jtree2.java

JAVA GUI 之SWING组建试用 SWING

import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.event.*;
import javax.swing.event.*;

public class JTree2 extends JFrame
{
  JPanel cp=new JPanel();
  JTree jtree;
  DefaultMutableTreeNode root;

  public JTree2()
  {
   this.setSize(300,300);
   this.setTitle("try to use tree");
   cp=(JPanel)this.getContentPane();
   cp.setLayout(new BorderLayout());

   root=new DefaultMutableTreeNode("school");
   createTree(root);
   jtree=new JTree(root);
   cp.add(jtree,BorderLayout.CENTER);
  }

  public static void main(String[] args)
  {
    JTree2 JTree2 = new JTree2();
    JTree2.setVisible(true);
  }

  private void createTree(DefaultMutableTreeNode root)
  {
   DefaultMutableTreeNode classroom=null;
   DefaultMutableTreeNode number=null;

   classroom=new DefaultMutableTreeNode("classroom");
   root.add(classroom);

   for(int i=1;i<=8;i++)
   {
    number=new DefaultMutableTreeNode("No."+String.valueOf(i));

    if(i==4)
    {
     for(int j=1;j<=5;j++)
     {
      number.add(new DefaultMutableTreeNode("seat"+String.valueOf(j)));
     }
    }
   classroom.add(number);
   }
  }

  protected void processWindowEvent(WindowEvent e)
  {
   if(e.getID()==WindowEvent.WINDOW_CLOSING)
   {
    System.exit(0);
   }
  }
}