jtreedemo.java

CMM编译器词法分析及语法分析代码

package try_sw;
import   java.awt.Dimension;
import  java.awt.Color;
import  javax.swing.JFrame;
import  javax.swing.JPanel;
import  javax.swing.JScrollPane;
import  javax.swing.JTree;
import  javax.swing.BoxLayout;
import  javax.swing.tree.TreePath;
import  javax.swing.tree.DefaultMutableTreeNode;
import  javax.swing.tree.DefaultTreeModel;
/*
JTree的构造函数:
JTree()
JTree(Hashtable value)
JTree(Object[] value)//只有这个构造函数可以创建多个根结点
JTree(TreeModel newModel)
JTree(TreeNode root)
JTree(TreeNode root, boolean asksAllowsChildren)
JTree(Vector value)

*/
public   class  JTreeDemo
{
  @SuppressWarnings("deprecation")
public   static   void  main (String[] args)
 {


   // 构造函数：JTree()
  JTree example1  =   new  JTree();

 

  
   // 构造函数：JTree(Object[] value)
  Object[] letters =  { " a " ,  " b " ,  " c " ,  " d " ,  " e " };
  JTree example2  =   new  JTree (letters);

 


   // 构造函数：JTree(TreeNode root)(TreeNode空)
   // 用空结点创建树
  DefaultMutableTreeNode node1  =   new  DefaultMutableTreeNode(); // 定义树结点
  JTree example3  =   new  JTree (node1); // 用此树结点做参数调用 JTree的构造函数创建含有一个根结点的树

 


   // 构造函数：JTree(TreeNode root)(同上,只是TreeNode非空)
   // 用一个根结点创建树
  DefaultMutableTreeNode node2  =   new  DefaultMutableTreeNode( " Color " );
  JTree example4  =   new  JTree (node2); // 结点不可以颜色,默认为白面黑字
  example4.setBackground (Color.lightGray);

 


   // 构造函数：JTree(TreeNode root, boolean asksAllowsChildren)(同上,只是TreeNode又有不同)
   // 使用DefaultMutableTreeNode类先用一个根结点创建树，设置为可添加孩子结点,再添加孩子结点
  DefaultMutableTreeNode color  =   new  DefaultMutableTreeNode( " Color " ,  true );
  DefaultMutableTreeNode gray  =   new  DefaultMutableTreeNode ( " Gray " );
  color.add (gray);
  color.add ( new  DefaultMutableTreeNode ( " Red " ));
  gray.add ( new  DefaultMutableTreeNode ( " Lightgray " ));
  gray.add ( new  DefaultMutableTreeNode ( " Darkgray " ));
  color.add ( new  DefaultMutableTreeNode ( " Green " ));
  JTree example5  =   new  JTree (color);
  
  
  
  
   // 构造函数：JTree(TreeNode root)(同上,只是TreeNode非空)
   // 通过逐个添加结点创建树
  DefaultMutableTreeNode biology  =   new  DefaultMutableTreeNode ( " Biology " );
  DefaultMutableTreeNode animal  =   new  DefaultMutableTreeNode ( " Animal " );
  DefaultMutableTreeNode mammal  =   new  DefaultMutableTreeNode ( " Mammal " );
  DefaultMutableTreeNode horse  =   new  DefaultMutableTreeNode ( " Horse " );
  mammal.add (horse);
  animal.add (mammal);
  biology.add (animal);
  JTree example6  =   new  JTree (biology);
  horse.isLeaf();
  horse.isRoot();
  
  


   // 构造函数:JTree(TreeModel newModel)
   // 用DefaultMutableTreeNodel类定义一个结点再用这个结点做参数定义一个用DefaultTreeMode
   // 创建一个树的模型,再用JTree的构造函数创建一个树
  
  DefaultMutableTreeNode root  =   new  DefaultMutableTreeNode ( " Root1 " );
  DefaultMutableTreeNode child1  =   new  DefaultMutableTreeNode ( " Child1 " );
  DefaultMutableTreeNode child11  =   new  DefaultMutableTreeNode ( " Child11 " );
  DefaultMutableTreeNode child111  =   new  DefaultMutableTreeNode ( " Child111 " );
  root.add (child1); child1.add (child11); child11.add (child111);
  
  
  
  DefaultTreeModel model  =   new  DefaultTreeModel (root);
  
  JTree example7  =   new  JTree (model);

 

  JPanel panel  =   new  JPanel();
  panel.setLayout ( new  BoxLayout (panel, BoxLayout.X_AXIS));
  panel.setPreferredSize ( new  Dimension ( 700 ,  400 ));
  panel.add ( new  JScrollPane (example1)); // JTree必须放在JScrollPane上
  panel.add ( new  JScrollPane (example2));
  panel.add ( new  JScrollPane (example3));
  panel.add ( new  JScrollPane (example4));
  panel.add ( new  JScrollPane (example5));
  panel.add ( new  JScrollPane (example6));
  panel.add ( new  JScrollPane (example7));
  

 

  JFrame frame  =   new  JFrame ( " JTreeDemo " );
  frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
  frame.setContentPane (panel);
  frame.pack();
  frame.show();
  
 }
}