JTree Traversing Trees In Java Swing Example

Chapter: Swing Last Updated: 22-07-2016 11:03:02 UTC

Program:

            /* ............... START ............... */
                
import java.awt.BorderLayout;
import java.util.Enumeration;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeNode;

public class JavaJTreeTraversingExample {

	public static void main(String args[]) {
		JFrame frame = new JFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
		DefaultMutableTreeNode mercury = new DefaultMutableTreeNode("Mercury");
		root.add(mercury);
		DefaultMutableTreeNode venus = new DefaultMutableTreeNode("Venus");
		root.add(venus);
		DefaultMutableTreeNode mars = new DefaultMutableTreeNode("Mars");
		root.add(mars);
		JTree tree = new JTree(root);

		JScrollPane scrollPane = new JScrollPane(tree);
		frame.add(scrollPane, BorderLayout.CENTER);
		frame.setSize(300, 150);
		frame.setVisible(true);

		printDescendants(root);
	}

	public static void printDescendants(TreeNode root) {
		System.out.println(root);
		Enumeration children = root.children();
		if (children != null) {
			while (children.hasMoreElements()) {
				printDescendants((TreeNode) children.nextElement());
			}
		}
	}
}
                /* ............... END ............... */
        

Output

Root
Mercury
Venus
Mars
JTree Traversing Trees In Java Swing Example

Tags

JTree Traversing Trees Swing, Java

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