tree4.java~25~

该文件中包含有源代码及一部分的文档,该系统是一个小型的英语单词字典的系统.

package english;

import java.awt.*;
import javax.swing.tree.*;
import javax.swing.*;
import java.awt.Dimension;
import java.awt.BorderLayout;
import javax.swing.event.AncestorEvent;
import javax.swing.event.AncestorListener;
import java.awt.event.ActionEvent;
import java.sql.ResultSet;
import java.sql.SQLException;
import english.Database;

public class Tree4 extends JPanel {

    DefaultMutableTreeNode root, node1, node2, child;
    DefaultTreeModel model;
    BorderLayout borderLayout1 = new BorderLayout();
    JScrollPane jScrollPane1 = new JScrollPane();
    JTree jTree1 = new JTree();

    public Tree4() {
        try {
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    private void jbInit() throws Exception {
        root = new DefaultMutableTreeNode("歌曲曲目");
        node1 = new DefaultMutableTreeNode("girl");
        node2 = new DefaultMutableTreeNode("boy");
        model = new DefaultTreeModel(root);
        model.insertNodeInto(node1, root, root.getChildCount());
        model.insertNodeInto(node2, root, root.getChildCount());
        child = new DefaultMutableTreeNode("WANNABE");
        model.insertNodeInto(child, node1, node1.getChildCount());
        child = new DefaultMutableTreeNode("right here warting");
        model.insertNodeInto(child, node2, node2.getChildCount());
        jTree1 = new JTree(model);
        JScrollPane jScrollPane1 = new JScrollPane(jTree1,
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        this.add(jScrollPane1, java.awt.BorderLayout.CENTER);
        this.setLayout(borderLayout1);
        this.setPreferredSize(new Dimension(100, 290));
        this.add(jScrollPane1, java.awt.BorderLayout.CENTER);
        jScrollPane1.getViewport().add(jTree1);
    }

    public DefaultTreeModel gettreemodel(){
      root = new DefaultMutableTreeNode("选择开头单词");
      model = new DefaultTreeModel(root);
      try {
      Database db = new Database();
      ResultSet rs = db.query("select * from head_to_tail_word order by name");
          while (rs.next()) {
                child = new DefaultMutableTreeNode(rs.getString(1));
                model.insertNodeInto(child, root, root.getChildCount());
          }
      } catch (SQLException ex) {
          ex.printStackTrace();
      }
      return model;
  }
}