Programmieren in Java - HostFiXX.de

Programmieren in Java
1. Ein Baum, der aus DefaultMutableTreeNodes aufgebaut ist 303 .
import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;
public class SimpleTree extends JFrame
{
public SimpleTree()
{
super("Creating a Simple JTree");
// WindowUtilities.setNativeLookAndFeel();
/* try {
UIManager.setLookAndFeel(
UIManager.getSystemLookAndFeelClassName());
}
catch(Exception e)
{
System.out.println("Error setting native L&F: " + e);
} */
// addWindowListener(new ExitListener());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container content = getContentPane();
Object[] hierarchy =
{ "javax.swing",
"javax.swing.border",
"javax.swing.colorchooser",
"javax.swing.event",
"javax.swing.filechooser",
new Object[] { "javax.swing.plaf",
"javax.swing.plaf.basic",
"javax.swing.plaf.metal",
"javax.swing.plaf.multi" },
"javax.swing.table",
new Object[] { "javax.swing.text",
new Object[] { "javax.swing.text.html",
"javax.swing.text.html.parser" },
"javax.swing.text.rtf" },
"javax.swing.tree",
"javax.swing.undo" };
DefaultMutableTreeNode root = processHierarchy(hierarchy);
JTree tree = new JTree(root);
content.add(new JScrollPane(tree), BorderLayout.CENTER);
setSize(275, 300);
setVisible(true);
}
public static void main(String[] args)
{
new SimpleTree();
}
/** Small routine that will make node out of the first entry
* in the array, then make nodes out of subsequent entries
* and make them child nodes of the first one. The process is
* repeated recursively for entries that are arrays.
*/
private DefaultMutableTreeNode
processHierarchy(Object[] hierarchy)
{
DefaultMutableTreeNode node =
new DefaultMutableTreeNode(hierarchy[0]);
DefaultMutableTreeNode child;
for(int i=1; i