jtreetest.java

来自「这是java 2应用开发指南这本书上所有例子的源代码」· Java 代码 · 共 22 行

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import javax.swing.tree.*;
public class JtreeTest extends Applet {
  public void init() {
    this.setBackground(Color.lightGray);
    this.setLayout(new BorderLayout());
    DefaultMutableTreeNode root=new DefaultMutableTreeNode("root");
    DefaultMutableTreeNode child=new DefaultMutableTreeNode("chile tree");
    root.add(child);
    child.add(new DefaultMutableTreeNode("leaf1"));
    child.add(new DefaultMutableTreeNode("leaf2"));
    child.add(new DefaultMutableTreeNode("leaf3"));
    JTree tree=new JTree(root,true);
    JScrollPane pane=new JScrollPane();
    pane.getViewport().add(tree);
    this.add(pane,BorderLayout.CENTER);
  }
}