Adding a Admin Style Table in a WordPress 4.x Page

We need to made few changes in the code so that it works properly. Here is the updated code.

<?php
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

if ( ! class_exists( 'WP_List_Table' ) ) {
    require_once ABSPATH . 'wp-admin/includes/class-wp-list-table.php';
}

class Transactions_List_Table extends WP_List_Table {
    public function __construct() {
        parent::__construct( array(
            'singular' => 'transaction',
            'plural'   => 'transactions',
            'ajax'     => false,
        ) );
    }

    // Here are preparing our items.
    public function prepare_items() {
        // Here we would normally retrieve data from the database.
        $this->items = array(
            array( 'id' => 1, 'name' => 'Transaction 1', 'amount' => '$100' ),
            array( 'id' => 2, 'name' => 'Transaction 2', 'amount' => '$200' ),
        );

        $this->_column_headers = array( $this->get_columns(), array(), array() );
    }

    public function get_columns() {
        return array(
            'id'     => __( 'ID', 'textdomain' ),
            'name'   => __( 'Transaction Name', 'textdomain' ),
            'amount' => __( 'Amount', 'textdomain' ),
        );
    }

    public function column_default( $item, $column_name ) {
        switch ( $column_name ) {
            case 'id':
            case 'name':
            case 'amount':
                return $item[ $column_name ];
            default:
                return '';
        }
    }

    public function display() {
        echo '<div class="wrap">';
        echo '<h2>' . __( 'Transactions', 'textdomain' ) . '</h2>';
        parent::display();
        echo '</div>';
    }
}

function render_transactions_list_page() {
    $transactions_table = new Transactions_List_Table();
    $transactions_table->prepare_items();
    ob_start();
    $transactions_table->display();
    return ob_get_clean();
}

// We have added this to a shortcode to display it on a regular page.
add_shortcode( 'transactions_table', 'render_transactions_list_page' );