classtree.java~16~

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/**
 *
 * <p>Title: Class Tree </p>
 *
 * <p>Description: 通过类的层次结构图来表示节点 </p>
 *
 * <p>Copyright: Copyright (c) 2006</p>
 *
 * <p>Company : Spring </p>
 *
 * @author : Spring
 * @version 1.0
 */

import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.*;
import java.util.*;
import javax.swing.*;
import javax.swing.tree.*;

public class ClassTree{
  public static void main(String[] args){
    JFrame frame = new ClassTreeFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.show();
  }
}

class ClassTreeFrame extends JFrame{
  public ClassTreeFrame(){
    setTitle("ClassTree");
    setSize(WIDTH,HEIGHT);
    //创建根节点
    root = new DefaultMutableTreeNode(java.lang.Object.class);
    //设置默认树型方式
    model = new DefaultTreeModel(root);
    tree = new JTree(model);

    addClass(getClass());

    ClassNameTreeCellRenderer renderer
        = new ClassNameTreeCellRenderer();
    //设置图标
    renderer.setClosedIcon(new ImageIcon("red-ball.gif"));
    renderer.setOpenIcon(new ImageIcon("yellow-ball.gif"));
    renderer.setLeafIcon(new ImageIcon("blue-ball.gif"));
    tree.setCellRenderer(renderer);
    //添加滚动面板
    getContentPane().add(new JScrollPane(tree),
        BorderLayout.CENTER);
    //添加文本框
    addTextField();
  }

  /**
   *
   */
  public void addTextField(){
    JPanel panel = new JPanel();
    ActionListener addListener = new ActionListener(){
       public void actionPerformed(ActionEvent event){
         try{
           String text = textField.getText();
           addClass(Class.forName(text));
           textField.setText("");
         }
         //显示异常消息
     catch(ClassNotFoundException e){
       JOptionPane.showMessageDialog(null,
           "Class not found");
     }
  }
};
    textField = new JTextField(20);
    textField.addActionListener(addListener);
    panel.add(textField);

    JButton addButton = new JButton("Add");
    addButton.addActionListener(addListener);
    panel.add(addButton);

    getContentPane().add(panel,BorderLayout.SOUTH);

  }
  public DefaultMutableTreeNode findUserObject(Object obj){
    Enumeration e = root.breadthFirstEnumeration();
    while(e.hasMoreElements()){
       DefaultMutableTreeNode node
           =(DefaultMutableTreeNode)e.nextElement();
       if(node.getUserObject().equals(obj))
         return node;
    }
    return null;
  }

  public DefaultMutableTreeNode addClass(Class c){
    if(c.isInterface() ||c.isPrimitive())
      return null;
    DefaultMutableTreeNode node = findUserObject(c);
     if(node !=null)
       return node;
   Class s = c.getSuperclass();
   DefaultMutableTreeNode  parent;
   if(s == null)
     parent = root;
   else
     parent = addClass(s);
   DefaultMutableTreeNode newNode
       = new DefaultMutableTreeNode(c);
   model.insertNodeInto(newNode,parent,parent.getChildCount());

   TreePath path = new TreePath(model.getPathToRoot(newNode));
   tree.makeVisible(path);
   return newNode;
  }
  private DefaultMutableTreeNode root;
  private DefaultTreeModel model;
  private JTree tree;
  private JTextField textField;
  private static final int  WIDTH = 400;
  private static final int  HEIGHT = 300;
}

class ClassNameTreeCellRenderer extends DefaultTreeCellRenderer{

    public Component getTreeCellRendererComponent(JTree tree,
        Object value,boolean selected,boolean expanded,
      boolean leaf,int row,boolean hasFocus){
          super.getTreeCellRendererComponent(tree,value,
              selected,expanded,leaf,row,hasFocus);
  DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
  Class c = (Class)node.getUserObject();
  if(plainFont == null){
     plainFont = getFont();
     if(plainFont !=null)
       italicFont = plainFont.deriveFont(Font.ITALIC);
    }
    if((c.getModifiers() & Modifier.ABSTRACT) == 0)
      setFont(plainFont);
   else
     setFont(italicFont);
   return this;

}
 private Font plainFont = null;
 private Font italicFont = null;
}