DefaultMutableTreeNode root = new DefaultMutableTreeNode("功能节点"); DefaultMutableTreeNode folder = new DefaultMutableTreeNode("网页"); DefaultMutableTreeNode htmlA = new DefaultMutableTreeNode("A.html"); DefaultMutableTreeNode htmlB = new DefaultMutableTreeNode("B.html"); DefaultMutableTreeNode htmlC = new DefaultMutableTreeNode("C.html");
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JSplitPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;public class CSDN extends JFrame{
JLabel labelA;
JLabel labelB;
JLabel labelC;
JSplitPane split;
public CSDN(){
super();
labelA = new JLabel("A.html");
labelA.setOpaque(true);
labelA.setBackground(Color.WHITE);
labelB = new JLabel("B.html");
labelB.setOpaque(true);
labelB.setBackground(Color.WHITE);
labelC = new JLabel("C.html");
labelC.setOpaque(true);
labelC.setBackground(Color.WHITE);
split = new JSplitPane();
split.setLeftComponent(getTree());
split.setRightComponent(labelA);
split.setDividerSize(5);
getContentPane().add(split);
setSize(600, 600);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
JTree tree;
private JTree getTree(){
DefaultMutableTreeNode root = new DefaultMutableTreeNode("功能节点");
DefaultMutableTreeNode folder = new DefaultMutableTreeNode("网页");
DefaultMutableTreeNode htmlA = new DefaultMutableTreeNode("A.html");
DefaultMutableTreeNode htmlB = new DefaultMutableTreeNode("B.html");
DefaultMutableTreeNode htmlC = new DefaultMutableTreeNode("C.html");
folder.add(htmlA);
folder.add(htmlB);
folder.add(htmlC);
root.add(folder);
tree = new JTree(root);
tree.addMouseListener(new MouseAdapter(){
public void mousePressed(MouseEvent e) {
int selRow = tree.getRowForLocation(e.getX(), e.getY());
if(selRow != -1){
TreePath selPath = tree.getPathForLocation(e.getX(), e.getY());
String htmlStr = selPath.getLastPathComponent().toString();
if(htmlStr.equals("A.html")){
split.setRightComponent(labelA);
}
if(htmlStr.equals("B.html")){
split.setRightComponent(labelB);
}
if(htmlStr.equals("C.html")){
split.setRightComponent(labelC);
}
}
}
});
tree.setPreferredSize(new Dimension(200,100));
return tree;
}
public static void main(String[] args){
CSDN c = new CSDN();
}
}