Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.JViewport;

public class Main extends JPanel {
    public Main() {
        super();
        JTree tree = new JTree();
        for (int i = 0; i < tree.getRowCount(); i++) {
            tree.expandRow(i);
        }

        final JScrollPane pane = new JScrollPane(tree) {
            Dimension prefSize = new Dimension(200, 150);

            public Dimension getPreferredSize() {
                return prefSize;
            }
        };

        pane.getVerticalScrollBar().addAdjustmentListener(e -> {
            JViewport vp = pane.getViewport();
            if (vp.getView().getHeight() <= vp.getHeight() + vp.getViewPosition().y) {
                System.out.println("End");
            }
        });

        add(pane);
    }

    public static void main(String[] args) {
        final JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new Main());
        frame.pack();
        frame.setVisible(true);
    }
}