TableCellRenderer就是用来绘制展示当前cell单元数值内容的,你可以用文字、数值或者图片来表示内容,当然最强大展示方式的就是通过自定义自己的renderer组件,通过Java2D来绘制各种天花乱坠的效果。
TableCellEditor主要是用来当用户点击在具体cell时进行编辑的组件,所以TableCellEditor除了具有TableCellRenderer一样的绘制功能外还可以进行交互动作,例如在cell上出现下拉框、勾选框甚至通过按钮弹出更复杂的对话框让用户进行输入编辑。
他们都是JPanel的子类
public Component getTableCellEditorComponent(JTable arg0, Object arg1,
boolean arg2, int arg3, int arg4)
{
// TODO Auto-generated method stub
return null;
}
是TableCellEditor主要方法 this
如果添加JButton 都是在这个基础的JComponent上面添加的组件
TableCellRenderer也是类似
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
//主类
//@SuppressWarnings("unchecked")
public class TryJTable extends JFrame
{
private static final long serialVersionUID = 1L;
//创建自定义表格模型对象
MyTableModel dtm=new MyTableModel();
//创建JTable对象
JTable jt=new JTable(dtm);
//将JTable封装进滚动窗格
JScrollPane jsp=new JScrollPane(jt);
//自定义的表格模型
private class MyTableModel extends AbstractTableModel
{
private static final long serialVersionUID = 1L;
//创建表示各个列类型的类型数组
Class[] typeArray=
{Object.class,Double.class,Boolean.class,Icon.class,Color.class};
//创建列标题字符串数组
String[] head={"Object","Number","Boolean","Icon","Color"};
//创建初始表格数据
Object[][] data={{"这里是字符串1",new Integer(20),new Boolean(true),
new ImageIcon("D:/p1.gif "),Color.black},
{"这里是字符串2",new Double(12.34),new Boolean(false),
new ImageIcon("D:/p2.gif "),Color.darkGray},
{"这里是字符串3",new Integer(125),new Boolean(true),
new ImageIcon("D:/p3.gif"),Color.white}};
//重写getColumnCount方法
public int getColumnCount()
{
return head.length;
}
//重写getRowCount方法
public int getRowCount()
{
return data.length;
}
//重写getColumnName方法
public String getColumnName(int col)
{
return head[col];
}
//重写getValueAt方法
public Object getValueAt(int r,int c)
{
return data[r][c];
}
//重写getColumnClass方法
public Class getColumnClass(int c)
{
return typeArray[c];
}
//重写isCellEditable方法
public boolean isCellEditable(int r,int c)
{
return true;
}
//重写setValueAt方法
public void setValueAt(Object value,int r,int c)
{
data[r][c]=value;
//
this.fireTableCellUpdated(r,c);
}
}
//自定义的绘制器
private class MyCellRendererForColorClass
extends JLabel implements TableCellRenderer
{
private static final long serialVersionUID = 1L;
//定义构造器
public MyCellRendererForColorClass ()
{
//设置标签为不透明状态
this.setOpaque(true);
//设置标签的文本对齐方式为居中
this.setHorizontalAlignment(JLabel.CENTER);
}
//实现获取呈现控件的getTableCellRendererComponent方法
public Component getTableCellRendererComponent(JTable table,Object value,
boolean isSelected,boolean hasFocus,int row,int column)
{
//获取要呈现的颜色
Color c=(Color)value;
//根据参数value设置背景色
this.setBackground(c);
//设置前景色为背景色反色
this.setForeground(new Color(255-c.getRed()
,255-c.getGreen(),255-c.getBlue()));
//设置标签中显示RGB的值
this.setText("["+c.getRed()+","+c.getGreen()+","+c.getBlue()+"]");
//将自己返回
return this;
}
}
//声明Color类型的自定义编辑器
class MyEditorForColorClass extends AbstractCellEditor
implements TableCellEditor,ActionListener
{
private static final long serialVersionUID = 1L;
//定义Color变量
Color c;
//定义对话框变量
JDialog jd;
//创建一个按扭
JButton jb=new JButton();
//创建JColorChooser对象
JColorChooser jcc=new JColorChooser();
//声明一个常量
public static final String EDIT="edit";
//定义构造器
public MyEditorForColorClass()
{
//为按扭注册监听器
jb.addActionListener(this);
//设置此按扭的动作命令
jb.setActionCommand(EDIT);
//获取颜色选择器
jd=JColorChooser.createDialog(jb,"选择颜色",true,jcc,this,null);
}
//实现actionPerformed方法
public void actionPerformed(ActionEvent e)
{
//测试获得的动作命令是否等于EDIT常量
