JTable的實用小例子

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;

import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumnModel;
/**

JTable的實用小例子
*
@author 五斗米 <如轉載請保留作者和出處>
@blog <a href="http://blog.csdn.net/mq612">http://blog.csdn.net/mq612
*/

public class Test {
    private JFrame frame = null;

private JTable table = null;

private Table_Model model = null;

private JScrollPane s_pan = null;

private JButton button_1 = null, button_2 = null, button_3 = null;

private JPanel pane = null;

public Test() {
    frame = new JFrame("JTableTest");
    pane = new JPanel();
    button_1 = new JButton("清除數據");
    button_1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            removeData();
        }
    });
    button_2 = new JButton("添加數據");
    button_2.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            addData();
        }
    });
    button_3 = new JButton("保存數據");
    button_3.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            saveData();
        }
    });
    pane.add(button_1);
    pane.add(button_2);
    pane.add(button_3);
    model = new Table_Model(20);
    table = new JTable(model);
    table.setBackground(Color.white);
    String[] age = { "16", "17", "18", "19", "20", "21", "22" };
    JComboBox com = new JComboBox(age);
    TableColumnModel tcm = table.getColumnModel();
    tcm.getColumn(3).setCellEditor(new DefaultCellEditor(com));
    tcm.getColumn(0).setPreferredWidth(50);
    tcm.getColumn(1).setPreferredWidth(100);
    tcm.getColumn(2).setPreferredWidth(50);

    s_pan = new JScrollPane(table);

    frame.getContentPane().add(s_pan, BorderLayout.CENTER);
    frame.getContentPane().add(pane, BorderLayout.NORTH);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(300, 200);
    frame.setVisible(true);

}

private void addData() {
    model.addRow("李逵", true, "19");
    table.updateUI();
}

private void removeData() {
    model.removeRows(0, model.getRowCount());
    table.updateUI();
}

// 保存數據，暫時是將數據從控制臺顯示出來
private void saveData() {
    int col = model.getColumnCount();
    int row = model.getRowCount();
    for (int i = 0; i < col; i++) {
        System.out.print(model.getColumnName(i) + "\\t");
    }
    System.out.print("\\r\\n");
    for (int i = 0; i < row; i++) {
        for (int j = 0; j < col; j++) {
            System.out.print(model.getValueAt(i, j) + "\\t");
        }
        System.out.print("\\r\\n");
    }
    System.out.println("------------------------------------");
}

public static void main(String args[]) {
    new Test();
    System.out
            .println(

"按下保存按鈕將會把JTable中的內容顯示出來\r\n------------------------------------");
    }
}
/**

TableModel類，繼承了AbstractTableModel
*
@author 五斗米
/
class Table_Model extends AbstractTableModel {
private static final long serialVersionUID = -7495940408592595397L;
private Vector content = null;
private String[] title_name = { "ID", "姓名", "性別", "年齡" };
public Table_Model() {

  content = new Vector();

}
public Table_Model(int count) {

  content = new Vector(count);

}
public void addRow(String name, boolean sex, String age) {

  Vector v = new Vector(4);
  v.add(0, new Integer(content.size()));
  v.add(1, name);
  v.add(2, new Boolean(sex));
  v.add(3, age);
  content.add(v);

}
public void removeRow(int row) {

  content.remove(row);

}
public void removeRows(int row, int count) {

  for (int i = 0; i < count; i++) {
      if (content.size() > row) {
          content.remove(row);
      }
  }

}
/**

讓表格中某些值可修改，但需要setValueAt(Object value, int row, int col)方法配合才能使修改生效
*/
public boolean isCellEditable(int rowIndex, int columnIndex) {
  if (columnIndex == 0) {

  return false;

}
  return true;
}
/**

使修改的內容生效
*/
public void setValueAt(Object value, int row, int col) {
  ((Vector) content.get(row)).remove(col);
  ((Vector) content.get(row)).add(col, value);
  this.fireTableCellUpdated(row, col);
}
public String getColumnName(int col) {
  return title_name[col];
}
public int getColumnCount() {
  return title_name.length;
}
public int getRowCount() {
  return content.size();
}
public Object getValueAt(int row, int col) {
  return ((Vector) content.get(row)).get(col);
}
/**

返回數據類型
*/
public Class getColumnClass(int col) {
  return getValueAt(0, col).getClass();
}
}</pre>