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import java.awt.event.WindowAdapter ;
import java.awt.event.WindowEvent ;
import javax.swing.JTable ;
import javax.swing.JScrollPane ;
import javax.swing.JFrame ;
public class JTableDemo01{
    public static void main(String args[]){
        JFrame frame = new JFrame("Welcome To MLDN") ;
        String[] titles = {"姓名","年龄","性别","数学成绩","英语成绩","总分","是否及格"} ;
        Object [][] userInfo = {
            {"李兴华",30,"男",89,97,186,true} ,
            {"李康",23,"女",90,93,183,false}
        } ; // 定义数据
        JTable table = new JTable(userInfo,titles) ;    // 建立表格
        JScrollPane scr = new JScrollPane(table) ;
        frame.add(scr) ;
        frame.setSize(370,90) ;
        frame.setVisible(true) ;
        frame.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                System.exit(1) ;
            }
        })
    }
}

　　

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import java.awt.BorderLayout ;
import java.awt.event.WindowAdapter ;
import java.awt.event.WindowEvent ;
import javax.swing.JTable ;
import javax.swing.JScrollPane ;
import javax.swing.JFrame ;
import javax.swing.JPanel ;
import javax.swing.DefaultCellEditor ;
import javax.swing.JComboBox ;
import javax.swing.table.AbstractTableModel ;
 
class DefaultTable extends AbstractTableModel{
    private String[] titles = {"姓名","年龄","性别","数学成绩","英语成绩","总分","是否及格"} ;
    private Object [][] userInfo = {
            {"李兴华",30,"男",89,97,186,true} ,
            {"李康",23,"女",90,93,183,false}
        } ; // 定义数据
    public int getColumnCount(){    // 取得列的数量
        return this.titles.length ;
    }
    public int getRowCount(){       // 取得行的数量
        return this.userInfo.length ;
    }
    public Object getValueAt(int rowIndex, int columnIndex){
        return this.userInfo[rowIndex][columnIndex] ;
    }
    public String getColumnName(int columnIndex){
        return this.titles[columnIndex] ;
    }
    public Class<?> getColumnClass(int columnIndex) { // 得到指定列的类型
        return this.getValueAt(0,columnIndex).getClass() ;
    }
    public boolean isCellEditable(int rowIndex, int columnIndex){   // 所有内容都可以编辑
        return true ;
    }
    public void setValueAt(Object aValue, int rowIndex, int columnIndex){
        this.userInfo[rowIndex][columnIndex] = aValue ;
    }
}
 
class TableColumnModelDemo{
    private JFrame frame = new JFrame("Welcome To MLDN") ;
    private JTable table = null ;
    private DefaultTable defaultTable = new DefaultTable() ;    // TableModel
    private JComboBox sexList = new JComboBox() ;
    public TableColumnModelDemo(){
        this.table = new JTable(this.defaultTable) ;
        this.sexList.addItem("男") ;
        this.sexList.addItem("女") ;
        // 以下拉列表框的形式显示
        this.table.getColumnModel().getColumn(2).setCellEditor(new DefaultCellEditor(this.sexList)) ;
        JScrollPane scr = new JScrollPane(this.table) ;
        JPanel toolBar = new JPanel() ;
        frame.add(toolBar,BorderLayout.NORTH) ; // 加入组件
        frame.add(scr,BorderLayout.CENTER) ;    // 加入组件
        frame.setSize(370,90) ;
        frame.setVisible(true) ;
        frame.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                System.exit(1) ;
            }
        }) ;
    }
}
 
public class JTableDemo02{
    public static void main(String args[]){
        new TableColumnModelDemo() ;       
    }
}

　　

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import java.awt.BorderLayout ;
import java.awt.event.WindowAdapter ;
import java.awt.event.ActionListener ;
import java.awt.event.WindowEvent ;
import java.awt.event.ActionEvent ;
import javax.swing.JTable ;
import javax.swing.JButton ;
import javax.swing.JScrollPane ;
import javax.swing.JFrame ;
import javax.swing.JPanel ;
import javax.swing.DefaultCellEditor ;
import javax.swing.JComboBox ;
import javax.swing.table.DefaultTableModel ;
import javax.swing.table.TableColumnModel ;
import javax.swing.table.TableColumn ;
 
class ChangeTable implements ActionListener{    // 通过按钮实现动态表格
    private JFrame frame = new JFrame("Welcome To MLDN") ;
    private JTable table = null ;
    private DefaultTableModel tableModel ;  // TableModel
    private String[] titles = {"姓名","年龄","性别","数学成绩","英语成绩","总分","是否及格"} ;
    private Object [][] userInfo = {
            {"李兴华",30,"男",89,97,186,true} ,
            {"李康",23,"女",90,93,183,false}
        } ; // 定义数据
    private JButton addRowBtn = new JButton("增加行") ;     // 定义按钮
    private JButton removeRowBtn = new JButton("删除行") ;  // 定义按钮
    private JButton addColBtn = new JButton("增加列") ;     // 定义按钮
    private JButton removeColBtn = new JButton("删除列") ;  // 定义按钮
    public ChangeTable(){
        this.tableModel = new DefaultTableModel(this.userInfo,this.titles) ;
        this.table = new JTable(this.tableModel) ;
        JScrollPane scr = new JScrollPane(this.table) ;
        JPanel toolBar = new JPanel() ;
        toolBar.add(this.addRowBtn) ;
        toolBar.add(this.removeRowBtn) ;
        toolBar.add(this.addColBtn) ;
        toolBar.add(this.removeColBtn) ;
        frame.add(toolBar,BorderLayout.NORTH) ; // 加入组件
        frame.add(scr,BorderLayout.CENTER) ;    // 加入组件
        frame.setSize(370,160) ;
        frame.setVisible(true) ;
        frame.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                System.exit(1) ;
            }
        }) ;
        this.addRowBtn.addActionListener(this) ;
        this.removeRowBtn.addActionListener(this) ;
        this.addColBtn.addActionListener(this) ;
        this.removeColBtn.addActionListener(this) ;
 
 
    }
    public void actionPerformed(ActionEvent e){
        if(e.getSource() == this.addColBtn){    // 增加列
            this.tableModel.addColumn("新增列") ;
        }
        if(e.getSource() == this.addRowBtn){
            this.tableModel.addRow(new Object[]{}) ;
        }
        if(e.getSource()==this.removeColBtn){
            int colCount = this.tableModel.getColumnCount() - 1 ;// 取得列的数量
            if(colCount>=0){
                // 如果要想删除，则必须找到TableColumnModel
                TableColumnModel columMode = this.table.getColumnModel()  ;
                TableColumn taleColumn = columMode.getColumn(colCount) ;
                columMode.removeColumn(taleColumn) ;    // 删除指定的列
                this.tableModel.setColumnCount(colCount) ;
            }
        }
        if(e.getSource()==this.removeRowBtn){
            int rowCount = this.tableModel.getRowCount() - 1 ;
            if(rowCount>=0){ // 判断是否还有行可以删除
                this.tableModel.removeRow(rowCount) ;
                this.tableModel.setRowCount(rowCount) ; // 设置新的行数
            }
        }
    }
}
 
public class JTableDemo03{
    public static void main(String args[]){
        new ChangeTable() ;    
    }
}