TableCellRender学习

为了让JTable的显示能根据用户自己设计的需要进行复杂的变换可以同过实现TableCellRenderer借口，并实现该接口中的

public Component getTableCellRendererComponent(JTable table,Object value,boolean isSelected, boolean hasFocus, int row,  int column)

方法，然后在构造自己的JTable时使用JTable的setDefaultRendererClass columnClass,TableCellRenderer renderer);就可以了。

下面是一个使用TableCellRenderer的小例子

package test;
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.Component;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.JScrollPane;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
public class EvenOddRowCellRenderer extends JFrame {
 DefaultTableModel tableModel = new DefaultTableModel(
  new Object[][]{{"some","text"},{"any","text"},{"even","more"},
  {"text","strings"},{"and","other"},{"text","values"}},
  new Object[]{"Column 1","Column 2"});
 public EvenOddRowCellRenderer(){
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  JTable table = new JTable(tableModel);
  table.setDefaultRenderer(Object.class,new MyRenderer());
  getContentPane().add(new JScrollPane(table),BorderLayout.CENTER);
  pack();
  setVisible(true);
 }
 public static void main(String[] args){
  new EvenOddRowCellRenderer();
 }
}
class MyRenderer implements TableCellRenderer{
 public Component getTableCellRendererComponent(JTable table,
                                        Object value,
                                        boolean isSelected,
                                        boolean hasFocus,
                                        int row,
                                        int column){
  JTextField editor = new JTextField();
  if(value!=null){
   editor.setText(value.toString());
  }
  editor.setBackground((row%2==0)?Color.white:Color.cyan);
  return editor;
 }
}