import javax.swing.JList;
import javax.swing.JScrollPane;
public class Main {
public static void main(String[] argv) throws Exception {
String[] items = { "A", "B", "C", "D" };
JList list = new JList(items);
JScrollPane scrollingList = new JScrollPane(list);
// The default layout orientation is JList.VERTICAL
int orient = list.getLayoutOrientation();
// Change the layout orientation to left-to-right, top-to-bottom
list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
}
}