import javax.swing.*;importjavax.swing.table.DefaultTableModel;import java.awt.*;importjava.awt.event.ActionEvent;importjava.awt.event.ActionListener;public class Demo extends JFrame {//窗体类

private DefaultTableModel model;//表格模型

private JTable table;//表格

private JButton addButton, delButton, updButton;//增删改三个按钮

private JTextField aTextField, bTextField;//按钮旁边的输入框

public Demo() {//窗体构造方法

setTitle("表格模型");

setBounds(100, 100, 400, 200);

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

String[] columnNames= {"A", "B"};//定义表格列名

String[][] tableValues = {{"A1", "B1"}, {"A2", "B2"}, {"A3", "B3"}};//表格内容

model= new DefaultTableModel(tableValues, columnNames);//设置模型

table = new JTable(model);//引用模型，或table.setModel(model);

JScrollPane sc = newJScrollPane(table);

getContentPane().add(sc, BorderLayout.CENTER);

buttonInit();//调用按钮，按钮初始化

addMyListener();//组件的监听事件

}private voidbuttonInit() {final JPanel panel = new JPanel();//内部默认流布局

getContentPane().add(panel, BorderLayout.SOUTH);

panel.add(new JLabel("A:"));

aTextField= new JTextField("A4", 5);//文本框的内容和宽度

panel.add(aTextField);

panel.add(new Label("B:"));

bTextField= new JTextField("B4", 5);

panel.add(bTextField);

addButton= new JButton("增加");

delButton= new JButton("删除");

updButton= new JButton("修改");

panel.add(addButton);

panel.add(delButton);

panel.add(updButton);

}private voidaddMyListener() {

addButton.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {

String rowData[]={aTextField.getText(), bTextField.getText()};

model.addRow(rowData);//在表格模型中增加一行内容(文本框内容)

int rowCount = table.getRowCount() + 1;//获取当前行数+1

aTextField.setText("A" + rowCount);//文本框中内容增1

bTextField.setText("B" +rowCount);

}

});

updButton.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {int selectedRow = table.getSelectedRow();//获取被选中行的索引

if (selectedRow != -1) {//存在被选中行

model.setValueAt(aTextField.getText(), selectedRow, 0);//修改第1列的值

model.setValueAt(bTextField.getText(), selectedRow, 1);//修改第2列的值

}

}

});

delButton.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {int selectedRow =table.getSelectedRow();if (selectedRow != -1) {

model.removeRow(selectedRow);//删除选中的行

}

}

});

}public static voidmain(String[] args) {

Demo frame= newDemo();

frame.setVisible(true);

}

}