myclienttree.java

Java实现的图书管理系统

/*
 * MyClientTree.java
 *
 * Created on 2003年5月8日, 下午4:51
 */

/**
 *
 * @author  administrator
 */
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.tree.*;


// Takes an array of Strings and makes the first
// element a node and the rest leaves:
class Branch {
  DefaultMutableTreeNode r;
  public Branch(String[] data) {
    r = new DefaultMutableTreeNode(data[0]);
    for(int i = 1; i < data.length; i++)
      r.add(new DefaultMutableTreeNode(data[i]));
  }
  public DefaultMutableTreeNode node() { 
    return r; 
  }
} 

class MyClientTree extends JTree {
    
    /** Creates a new instance of MyClientTree */
    String[][] data = {
    /*{ "Colors", "Red", "Blue", "Green" },
    { "Flavors", "Tart", "Sweet", "Bland" },
    { "Length", "Short", "Medium", "Long" },
    { "Volume", "High", "Medium", "Low" },
    { "Temperature", "High", "Medium", "Low" },
    { "Intensity", "High", "Medium", "Low" },
     */
        {"查询"},
        {"借阅"},
        {"归还"}
  };
  
    DefaultTreeModel model;
    DefaultMutableTreeNode root, child;
    
    public MyClientTree() 
    {
        // Capture the tree's model:
        model =(DefaultTreeModel)this.getModel();
        //fill the data
        root = new DefaultMutableTreeNode("图书管理系统");
       //add the root node
        model.setRoot(root);
        
        //add the leaf nodes
        int i=0;
        while(i < data.length) 
        {
          child = new Branch(data[i++]).node();
        
          model.insertNodeInto(child, root, model.getChildCount(root));
          // This puts the new node on the 
          // currently chosen node.
        }
//        setSize(100, 250);
    }
    
}