trees.java~28~

Contains a complete archiver by Haruhiko Okumura. The archiver uses an LZ engine whose output is c

package swingexample;

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

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;
}
}
public class Trees extends JPanel {
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" },
};
static int i = 0;
DefaultMutableTreeNode root, child, chosen;
JTree tree;
DefaultTreeModel model;
public Trees() {
setLayout(new BorderLayout());
root = new DefaultMutableTreeNode("root");
tree = new JTree(root);
// Add it and make it take care of scrolling:
add(new JScrollPane(tree),
BorderLayout.CENTER);
// Capture the tree's model:
model =(DefaultTreeModel)tree.getModel();
JButton test = new JButton("Press me");
test.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e){
if(i < data.length) {
child = new Branch(data[i++]).node();
// What's the last one you clicked?
chosen = (DefaultMutableTreeNode)
tree.getLastSelectedPathComponent();
if(chosen == null) chosen = root;
// The model will create the
// appropriate event. In response, the
// tree will update itself:
model.insertNodeInto(child, chosen, 0);
// This puts the new node on the
// currently chosen node.
}
}
});
// Change the button's colors:
test.setBackground(Color.blue);
test.setForeground(Color.white);
JPanel p = new JPanel();
p.add(test);
add(p, BorderLayout.SOUTH);
}

  public static void main(String args[]) {
    JFrame f = new JFrame();
    f.getContentPane().add(new Trees());
    f.setSize(200,150);
    f.setTitle("树的示例");
    f.show();
  }
}

/* String[][] data = {
     {"体育", "足球", "篮球", "乒乓球"},
     {"娱乐", "唱歌", "跳舞", "相声" },
     {"电视", "长虹", "海尔", "创维"},
     {"戏剧", "京剧", "川剧", "越剧"},
     {"国家", "中国", "越南", "朝鲜" },
     {"武器", "飞机", "大炮", "坦克"},
 };*/