swing 表格模型增加删除行和列

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package table;import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Vector;import java.util.concurrent.BrokenBarrierException;import javax.swing.*;import javax.swing.table.DefaultTableModel;import javax.swing.table.TableColumnModel;public class Tab1 extends JFrame implements ActionListener{JTable jt1;DefaultTableModel tableM;JScrollPane jsp1;JButton jb1,jb2,jb3,jb4;JPanel jp1;public static void main(String[] args) {new Tab1();}Tab1(){String[] name = new String[]{"列1","列2","列3","列4","列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++);}}//初始化表格模型，设置表头和数据tableM = new DefaultTableModel(data, name);//初始化表格，与模型建立联系jt1 = new JTable(tableM);//把表格放入滚动窗中jsp1 = new JScrollPane(jt1);jb1 = new JButton("添加列");jb2 = new JButton("添加行");jb3 = new JButton("删除列");jb4 = new JButton("删除行");jp1 = new JPanel();this.add(jp1, BorderLayout.SOUTH);jp1.add(jb1);jp1.add(jb2);jp1.add(jb3);jp1.add(jb4);this.add(jsp1);jb1.addActionListener(this);jb2.addActionListener(this);jb3.addActionListener(this);jb4.addActionListener(this);this.setSize(400, 400);this.setVisible(true);this.setDefaultCloseOperation(EXIT_ON_CLOSE);}@Override//进行增加，删除表格都是对表格模型操作，与table无关public void actionPerformed(ActionEvent e) {if (e.getSource().equals(jb1)){tableM.addColumn("新增列");}//新增一行if (e.getSource().equals(jb2)){tableM.addRow(new Vector());}/** * 删除列 做法： 先通过getColumnCount获取表格模型列数，通过 setColumnCount设置 * setColumnCount如果新大小   小于   当前大小，则将丢弃索引 columnCount 处及其之后的所有列 */if (e.getSource().equals(jb3)){int col = tableM.getColumnCount()-1;tableM.setColumnCount(col);}if (e.getSource().equals(jb4)){int row = tableM.getRowCount()-1;if(row < 0){return ;}tableM.removeRow(row);}}}
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