getselectedline在java中使用那个类

`getSelectedLine()`通常在Java的JList或JTable组件中使用，这两个都是Swing库中的列表和表格控件。当你需要获取用户通过鼠标选择的列表项或表格行时，这个方法会派上用场。例如，在JList中：

import javax.swing.JList;
import java.awt.event.ListSelectionEvent;
import java.awt.event.ListSelectionListener;

JList list = new JList();
list.addListSelectionListener(new ListSelectionListener() {
    public void valueChanged(ListSelectionEvent e) {
        int selectedLine = ((DefaultListSelectionModel)e.getSelectionModel()).getSelectedIndex();
        System.out.println("Selected line: " + selectedLine);
    }
});

而在JTable中，你需要通过类似的方式监听`TableSelectionModel`的变化：

import javax.swing.JTable;
import javax.swing.event.TableSelectionEvent;
import javax.swing.event.TableSelectionListener;

JTable table = new JTable();
table.getSelectionModel().addListSelectionListener(new TableSelectionListener() {
    public void valueChanged(TableSelectionEvent e) {
        int[] selectedLines = table.getSelectedRows();
        for (int line : selectedLines) {
            System.out.println("Selected row: " + line);
        }
    }
});