JComboBox.hidePopup() has the following syntax.
public void hidePopup()
In the following code shows how to use JComboBox.hidePopup() method.
//from w w w . j a v a2 s . co m import javax.swing.JComboBox; public class Main { public static void main(String[] argv) throws Exception { String[] items = { "item1", "item2" }; JComboBox cb = new JComboBox(items); cb.hidePopup(); } }