ツリー

木構造の表示

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.JComponent
                    |
                    +--javax.swing.JTree

public class JTree extends JComponent
	implements Scrollable, Accessible

import java.util.*;
import java.awt.*;
import javax.swing.*;

public class Test extends JApplet {
	public void init() {
		String str1[] = {
			"涼宮 遙" , "速瀬 水月" , "涼宮 茜" ,
			"大空寺 あゆ" , "玉野 まゆ"
		};
		String str2[] = {
			"鑑 純夏" , "御剣 冥夜" , "榊 千鶴" ,
			"彩峰 慧" , "珠瀬 壬姫"
		};

		Hashtable node = new Hashtable();
		node.put("The forever that you wish" , str1);
		node.put("MUV-LUV" , str2);

		JTree tree = new JTree(node);
		getContentPane().add(new JScrollPane(tree));
	}
}

public class DefaultMutableTreeNode extends Object
	implements Cloneable, MutableTreeNode, Serializable

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

public class Test extends JApplet {
	public void init() {
		MutableTreeNode node[] = {
			new DefaultMutableTreeNode("涼宮 遙") ,
			new DefaultMutableTreeNode("速瀬 水月") ,
			new DefaultMutableTreeNode("涼宮 茜") ,
			new DefaultMutableTreeNode("大空寺 あゆ") ,
			new DefaultMutableTreeNode("玉野 まゆ")
		};
		DefaultMutableTreeNode root = 
			new DefaultMutableTreeNode("The forever that you wish");
		for(int i = 0 ; i < node.length ;i++) root.add(node[i]);

		JTree tree = new JTree(root);
		getContentPane().add(new JScrollPane(tree));
	}
}

ツリーのイベント

java.lang.Object
  |
  +--java.util.EventObject
        |
        +--javax.swing.event.TreeSelectionEvent

public class TreeSelectionEvent extends EventObject

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

public class Test extends JApplet implements TreeSelectionListener {
	public void init() {
		MutableTreeNode leaf1[] = {
			new DefaultMutableTreeNode("大空寺 あゆ") ,
			new DefaultMutableTreeNode("玉野 まゆ")
		};
		MutableTreeNode leaf2[] = {
			new DefaultMutableTreeNode("彩峰 慧") ,
			new DefaultMutableTreeNode("榊 千鶴")
		};
		DefaultMutableTreeNode node1 =
			new DefaultMutableTreeNode("The forever that you wish");
		DefaultMutableTreeNode node2 =
			new DefaultMutableTreeNode("MUV-LUV");
		for(int i = 0 ; i < leaf1.length ;i++) node1.add(leaf1[i]);
		for(int i = 0 ; i < leaf2.length ;i++) node2.add(leaf2[i]);

		DefaultMutableTreeNode root = 
			new DefaultMutableTreeNode("Age");
		root.add(node1);
		root.add(node2);

		JTree tree = new JTree(root);
		tree.addTreeSelectionListener(this);

		getContentPane().add(new JScrollPane(tree));
	}
	public void valueChanged(TreeSelectionEvent e) {
		JOptionPane.showMessageDialog(
			this , e.getPath().getPath() , "Forget me Not" , 
			JOptionPane.INFORMATION_MESSAGE
		);

	}
}

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

public class Test extends JApplet implements TreeExpansionListener {
	Label label = new Label("展開されたノード");
	public void init() {
		MutableTreeNode leaf1[] = {
			new DefaultMutableTreeNode("大空寺 あゆ") ,
			new DefaultMutableTreeNode("玉野 まゆ")
		};
		MutableTreeNode leaf2[] = {
			new DefaultMutableTreeNode("彩峰 慧") ,
			new DefaultMutableTreeNode("榊 千鶴")
		};
		DefaultMutableTreeNode node1 =
			new DefaultMutableTreeNode("The forever that you wish");
		DefaultMutableTreeNode node2 =
			new DefaultMutableTreeNode("MUV-LUV");
		for(int i = 0 ; i < leaf1.length ;i++) node1.add(leaf1[i]);
		for(int i = 0 ; i < leaf2.length ;i++) node2.add(leaf2[i]);

		DefaultMutableTreeNode root = 
			new DefaultMutableTreeNode("Age");
		root.add(node1);
		root.add(node2);

		JTree tree = new JTree(root);
		tree.addTreeExpansionListener(this);

		getContentPane().add(new JScrollPane(tree));
		getContentPane().add(label , BorderLayout.NORTH);
	}
	public void treeExpanded(TreeExpansionEvent e) {
		label.setText("Expanded " + e.getPath().toString());
	}
	public void treeCollapsed(TreeExpansionEvent e) {
		label.setText("Collapsed " + e.getPath().toString());
	}
}

ノードの選択

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

public class Test extends JApplet {
	public void init() {
		MutableTreeNode node[] = {
			new DefaultMutableTreeNode("大空寺 あゆ") ,
			new DefaultMutableTreeNode("玉野 まゆ")
		};
		DefaultMutableTreeNode root = 
			new DefaultMutableTreeNode("The forever that you wish");
		for(int i = 0 ; i < node.length ;i++) root.add(node[i]);

		JTree tree = new JTree(root);
		tree.getSelectionModel().setSelectionMode(
			TreeSelectionModel.SINGLE_TREE_SELECTION
		);
		getContentPane().add(new JScrollPane(tree));
	}
}

public class DefaultTreeSelectionModel extends Object
	implements Cloneable, Serializable, TreeSelectionModel