Java Swing - 如何设置JList的选择模式

import javax.swing.DefaultListSelectionModel;
import javax.swing.JList;

public class Main {
  public static void main(String[] argv) throws Exception {
    String[] items = { "A", "B", "C", "D" };
    JList list = new JList(items);

    // Get the current selection model mode
    int mode = list.getSelectionMode(); // MULTIPLE_INTERVAL_SELECTION

    // Only one item can be selected
    list.setSelectionMode(DefaultListSelectionModel.SINGLE_SELECTION);
  }
}