public class DataSource {

private static final String USER = "user";
private static final String PASSWORD = "root";
private static final String URL = "jdbc:oracle:thin:@localhost:1521:xe";

public static Connection getConnection(){
    Connection connection = null;
    try {
        Class.forName("oracle.jdbc.driver.OracleDriver");
        connection = DriverManager.getConnection(URL, USER, PASSWORD);

    } catch (SQLException e) {
        System.err.println("Unable to connect");

    } catch (ClassNotFoundException e) {
        System.err.println("No driver");
    }
    return connection;
}