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Change the layout orientation so that its items are displayed top-to-bottom and left-to-right

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);     // Change orientation to top-to-bottom, left-to-right layout     list.setLayoutOrientation(JList.VERTICAL_WRAP);   } }