JTable：没有选定的行

Question

我想在jTable中没有选择任何行时禁用按钮。有没有办法做到这一点？

Answer 1

在JTable上使用SelectionListener。

JTable table = new JTable();
JButton button = new JButton();
button.setEnabled(false);

ListSelectionModel listSelectionModel = table.getSelectionModel();
listSelectionModel.addListSelectionListener(new ListSelectionListener() {
        public void valueChanged(ListSelectionEvent e) { 
            ListSelectionModel lsm = (ListSelectionModel)e.getSource();
            button.setEnabled(!lsm.isSelectionEmpty());
});

Answer 2

这样的事情应该有效：

table.getSelectionModel().addListSelectionListener(new ListSelectionListener()
{
    @Override
    public void valueChanged(ListSelectionEvent e)
    {
        if (!e.getValueIsAdjusting())
        {
            boolean rowsAreSelected = table.getSelectedRowCount() > 0;
            button.setEnabled(rowsAreSelected);
        }
    }
});

Answer 3

为您的表添加选择侦听器。如果出现选择，请启用该按钮。默认情况下禁用按钮。

http://download.oracle.com/javase/6/docs/api/javax/swing/JTable.html