LayeredPaneTest.java

package com.sample.layered;

import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;

import static java.util.stream.IntStream.range;

public class LayeredPaneTest {

    private JFrame frame;

    private JTable table;

    public LayeredPaneTest() {
        initialize();
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    LayeredPaneTest window = new LayeredPaneTest();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    private void initialize() {
        frame = new JFrame();
        frame.setBounds(100, 100, 589, 509);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        frame.getContentPane().add(panel, BorderLayout.CENTER);

        table = new JTable();
        table.setSize(500, 200);
        DefaultTableModel tableModel = new DefaultTableModel();
        range(0, 10).forEach(i -> tableModel.addColumn("Column " + i));
        range(0, 30).mapToObj(r -> range(0, 10).mapToObj(c -> "R" + r + " C" + c).toArray(String[]::new)).forEach(tableModel::addRow);
        table.setModel(tableModel);
        JLayeredPane layers = new JLayeredPane() {
            @Override
            public Dimension getPreferredSize() {
                return table.getPreferredSize();
            }

            @Override
            public void setSize(int width, int height) {
                super.setSize(width, height);
                table.setSize(width, height);
            }

            @Override
            public void setSize(Dimension d) {
                super.setSize(d);
                table.setSize(d);
            }
        };
        layers.setLayout(null);
        layers.add(table, JLayeredPane.DEFAULT_LAYER, 0);

        JPanel overlayPanel = new JPanel();
        overlayPanel.setBackground(new Color(213, 134, 145, 123));
        overlayPanel.setBounds(100, 100, 200, 150);
        layers.add(overlayPanel, JLayeredPane.DRAG_LAYER, 0);
        panel.setLayout(new BorderLayout(0, 0));
        JScrollPane scrolling = new JScrollPane(layers);
        scrolling.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        scrolling.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        scrolling.setViewportView(layers);
        scrolling.setColumnHeaderView(table.getTableHeader());

        panel.add(scrolling);

    }

}