java - JScrollPane disappearing on resize -

java - JScrollPane disappearing on resize -

i have content part vertical scroll bar, part of window. exact classes are:

jscrollpane scrollpane1; jeditorpane editorpanecontent; jpanel contentpanel; scrollpane1.setviewportview(editorpanecontent); contentpanel.add(scrollpane1, cc.xy(1, 1));

the scrollbar should not visible, if content small, should not appear. (so far works.)

however if content large, , scrollbar appears, resizing main window (horizontally) create scrollbar disappear. curious, 1 resize makes disappear, resize makes appear again. disappear-appear-disappear in strict order. how can forcefulness scrollbar, appear (only when needed length of content) after resizing main window?

thanks help, sziro.

java swing jscrollpane layout-manager