java+selenium——打开多个窗口，并切换窗口——方法一

package rjcs;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.List;
import java.util.Set;

import org.openqa.selenium.interactions.Actions;
import org.apache.commons.io.FileUtils;
import org.openqa.selenium.TakesScreenshot;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.interactions.Actions;
import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebElement;
import org.testng.annotations.Test;
import org.openqa.selenium.*;

import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.openqa.selenium.OutputType;

import com.thoughtworks.selenium.SeleneseTestNgHelper;

public class ckqh 
{
    
    public static void main(String[] args)
    
    {
         System.setProperty("webdriver.firefox.bin","C:\\Program Files (x86)\\Mozilla Firefox\\firefox.exe");    //设置火狐的安装路径，防止系统找不到
            
         FirefoxDriver driver = new FirefoxDriver();        //初始化FireFox浏览器实例，并打开浏览器
         
        try
        {
             driver.manage().window().maximize();         //最大化窗口
             
             Thread.sleep(3000);        
             
             driver.manage().window().maximize();         //最大化窗口
             
             Thread.sleep(3000);
        
             driver.get("https://www.baidu.com");                    //打开一个网址，方法一             
        
             Thread.sleep(3000);                  
                          
              driver.findElementByPartialLinkText("设为主页").click();

             Thread.sleep(3000);  
             
             
             
             System.out.println(driver.getWindowHandle());    //打印当前浏览器的当前标签页的句柄
             
             String a = driver.getWindowHandle();
             
             Thread.sleep(3000); 
             
             System.out.println(driver.getWindowHandles());    //打印当前浏览器的所有标签页的句柄
                                                               //打印出来是一个list
             Thread.sleep(3000); 
             
             Set<String> currenWindow = driver.getWindowHandles ();         //获取所有句柄
             System.out.println (currenWindow.size ());              //打印句柄（即窗口）的个数

             Thread.sleep(3000);            
             
             driver.switchTo().window(a);    //切换句柄
             
             Thread.sleep(3000); 
             
        }catch (Exception e) 
        {
            e.printStackTrace();
        }finally 
        {
            driver.quit();
        
         }
   }

}