By default, a list allows more than one item to be selected. Also, the selected items need not be contiguous. To change this default, see e781 设置JList中的选择模式.
A list selection event is fired when the set of selected items is changed (see e784 监听对JList选择变动).
// Create a list with some items
String[] items = {"A", "B", "C", "D"};
JList list = new JList(items);
The items can be arbitrary objects. The toString() method of the objects is displayed in the list component.
// Create a list with two items - "123" and "Sun May 19 21:15:38 PDT 2002"
Object[] items2 = {new Integer(123), new java.util.Date()};
list = new JList(items2);
By default, a list does not automatically display a scrollbar when there are more items than can be displayed. The list must be wrapped in a scroll pane:
JScrollPane scrollingList = new JScrollPane(list);
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