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2009年4月24日—ItemListenertotheJComboBox.Thelistenerwillbegivenanjava.awt.event.ItemEventwhenevertheitem'sstatechanges.Sowheneveranewitem ...,ReturnstherendererusedtodisplaytheselecteditemintheJComboBoxfield.int,getSelectedIndex().Returnsthefirst...
Why does JCombobox getselectedIndex () always return 0 or
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2021年6月3日—Ifthereisonlyoneiteminthemodel,anditisselected,thengetSelectedIndex()willreturn0becauseJavaisabasezerolanguage.This ...
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