请问如何为树（JTree）的节点设置图标？

[RichardKong]

请问如何为树（JTree）的节点设置图标？

[taolei]

我也想知道，帮你up

[RichardKong]

呵呵
我现在是要用到了，我是实在没有办法了，我把JAVA DOC都看个差不多了，居然没有看到。
设置窗口图标的方法都找了N天才找到，唉，自学有时候会感到绝望。

[RichardKong]

UP UP UP

[taolei]

看在100分的面子上，我帮你问了我同事。

class DefaultTreeCellRenderer的setXXXIcon可以满足你的要求。


DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
tree.setCellRenderer(renderer);

[RichardKong]

哦 ，谢谢

[zaobao_0]

RemoteHostTree.setCellRenderer(new MyRenderer());



private class MyRenderer extends DefaultTreeCellRenderer {

ImageIcon defaultIcon = (ImageIcon)arrayListIcon.get("default");


public MyRenderer() {
}

public Component getTreeCellRendererComponent(
JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus) {

super.getTreeCellRendererComponent(
tree, value, sel,
expanded, leaf, row,
hasFocus);
// get File icon
DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
String strNode = node.toString();
File file = new File( strNode );
if ( leaf ) {
setIcon(defaultIcon);
}
return this;
}
}

[zaobao_0]

有什么问题可以和我联系。

[e-mail]

[YuLimin]

最简单的：

import java.awt.Font;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JApplet;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;

public class Test extends JApplet
{
Icon openFolder,closedFolder,leafIcon;

public void init()
{
openFolder = new ImageIcon("button_lit.jpg");
closedFolder = new ImageIcon("button.jpg");
leafIcon = new ImageIcon("leaf.gif");

JTree tree = new JTree();
JScrollPane scrollPane = new JScrollPane(tree);
DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();

renderer.setClosedIcon(closedFolder);
renderer.setOpenIcon(openFolder);
renderer.setLeafIcon(leafIcon);
renderer.setFont(new Font("Serif",Font.ITALIC,12));

tree.setCellRenderer(renderer);
tree.setEditable(true);
getContentPane().add(scrollPane);
}
}