查找JList的选定项目并实时显示

一个简单的示例如下所示，使用listselectionlistener

import java.awt.Dimension;import java.awt.FlowLayout;import javax.swing.Jframe;import javax.swing.JLabel;import javax.swing.JList;import javax.swing.event.ListSelectionEvent;import javax.swing.event.ListSelectionListener;public class JListDemo extends Jframe {    public JListDemo() {        setSize(new Dimension(300, 300));        setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);        setLayout(new FlowLayout());        final JLabel label = new JLabel("Update");        String[] data = { "one", "two", "three", "four" };        final JList dataList = new JList(data);        dataList.addListSelectionListener(new ListSelectionListener() { @Override public void valueChanged(ListSelectionEvent arg0) {     if (!arg0.getValueIsAdjusting()) {       label.setText(dataList.getSelectedValue().toString());     } }        });        add(dataList);        add(label);        setVisible(true);    }    public static void main(String args[]) {        new JListDemo();    }}