Java如何删除JTree默认图标？
您可以JTree通过修改树单元格渲染器对象来删除默认图标。要获取单元格渲染器，请调用JTree.getCellRenderer()，它将返回一个DefaultTreeCellRenderer对象。然后，你可以通过设置删除图标null价值的setLeafIcon()，setClosedIcon()和setOpenIcon()。
package org.nhooo.example.swing;
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import java.awt.*;
public class JTreeRemoveIcon extends JFrame {
public JTreeRemoveIcon() throws HeadlessException {
initializeUI();
}
private void initializeUI() {
setSize(200, 400);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Address Book");
DefaultMutableTreeNode a = new DefaultMutableTreeNode("A");
DefaultMutableTreeNode b = new DefaultMutableTreeNode("B");
DefaultMutableTreeNode c = new DefaultMutableTreeNode("C");
DefaultMutableTreeNode aContact = new DefaultMutableTreeNode("Alice");
DefaultMutableTreeNode bContact = new DefaultMutableTreeNode("Bob");
DefaultMutableTreeNode cContact = new DefaultMutableTreeNode("Carol");
root.add(a);
root.add(b);
root.add(c);
a.add(aContact);
b.add(bContact);
c.add(cContact);
JTree tree = new JTree(root);
//删除默认的JTree图标
DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree.getCellRenderer();
renderer.setLeafIcon(null);
renderer.setClosedIcon(null);
renderer.setOpenIcon(null);
JScrollPane pane = new JScrollPane(tree);
pane.setPreferredSize(new Dimension(200, 400));
getContentPane().add(tree);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new JTreeRemoveIcon().setVisible(true);
}
});
}
}