Why is my jframe not the full size I set it to be?

package graphq.gui;

import java.awt.AlphaComposite;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.List;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

import graphq.Handler;
import graphq.utils.Tool;

public class Canvas {
	private Rectangle selection;
	private Point clickPoint;

	public static void main(String[] args) {
		new Canvas();
	}

	public Canvas() {
		EventQueue.invokeLater(new Runnable() {
			@Override
			public void run() {
				try {
					UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
				} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
						| UnsupportedLookAndFeelException ex) {
					ex.printStackTrace();
				}

				// main frame
				JFrame frame = new JFrame("Graphq Paint");
				frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				frame.add(new Pane());
				frame.setSize(1920, 1080);
				frame.setLocationRelativeTo(null);
				frame.setVisible(true);

				// tool box
				JFrame toolFrame = new JFrame();
				JButton pencil = new JButton();
				JButton select = new JButton();
				toolFrame.add(pencil);
				toolFrame.add(select);
				pencil.setSize(64, 64);
				select.setSize(64, 64);
				toolFrame.setVisible(true);
				toolFrame.setSize(128, 64);
				toolFrame.pack();

				// buttons
				pencil.addActionListener(new pencilClick());
				select.addActionListener(new selectClick());
				ImageIcon pencilIcon = new ImageIcon("./src/images/pencil.png");
				pencil.setIcon(pencilIcon);

				ImageIcon selectIcon = new ImageIcon("./src/images/select.png");
				select.setIcon(selectIcon);
			}
		});
	}

	public class pencilClick implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			Handler.setSelectedTool(Tool.PENCIL);
		}
	}

	public class selectClick implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			Handler.setSelectedTool(Tool.SELECT);
		}
	}

	public class Pane extends JPanel {

		private List<List<Point>> points;

		public Pane() {
			points = new ArrayList<>(25);
			MouseAdapter ma = new MouseAdapter() {
				private List<Point> currentPath;

				@Override
				public void mousePressed(MouseEvent e) {
					if (Handler.getSelectedTool() == Tool.PENCIL) {
						currentPath = new ArrayList<>(25);
						currentPath.add(e.getPoint());

						points.add(currentPath);
					}
					if (Handler.getSelectedTool() == Tool.SELECT) {
						clickPoint = e.getPoint();
						selection = null;
					}
				}

				@Override
				public void mouseDragged(MouseEvent e) {
					if (Handler.getSelectedTool() == Tool.PENCIL) {
						Point dragPoint = e.getPoint();
						currentPath.add(dragPoint);
						repaint();
					}

					if (Handler.getSelectedTool() == Tool.SELECT) {
						Point dragPoint = e.getPoint();
						int x = Math.min(clickPoint.x, dragPoint.x);
						int y = Math.min(clickPoint.y, dragPoint.y);

						int width = Math.max(clickPoint.x, dragPoint.x) - x;
						int height = Math.max(clickPoint.y, dragPoint.y) - y;

						if (selection == null) {
							selection = new Rectangle(x, y, width, height);
						} else {
							selection.setBounds(x, y, width, height);
						}
						repaint();
					}

				}

				@Override
				public void mouseReleased(MouseEvent e) {
					if (Handler.getSelectedTool() == Tool.PENCIL) {
						currentPath = null;
					}
					if (Handler.getSelectedTool() == Tool.SELECT) {
						selection = null;
						repaint();
					}

				}

			};

			addMouseListener(ma);
			addMouseMotionListener(ma);
		}

		@Override
		public Dimension getPreferredSize() {
			return new Dimension(200, 200);
		}

		protected void paintComponent(Graphics g) {
			if (Handler.getSelectedTool() == Tool.PENCIL) {
				super.paintComponent(g);
				Graphics2D g2d = (Graphics2D) g.create();
				for (List<Point> path : points) {
					Point from = null;
					for (Point p : path) {
						if (from != null) {
							g2d.drawLine(from.x, from.y, p.x, p.y);
						}
						from = p;
					}
				}
				g2d.dispose();
			}

			if (Handler.getSelectedTool() == Tool.SELECT) {
				super.paintComponent(g);
				if (selection != null) {
					g.setColor(UIManager.getColor("List.selectionBackground"));
					Graphics2D g2d = (Graphics2D) g.create();
					g2d.setComposite(AlphaComposite.SrcOver.derive(0.5f));
					g2d.fill(selection);
					g2d.dispose();
					g2d = (Graphics2D) g.create();
					g2d.draw(selection);
					g2d.dispose();
				}
			}

		}

	}

	public void actionPerformed(ActionEvent arg0) {
		// TODO Auto-generated method stub

	}

}

toolFrame.setSize(64, 128);

<pre lang="java">toolFrame.pack();

toolFrame.getContentPane().setSize();