各位高手：我是个初学者，不要见笑啊！我的程序如下，编译没问题，但是运行时，表格不能显示。谁能帮我解决啊！！！先谢谢了！！！
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.AbstractTableModel;
public class JdbcTest {
JFrame frm=null;
JScrollPane jsp=null;
JTable tb=null;
JComboBox cmb=null;
JdbcTest() {//构造函数
// TODO Auto-generated constructor stub
frm=new JFrame( "JDBC Test ");
Container cp=frm.getContentPane();
MyTable tbm=new MyTable();
tb=new JTable(tbm);
cmb=new JComboBox();
cmb.addItem( "man ");
cmb.addItem( "woman ");
tb.getColumnModel().getColumn(2).setCellEditor(new DefaultCellEditor(cmb));
tb.setPreferredScrollableViewportSize(new Dimension(300,200));
jsp=new JScrollPane(tb);
frm.setBounds(100,100,500,400);
cp.add(jsp);
frm.setVisible(true);
frm.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
}//构造函数
public static void main(String[] args) {
// TODO Auto-generated method stub
new JdbcTest();
}
class MyTable extends AbstractTableModel//定义表格
{
String[] head={ "MNo ", "MName ", "Sex ", "Age ", "Class "};
Object[][] datacol={
{1, "jake ",cmb,22, "0633032 "},
{2, "lucy ",cmb,21, "0633031 "}
};
public int getColumnCount()
{
return head.length;
}
public int getRowCount()
{
return datacol.length;
}
public Object getValueAt(int row,int col)
{
return datacol[row][col];
}
public Class getColumnClass(int col)
{
return getValueAt(0,col).getClass();
}
public String getColumnName(int col)
{
return head[col];
}
public boolean isCellEditable(int row,int col)
{
return true;
}
public void setValueAt(Object value,int row,int col)
{
datacol[row][col]=value;
fireTableCellUpdated(row,col);
}
}//定一表格
}
------解决方案--------------------
有異常你沒看見麼？
getColumnClass()方法更改如下：
public Class getColumnClass(int col)
{
if(getValueAt(0,col) != null)
return getValueAt(0,col).getClass();
else
return Object.class;
}
------解决方案--------------------
你把cmb当成值赋了，cmd只是编辑器，它的值 "man "和 "woman“才是它的值.
结帖吧