if(e.getActionCommand().equals(EDIT))
{
//设置按扭的背景颜色
jb.setBackground(c);
//设置前景色为背景色反色
jb.setForeground(new Color(255-c.getRed()
,255-c.getGreen(),255-c.getBlue()));
//设置按钮中显示RGB的值
jb.setText("["+c.getRed()+","+c.getGreen()+","+c.getBlue()+"]");
//设置颜色选择器的颜色
jcc.setColor(c);
//设置颜色选择器可见
jd.setVisible(true);
//通知所有监听器,以延迟方式创建事件对象
this.fireEditingStopped();
}
else
{
//获取颜色
c=jcc.getColor();
}
}
//定义getCellEditorValue方法返回颜色值
public Object getCellEditorValue()
{
return c;
}
//重写getTableCellEditorComponent方法
public Component getTableCellEditorComponent(JTable table,
Object value,boolean isSelected,int row,int column)
{
c=(Color)value;
return jb;
}
}
//声明Icon类型的自定义编辑器
class MyEditorForIconClass extends AbstractCellEditor
implements TableCellEditor,ActionListener
{
private static final long serialVersionUID = 1L;
//定义Icon变量
Icon icon;
//创建一个按扭
JButton jb=new JButton();
//创建JColorChooser对象
JFileChooser jfc=new JFileChooser();
//声明一个常量
public static final String EDIT="edit";
//定义构造器
public MyEditorForIconClass()
{
//为按扭注册监听器
jb.addActionListener(this);
//设置此按扭的动作命令
jb.setActionCommand(EDIT);
}
//实现actionPerformed方法
public void actionPerformed(ActionEvent e)
{
//测试获得的动作命令是否等于EDIT常量
if(e.getActionCommand().equals(EDIT))
{
//设置按扭的图标
jb.setIcon(icon);
//显示文件选择器对话框
jfc.showOpenDialog(jb);
//获取新图片
if(jfc.getSelectedFile()!=null)
{
icon=new ImageIcon(jfc.getSelectedFile().getAbsolutePath());
}
//通知所有监听器,以延迟方式创建事件对象
this.fireEditingStopped();
}
}
//定义getCellEditorValue方法返回图标
public Object getCellEditorValue()
{
return icon;
}
//重写getTableCellEditorComponent方法
public Component getTableCellEditorComponent(JTable table,
Object value,boolean isSelected,int row,int column)
{
icon=(Icon)value;
return jb;
}
}
本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/wzh32/archive/2009/05/01/4141543.aspx
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import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class RoundColorTable extends JFrame
{
private String[] colname = {"第1列","第2列","第3列","第4列","第5列"}; //表头信息
private String[][] data = new String[10][5]; //表内容
private JTable table;
public RoundColorTable() {
//表内容赋值
for(int i = 0; i < 10; i++) {
for(int j = 0; j < 5; j++) {
data[i][j] = "( " + (j+1) + ", " + (i+1) + " )";
}
}
table = new JTable(new DefaultTableModel(data,colname));
TableCellRenderer tcr = new ColorTableCellRenderer();
table.setDefaultRenderer(Object.class,tcr);//为JTable增加渲染器,因为是针对于表格中的所有单元格,所有用Object.class
add(new JScrollPane(table),BorderLayout.CENTER);
setVisible(true);
setSize(500,300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String args[]) {
new RoundColorTable();
}
}
class ColorTableCellRenderer extends DefaultTableCellRenderer
{
DefaultTableCellRenderer renderer=new DefaultTableCellRenderer();
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if(row%2 == 0){
//调用基类方法
return super.getTableCellRendererComponent(table, value, isSelected,hasFocus, row, column);
}
else{
return renderer.getTableCellRendererComponent(table, value, isSelected,hasFocus, row, column);
}
}
//该类继承与JLabel,Graphics用于绘制单元格,绘制红线
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2=(Graphics2D)g;
final BasicStroke stroke=new BasicStroke(2.0f);
g2.setColor(Color.RED);
g2.setStroke(stroke);
g2.drawLine(0,getHeight()/2,getWidth(),getHeight()/2);
}
}
本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/chosen0ne/archive/2009/08/16/4453267.aspx