java - 是否可以在java swing中从ListSelectionEvents中提取字符串？

Question

我在 java swing 中使用字符串的 JList。我想要一个 ListSelectionListener，它返回用户选择的 Listentry 的字符串。但我无法到达字符串本身。我唯一能找到的东西

private void registerListeners()
{
    gui.getListMeasurements().addListSelectionListener(new ListSelectionListener()
    {

        @Override
        public void valueChanged(ListSelectionEvent event)
        {
            System.out.println(event.getSource());

        }
    });
}

输出以下4次:javax.swing.JList[,0,0,240x340,alignmentX=0.0,alignmentY=0.0,border=,flags=50331944,maximumSize=,minimumSize=,preferredSize=,fixedCellHeight=-1, fixedCellWidth=-1，horizo​​ntalScrollIncrement=-1，selectionBackground=javax.swing.plaf.ColorUIResource[r=184，g=207，b=229]，selectionForeground=sun.swing.PrintColorUIResource[r=51，g=51，b =51],visibleRowCount=8,layoutOrientation=0]

此输出中没有任何内容涉及列表中选择的字符串。我也找不到该事件的任何有用的方法。是否可以按照我描述的方式提取字符串？

Answer 1

gui.getListMeasurements().addListSelectionListener(new ListSelectionListener() {
    @Override
    public void valueChanged(ListSelectionEvent e) {
        if (e.getValueIsAdjusting()) {
            return;
        }
        if (e.getSource() instanceof JList) {
            JList list = (JList) e.getSource();
            int index = list.getSelectedIndex();
            Object element = list.getModel().getElementAt(index);
            if (element instanceof String) {
                System.out.println("Selected value at " + index + " = " + element);
            }
        }
    }
});

有用的链接:

• How to Use Lists
• JavaDocs for JList
• How to Write a List Selection Listener
• JavaDocs for ListSelectionListener和 ListSelectionEvent