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[200405041800; j2sdk1.4.2_03] I create j2se project with Main class and MyFrame class. In main method of Main class I just write code 'new MyFrame().show();'. Then I run it and close MyFrame - nothing strange is contained in the frame, just buttons. Sometimes when I close the window the java.lang.IllegalStateException appears in the output window. I am not able to reliably reproduce.
Created attachment 14706 [details] Content of Output Window
IllegalStateExceptio is thrown if the action's state (its visibility) is changed outside of EventQueue. You have to replan firing this change to EQ in form module. See fix of issue 41500.
Fixed - the corresponding code is executed in Event-Dispatch Thread by now.
*** Issue 42546 has been marked as a duplicate of this issue. ***
I haven't seen this issue for a long time - Verified.
*** Issue 42115 has been marked as a duplicate of this issue. ***
*** Issue 49538 has been marked as a duplicate of this issue. ***