog.m
@@ -46,7 +46,7 @@
 canChooseDirectories:(BOOL)inChooseDirectories
              withEnv:(JNIEnv*)env;
 {
- if (self == [super init]) {
+ if (self = [super init]) {
         fHasFileFilter = inHasFilter;
         fFileDialog = JNFNewGlobalRef(env, inDialog);
         fDirectory = inPath;