Java如何更改JTree中选定节点的颜色？
本示例说明如何更改JTree组件的所选节点的颜色。它显示了如何设置节点背景色，字体颜色和选定的节点边框颜色。
为此，您需要DefaultTreeCellRenderer从JTree实例获取对象并修改节点的选择颜色。
package org.nhooo.example.swing;
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import java.awt.*;
public class JTreeTextSelectionColorDemo extends JFrame {
public JTreeTextSelectionColorDemo() throws HeadlessException {
initializeUI();
}
private void initializeUI() {
setSize(150, 300);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Department");
DefaultMutableTreeNode book = new DefaultMutableTreeNode("Books");
DefaultMutableTreeNode fiction = new DefaultMutableTreeNode("Fictions");
DefaultMutableTreeNode science = new DefaultMutableTreeNode("Sciences");
DefaultMutableTreeNode text = new DefaultMutableTreeNode("Text Books");
DefaultMutableTreeNode children = new DefaultMutableTreeNode("Children");
root.add(book);
book.add(fiction);
book.add(science);
book.add(text);
book.add(children);
JTree tree = new JTree(root);
//获取JTree的DefaultTreeCellRenderer实例
//零件。然后我们自定义选择的颜色
//节点使用蓝色背景，白色字体颜色和黑色
//边境。
DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree.getCellRenderer();
renderer.setTextSelectionColor(Color.white);
renderer.setBackgroundSelectionColor(Color.blue);
renderer.setBorderSelectionColor(Color.black);
JScrollPane pane = new JScrollPane(tree);
pane.setPreferredSize(new Dimension(150, 300));
getContentPane().add(pane);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new JTreeTextSelectionColorDemo().setVisible(true);
}
});
}
}
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