Visual basic data table to combobox1/11/2024 No matter which constructor you use, a combo box uses a combo box model to contain and manage the items in its menu. To see the action listener implementation and learn about other types of listeners supported by combo box, refer to Handling Events on a Combo Box. The preceding code registers an action listener on the combo box. Refer to Providing a Custom Renderer for information and an example. An editable combo box would also need a custom editor. To put anything else into a combo box or to customize how the items in a combo box look, you need to write a custom renderer. This combo box contains an array of strings, but you could just as easily use icons instead. JComboBox petList = new JComboBox(petStrings) Indices start at 0, so 4 specifies the pig. Create the combo box, select item at index 4. The application shown here uses an uneditable combo box for choosing a pet picture: Lists are not terribly attractive, but they're more appropriate than combo boxes when the number of items is large (say, over 20) or when selecting multiple items might be valid.īecause editable and uneditable combo boxes are so different, this section treats them separately. Groups of radio buttons are generally the easiest for users to understand, but combo boxes can be more appropriate when space is limited or more than a few choices are available. Other components that can display one-of-many choices are groups of radio buttons and lists. Here's what the two forms of combo boxes look like in the Java look and feel:Ĭombo boxes require little screen space, and their editable (text field) form is useful for letting the user quickly choose a value without limiting the user to the displayed values. The user can type a value in the text field or click the button to display a drop-down list. The second form, called the editable combo box, features a text field with a small button abutting it. The default form is the uneditable combo box, which features a button and a drop-down list of values. JComboBox, which lets the user choose one of several choices, can have two very different forms.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |