[求助] 关于swing方面的一些问题
如何改变JTree各个节点的字体及颜色？
如何使JTree用自己的图片显示而不使用系统的？
JTable如何显示图片？
就这三个，最好给个列子，谢谢！

------解决方案--------------------
Jtable显示图片的例子:

/**
@version 1.00 2001-07-21
@author Cay Horstmann
*/

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

/**
This program demonstrates cell rendering and editing
in a table.
*/
public class TableCellRenderTest
{
public static void main(String[] args)
{
JFrame frame = new TableCellRenderFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.show();
}
}

/**
This frame contains a table of planet data.
*/
class TableCellRenderFrame extends JFrame
{
public TableCellRenderFrame()
{
setTitle( "TableCellRenderTest ");
setSize(WIDTH, HEIGHT);

TableModel model = new PlanetTableModel();
JTable table = new JTable(model);

// set up renderers and editors

table.setDefaultRenderer(Color.class,
new ColorTableCellRenderer());
table.setDefaultEditor(Color.class,
new ColorTableCellEditor());

JComboBox moonCombo = new JComboBox();
for (int i = 0; i <= 20; i++)
moonCombo.addItem(new Integer(i));
TableColumnModel columnModel = table.getColumnModel();
TableColumn moonColumn
= columnModel.getColumn(PlanetTableModel.MOON_COLUMN);
moonColumn.setCellEditor(new DefaultCellEditor(moonCombo));

// show table

table.setRowHeight(100);
getContentPane().add(new JScrollPane(table),
BorderLayout.CENTER);
}

private static final int WIDTH = 600;
private static final int HEIGHT = 400;
}

/**
The planet table model specifies the values, rendering
and editing properties for the planet data.
*/
class PlanetTableModel extends AbstractTableModel
{
public String getColumnName(int c)
{
return columnNames[c];
}

public Class getColumnClass(int c)
{
return cells[0][c].getClass();
}

public int getColumnCount()
{
return cells[0].length;
}

public int getRowCount()
{
return cells.length;
}

public Object getValueAt(int r, int c)
{
return cells[r][c];
}

public void setValueAt(Object obj, int r, int c)
{
cells[r][c] = obj;
}

public boolean isCellEditable(int r, int c)
{
return c == NAME_COLUMN
|| c == MOON_COLUMN
|| c == GASEOUS_COLUMN
|| c == COLOR_COLUMN;
}

public static final int NAME_COLUMN = 0;
public static final int MOON_COLUMN = 2;
public static final int GASEOUS_COLUMN = 3;
public static final int COLOR_COLUMN = 4;

private Object[][] cells =
{
{
"Mercury ", new Double(2440), new Integer(0),
Boolean.FALSE, Color.yellow,
new ImageIcon( "Mercury.gif ")
},
{
"Venus ", new Double(6052), new Integer(0),
Boolean.FALSE, Color.yellow,
new ImageIcon( "Venus.gif ")