Java中JTable的用法

import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JPanel;
import javax.swing.JTable;
import java.awt.Color;
import java.awt.GridLayout;
import javax.swing.table.TableColumn;


public class JTableDemo
{
 public static void main (String[] args)
 {
  /*
  构造函数有很多下面先介绍几个:
  JTable()
  JTable(int numRows, int numColumns)
  JTable(Object[][] rowData, Object[] columnNames)
  */
  
  JTable example1 = new JTable ();//看不到但存在
  
  JTable example2 = new JTable (8, 6);
  
  
  final Object[] columnNames = {"姓名", "性别", "家庭地址",//列名最好用final修饰
   "电话号码", "生日", "工作", "收入", "婚姻状况","恋爱状况"};
  Object[][] rowData = {
     {"ddd", "男", "江苏南京", "1378313210", "03/24/1985", "学生", "寄生中", "未婚", "没"},
     {"eee", "女", "江苏南京", "13645181705", "xx/xx/1985", "家教", "未知", "未婚", "好象没"},
     {"fff", "男", "江苏南京", "13585331486", "12/08/1985", "汽车推销员", "不确定", "未婚", "有"},
     {"ggg", "女", "江苏南京", "81513779", "xx/xx/1986", "宾馆服务员", "确定但未知", "未婚", "有"},
     {"hhh", "男", "江苏南京", "13651545936", "xx/xx/1985", "学生", "流放中", "未婚", "无数次分手后没有"}
    };
  
  
  JTable friends = new JTable (rowData, columnNames);
  friends.setPreferredScrollableViewportSize(new Dimension(600, 100));//设置表格的大小
  friends.setRowHeight (30);//设置每行的高度为20
  friends.setRowHeight (0, 20);//设置第1行的高度为15
  friends.setRowMargin (5);//设置相邻两行单元格的距离
  friends.setRowSelectionAllowed (true);//设置可否被选择.默认为false
  friends.setSelectionBackground (Color.white);//设置所选择行的背景色
  friends.setSelectionForeground (Color.red);//设置所选择行的前景色
  friends.setGridColor (Color.black);//设置网格线的颜色
  friends.selectAll ();//选择所有行
  friends.setRowSelectionInterval (0,2);//设置初始的选择行,这里是1到3行都处于选择状态
  friends.clearSelection ();//取消选择
  friends.setDragEnabled (false);//不懂这个
  friends.setShowGrid (false);//是否显示网格线
  friends.setShowHorizontalLines (false);//是否显示水平的网格线
  friends.setShowVerticalLines (true);//是否显示垂直的网格线
  friends.setValueAt ("tt", 0, 0);//设置某个单元格的值,这个值是一个对象
  friends.doLayout ();
  friends.setBackground (Color.lightGray);
  
  
  JScrollPane pane1 = new JScrollPane (example1);//JTable最好加在JScrollPane上
  JScrollPane pane2 = new JScrollPane (example2);
  JScrollPane pane3 = new JScrollPane (friends);

  JPanel panel = new JPanel (new GridLayout (0, 1));
  panel.setPreferredSize (new Dimension (600,400));
  panel.setBackground (Color.black);
  panel.add (pane1);
  panel.add (pane2);
  panel.add (pane3);
  
  JFrame frame = new JFrame ("JTableDemo");
  frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
  
  frame.setContentPane (panel);
  
  frame.pack();
  frame.show();
  
 }
}