在Eclipse上使用Java无法在两个类之间传递Selenium WebDriver

Question

  package selenium;
import java.util.Scanner;
public class main {
    private static int bflag = 0;   
    public static void main(String[] args) {
        // TODO Auto-generated method stub
           System.out.println("Which browser would you like to run");
           System.out.println("1. Chrome ");
           System.out.println("2. Firefox");
        Scanner input = new Scanner(System.in);
        bflag = input.nextInt();
        driver frame =new driver();
}   
  public static int getFlagValue()

  {
    return bflag;}}

驱动程序类

    package selenium;

import java.util.Scanner;

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class driver {
    
    private static int socialflag = 0;
    public static WebDriver driver;
    
    
    public driver() {

        switch (main.getFlagValue()) {

          case 1:

            chrome();
            socialsite();
            social frame = new social();

            break;

          case 2:

            firefoxdriver();
            socialsite();
            social frame1 = new social();
            break;

          default:

            break;
        }
        }

public void chrome() 
{
System.setProperty("webdriver.chrome.driver", "/Users/lcren1026/Drivers/chromedriver");
ChromeDriver driver = new ChromeDriver();  
}

public  void firefoxdriver() 
{
  //Points to the browser driver
System.setProperty("webdriver.gecko.driver", "/Users/lcren1026/Drivers/geckodriver");     
FirefoxDriver driver = new FirefoxDriver();
}

public void socialsite()
{
     System.out.println("Which social site would you like to run with the browser selected?");
       System.out.println("1. Facebook ");
       System.out.println("2. Twitter");

        Scanner input = new Scanner(System.in);
        socialflag = input.nextInt();
}

  public static int getSFlagValue()

  {
    return socialflag;
  }
  
  public static WebDriver getDriverFlagValue()

  {
    return driver;
  }}

社会阶层

package selenium;

import org.openqa.selenium.WebDriver;

public class social {
    
     public social() {

            switch (driver.getSFlagValue()) {

              case 1:

                facebook();

                break;

              case 2:

                twitter();

                break;

              default:

                break;
            }
            }

        public void facebook() 
        {       
        //WebDriver drive = driver.getDriverFlagValue();    
        driver.getDriverFlagValue().navigate().to( "www.facebook.com");     
    }   
    
    public void twitter() 
    {   
        //WebDriver drive = driver.getDriverFlagValue();    
    driver.getDriverFlagValue().navigate().to( "www.twitter.com");  
    }}