e761. determining if the menu of a jcombobox component is visible.txt

这里面包含了一百多个JAVA源文件

// Create a read-only combobox
    String[] items = {"item1", "item2"};
    JComboBox cb = new JComboBox(items);
    
    // Determine if the menu is visible
    boolean isVisible = cb.isPopupVisible();