JTable的使用

Question

请问如何用JTable 实现鼠标单击表格并获取表格的值输出在界面文本框里？

Answer 1

重点参考代码中这一行的事件处理：
  table.getModel().addTableModelListener(new TableModelListener()import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JToolTip;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;/**
 * 主窗口 
 */
public class TestJTable extends JFrame {    private JTable table = new JTable(20, 6) {
        // 自定义ToolTips
        public JToolTip createToolTip() {
            JToolTip tip = super.createToolTip();
            tip.setLayout(new BorderLayout());
            tip.add(new JButton("Hello"), BorderLayout.NORTH);
            tip.add(new JButton("Hello"), BorderLayout.SOUTH);
            tip.setPreferredSize(new Dimension(300, 200));
            return tip;
        }
    };    public TestJTable() {
        this.setSize(800, 600);        // 预置ToolTip
        table.setToolTipText("");        // 借助事件监听，实现单元格自动计算 6=4+5
        table.getModel().addTableModelListener(new TableModelListener() {
            public void tableChanged(TableModelEvent e) {
                int col = e.getColumn();
                int row = e.getFirstRow();
                if (col == 3 || col == 4) { // 因为列数从0开始算，所以要减一
                    double v4 = 0;
                    try {
                        v4 = Double.valueOf(String.valueOf(table.getValueAt(row, 3)));
                    } catch (NumberFormatException ex) {
                    }
                    double v5 = 0;
                    try {
                        v5 = Double.valueOf(String.valueOf(table.getValueAt(row, 4)));
                    } catch (NumberFormatException ex) {
                    }
                    table.setValueAt(v4 + v5, row, 5);
                }
            }
        });
        this.add(table, BorderLayout.CENTER);        // 弹出新窗口，显示所选中行的数据
        JButton btnNewFrame = new JButton("Popup new JFrame");
        btnNewFrame.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                // 先获得所选中行的数据
                Object[] data = getSelectedRowData();
                // 构造弹出窗口，并将数据传递进去
                PopupFrame frm = new PopupFrame(data);
                // 显示该窗口
                frm.setVisible(true);
            }
        });
        this.add(btnNewFrame, BorderLayout.SOUTH);
    }    public Object[] getSelectedRowData() {
        int colummCount = table.getModel().getColumnCount();// 列数
        Object[] objs = new Object[colummCount];
        for (int i = 0; i < colummCount; i++) {
            objs[i] = table.getModel().getValueAt(table.getSelectedRow(), i);
        }
        return objs;
    }    public static void main(String[] args) {
        TestJTable wnd = new TestJTable();
        wnd.setDefaultCloseOperation(EXIT_ON_CLOSE);
        wnd.setVisible(true);
    }}/**
 * 弹出窗口
 */
class PopupFrame extends JFrame {
    public PopupFrame(Object[] data) {
        this.setSize(400, 300);
        this.setLayout(new FlowLayout());
        // 借助JLabel，循环把数据都显示出来
        for (int i = 0; i < data.length; i++) {
            JLabel lbl = new JLabel(String.valueOf(data[i])); 
            this.add(lbl);
        }
        JButton btnTest = new JButton("CountWindowsNumber");
        btnTest.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Window[] wnds = Window.getWindows();
                for (Window wnd : wnds) {
                    System.out.println(wnd.getName() + "\t" + wnd.getClass());
                }
            }
        });
        this.add(btnTest);
    }
}

Answer 2

        table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
            @Override
            public void valueChanged(ListSelectionEvent event) {
                if (!event.getValueIsAdjusting()) {
                    TableModel model = table.getModel();
                    int row = table.getSelectedRow();
                    int column = table.getSelectedColumn();
                    System.out.println(model.getValueAt(row, column));
                }
            }
        });

Answer 3

你是要让别给你做作业吧！
都把最难的部分给你弄出来了，剩下的那一点都不会做？
写个界面，然后在上面输出的部分用textArea.setText(..)都懒得动手吗！