import java.awt.*;import java.awt.event.*;
import java.util.Vector;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class AddRemoveCells implements ActionListener{
   JTable table = null;
   DefaultTableModel defaultModel = null;
   public AddRemoveCells(){
      JFrame f = new JFrame();
      String[] name = {"1","2","3","4","5"};
      String[][] data = new String[5][5];
      int value = 1;
      for(int i=0;i<data.length;i++){
         for(int j=0;j<data[i].length;j++)
            data[i][j] = String.valueOf(value++);
      }
      defaultModel = new DefaultTableModel(data,name);
      table = new JTable(defaultModel);
      table.setPreferredScrollableViewportSize(new Dimension(400,80));
      JScrollPane s = new JScrollPane(table);
      
      JPanel panel = new JPanel();
      JButton b = new JButton("增加列");
      panel.add(b);
      b.addActionListener(this);
      
      JButton o = new JButton("删除行");
      panel.add(o);
      o.addActionListener(this);
      
      b = new JButton("增加行");
      panel.add(b);
      b.addActionListener(this);
      b = new JButton("删除列");
      panel.add(b);
      b.addActionListener(this);
      
      Container contentPane = f.getContentPane();
      contentPane.add(panel, BorderLayout.NORTH);
      contentPane.add(s,BorderLayout.CENTER);
      
      f.setTitle("AddR");
      f.pack();
      f.setVisible(true);
      f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
   }
   @SuppressWarnings("unchecked")
   public void actionPerformed(ActionEvent e){
      if(e.getActionCommand().equals("增加列"))
         defaultModel.addColumn("增加列");
      if(e.getActionCommand().equals("增加行"))
         defaultModel.addRow(new Vector());
      if(e.getActionCommand().equals("删除列")){
         int columncount = defaultModel.getColumnCount()-1;
         if(columncount >=0){
            TableColumnModel columnModel = table.getColumnModel();
            TableColumn tableColumn = columnModel.getColumn(columncount);
            columnModel.removeColumn(tableColumn);
            defaultModel.setColumnCount(columncount);
         }
      }
      if(e.getActionCommand().equals("删除行")){
         int rowcount = defaultModel.getRowCount()-1;
         if(rowcount >= 0){
            defaultModel.removeRow(rowcount);
            defaultModel.setRowCount(rowcount);
         }       
      }
     table.revalidate();  //这句好象没用到？？？？
   }
   public static void main(String args[]){
      new AddRemoveCells();
   }

}