How to Validate HTML Tables Using Cucumber DataTables and Selenium

import io.cucumber.datatable.DataTable;
import org.junit.Assert;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;

import java.util.List;

public class HtmlTableValidationPage {

    private final WebDriver webDriver;

    public HtmlTableValidationPage(WebDriver webDriver) {
        this.webDriver = webDriver;
    }

    public void verifyHtmlTableData(DataTable dataTable) {
        WebElement htmlTableElement = webDriver.findElement(By.xpath("//table[@id="customers"]")); //get the table WebElement
        List<WebElement> rowElements = htmlTableElement.findElements(By.xpath(".//tr")); //get all of the row WebElements from the table
        rowElements.remove(0); //remove the "header" row from the list of row WebElements

        List<List<String>> dataTableRows = dataTable.asLists(); //outer List<> is rows, inner List<> is cells
        for (List<String> row : dataTableRows) { //loop through every row in the DataTable input
            int rowIdx = dataTableRows.indexOf(row);
            WebElement rowElem = rowElements.get(rowIdx); //get the row WebElement based on the index of the current row in the DataTable
            List<WebElement> cellElements = rowElem.findElements(By.xpath(".//td")); //get all of the cells from the row WebElement

            for (String expectedCell : row) { //loop through every cell in the current DataTable row
                int cellIdx = row.indexOf(expectedCell);
                String actualCell = cellElements.get(cellIdx).getText();

                /*
                System.out.println for demonstration purposes
                 */
                System.out.println("DataTable row " + rowIdx + ", cell " + cellIdx + ": " + expectedCell);
                System.out.println("Actual value on the page: " + actualCell);

                Assert.assertEquals("Expected value of cell should match actual value of cell",
                        expectedCell, actualCell);
            }
        }
    }
}