Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;

public class Main extends JPanel {
    JTree tree = new JTree();

    public Main() {
        super(new BorderLayout());
        JScrollPane jsp = new JScrollPane(tree);
        add(jsp, BorderLayout.CENTER);
    }

    public static void main(String[] args) {
        Main temp = new Main();
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(temp);
        frame.pack();
        frame.setVisible(true);
        Thread updater = new Thread(temp.new CustomThread());
        updater.start();
    }

    public class CustomThread implements Runnable {
        @Override
        public void run() {
            for (int i = 0; i < 1000; i++) {
                updateTree("New Item " + i);
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }

        public void updateTree(final String nodeToAdd) {
            DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
            DefaultMutableTreeNode root = (DefaultMutableTreeNode) tree.getModel().getRoot();
            DefaultMutableTreeNode child = new DefaultMutableTreeNode(nodeToAdd);
            model.insertNodeInto(child, root, root.getChildCount());
            tree.scrollPathToVisible(new TreePath(child.getPath()));
        }
    }
}