关于JTree的问题

Question

JBuilder9提供的例子里面，有一个是专门讲JTree的。

Answer 1

给你个simpleTree
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;public class TestSimpleTree
{
public static void main(String[] args)
{
JFrame frame = new SimpleTreeFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.show();
}
}class SimpleTreeFrame extends JFrame
{
public SimpleTreeFrame()
{
setSize(300,200); DefaultMutableTreeNode root = new DefaultMutableTreeNode("world");
DefaultMutableTreeNode country = add(root,"USA");
DefaultMutableTreeNode state = add(country,"Califania");
DefaultMutableTreeNode city = add(state,"Cupertino"); city = add(state,"AnnArbor"); state.setAllowsChildren(false);//hidden city--"AnnArbor" country = add(root,"china");
state =  add(country,"liaoning");
city =  add(state,"shenyang");
JTree tree = new JTree(root);
getContentPane().add(new JScrollPane(tree));tree.addTreeSelectionListener(new TreeSelectionListener(){ public void valueChanged(TreeSelectionEvent e){ System.out.println(e.getPath());
}
}); //tree.putClientProperty("JTree.lineStyle","None");
//tree.putClientProperty("JTree.lineStyle","Angled");
//tree.setShowsRootHandles(true);
//tree.setRootVisible(false);
//tree.setEditable(true);
}
private DefaultMutableTreeNode add(DefaultMutableTreeNode parent,String childname)
{
DefaultMutableTreeNode dmt = new DefaultMutableTreeNode(childname);
parent.add(dmt);
return dmt;
}
}

Answer 2

JBuilder9的Sample文件夹里就有，如果你没有Jbuilder，那你把邮箱告诉我，我发一个给你