JTree中怎么改变节点的字体颜色？

来源：互联网发布：bong3软件下载编辑：程序博客网时间：2024/05/08 12:17
package testTree;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.event.*;import javax.swing.tree.*;public class SimpleTree extends JFrame{     JPanel contentPane;        JScrollPane scrollPane = new JScrollPane();        MyTree tree = new MyTree();        DefaultTreeModel treeModel = (DefaultTreeModel)tree.getModel();        NodeRenderer renderer = new NodeRenderer();        NodeRenderer2 renderer2 = new NodeRenderer2();        private TreeMouseHandler treeMouseListener = new TreeMouseHandler();        //Constructor        public SimpleTree()        {            enableEvents(AWTEvent.WINDOW_EVENT_MASK);            try            {                jbInit();            }            catch(Exception e)            {                e.printStackTrace();            }        }        //Component initialization        private void jbInit() throws Exception        {            tree.setEditable(false);            tree.setShowsRootHandles(true);            tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);            tree.setExpandsSelectedPaths(true);            tree.addMouseListener(treeMouseListener);            tree.setCellRenderer(renderer);            tree.addTreeExpansionListener(new TreeExpansionListener()            {                public void treeCollapsed(TreeExpansionEvent evt)                {                }                public void treeExpanded(TreeExpansionEvent evt)                {                }            });            contentPane = (JPanel) this.getContentPane();            this.setTitle("MyFrame");            scrollPane.getViewport().add(tree, null);            contentPane.add(scrollPane, BorderLayout.CENTER);        }        //Overridden so we can exit when window is closed        protected void processWindowEvent(WindowEvent e)        {            super.processWindowEvent(e);            if (e.getID() == WindowEvent.WINDOW_CLOSING)            {                System.exit(0);            }        }        public static void main(String[] args)        {            SimpleTree simpleTree = new SimpleTree();            simpleTree.setSize(800,600);            simpleTree.show();        }        private class TreeMouseHandler extends MouseAdapter        {            public void mousePressed(MouseEvent e)            {                if(SwingUtilities.isLeftMouseButton(e) == false)                {                    return;                }                System.out.println("mousePressed");                tree.setCellRenderer(renderer2);            }            public void mouseClicked(MouseEvent e)            {                if((SwingUtilities.isLeftMouseButton(e) == false))                {                    return;                }                TreePath[] selectedPaths = tree.getSelectionPaths();                if((selectedPaths == null) || (selectedPaths.length == 0))                {                    return;                }                if(selectedPaths.length == 1)                {                    if(e.getClickCount() == 1)                    {                        System.out.println("mouseClicked: left button * 1 : " + selectedPaths[0]);                    }                    else if(e.getClickCount() == 2)                    {                        System.out.println("mouseClicked: left button * 2 : " + selectedPaths[0]);                    }                }            }        }        class MyTree extends JTree        {            public MyTree()            {                DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("root");                DefaultMutableTreeNode sub1Node =                 new DefaultMutableTreeNode("sub1");                rootNode.add(sub1Node);                DefaultMutableTreeNode n =                new DefaultMutableTreeNode("011");                sub1Node.add(n);                n.add(new DefaultMutableTreeNode("111"));                n.add(new DefaultMutableTreeNode("112"));                n.add(new DefaultMutableTreeNode("113"));                n = new DefaultMutableTreeNode("012");                sub1Node.add(n);                n.add(new DefaultMutableTreeNode("121"));                n.add(new DefaultMutableTreeNode("122"));                n.add(new DefaultMutableTreeNode("123"));                this.setModel(new DefaultTreeModel(rootNode));            }        }        class NodeRenderer extends DefaultTreeCellRenderer        {            public Component getTreeCellRendererComponent(JTree tree, Object value,                                                          boolean selected, boolean expanded,                                                          boolean leaf, int row, boolean hasFocus)            {                DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;                super.getTreeCellRendererComponent(tree, value,                                                   selected, expanded,                                                   leaf, row, hasFocus);                if(node.getUserObject().toString().trim().equals("sub1"))                {                                       setForeground(Color.RED);                }                return this;            }        }        class NodeRenderer2 extends DefaultTreeCellRenderer        {            public Component getTreeCellRendererComponent(JTree tree, Object value,                                                          boolean selected, boolean expanded,                                                          boolean leaf, int row, boolean hasFocus)            {                DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;                super.getTreeCellRendererComponent(tree, value,                                                   selected, expanded,                                                   leaf, row, hasFocus);                if(node.getUserObject().toString().trim().equals("sub1"))                {                                       setForeground(Color.RED);                }                if(node.getUserObject().toString().trim().equals("111"))                {                                       setForeground(Color.BLUE);                }                return this;            }        }}
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