Question

 String[] arr = {"Month","Jan","Feb","Mar", "Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
 WebElement dropDown = getDriver().findElement(By.id("month"));
 Select select = new Select(dropDown);
 List<WebElement> options = select.getOptions();

 for(WebElement we : options){
     for(int i = 1; i<arr.length; i++){
         if(we.getText().equals(arr[i])){
             System.out.println("Matched" );
             break;
         }
     }
 }

我想通过在Java中使用Selenium在Facebook下拉菜单中查找重复的月份。

我尝试了findelement，web元素，但是我做不到。马上;我可以将月份与网页相匹配。原始问题是这样的：查找月份下拉列表是否包含重复项。如果是，则打印出重复的值。 thnx

Answer 1

由于您的用例是通过使用 Selenium 和 Java 在Facebook下拉列表中查找重复的月份，因此您实际上不需要引用数组。要查找月份下拉列表是否包含重复项并打印出重复的值，可以使用以下解决方案：

此代码块从 Facebook 上的下拉列表中提取月的列表：

System.setProperty("webdriver.chrome.driver", "C:\\Utility\\BrowserDrivers\\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.get("https://www.facebook.com");
WebElement dropDown = driver.findElement(By.id("month"));
Select select = new Select(dropDown);
List<WebElement> options = select.getOptions();
ArrayList<String> months = new  ArrayList<>();
for(WebElement we : options)
    months.add(we.getText());
System.out.println("Current list of months: " +months);

为了通过代码块进行示范，我们将添加3个重复的条目：
```
months.add("Month");
months.add("Feb");
months.add("Dec");
```

在此代码块中，我们创建了一个函数，用于返回重复的月份：

public static Set<String> findDuplicates(List<String> listContainingDuplicates)
{ 
    final Set<String> setToReturn = new HashSet<>();
    final Set<String> set1 = new HashSet<>();
    for (String myString : listContainingDuplicates)
    {
        if (!set1.add(myString))
            setToReturn.add(myString);
    }
    System.out.println("Unique months: " +set1);
    return setToReturn;
}

现在，您可以按以下方式调用函数findDuplicates()：

System.out.println("Duplicated months: " +findDuplicates(months));

因此完整的解决方案将是：

package Duplicates;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.Select;


public class Find_Duplicates_In_List {

    public static void main(String[] args) {

        System.setProperty("webdriver.chrome.driver", "C:\\Utility\\BrowserDrivers\\chromedriver.exe");
        WebDriver driver = new ChromeDriver();
        driver.get("https://www.facebook.com");
        WebElement dropDown = driver.findElement(By.id("month"));
        Select select = new Select(dropDown);
        List<WebElement> options = select.getOptions();
        ArrayList<String> months = new  ArrayList<>();
        for(WebElement we : options)
        months.add(we.getText());
        System.out.println("Current list of months: " +months);
        months.add("Month");
        months.add("Feb");
        months.add("Dec");
        System.out.println("Duplicated months: " +findDuplicates(months));
    }

    public static Set<String> findDuplicates(List<String> listContainingDuplicates)
    { 
      final Set<String> setToReturn = new HashSet<>();
      final Set<String> set1 = new HashSet<>();
      for (String myString : listContainingDuplicates)
      {
       if (!set1.add(myString))
        setToReturn.add(myString);
      }
      System.out.println("Unique months: " +set1);
      return setToReturn;
    }
}

控制台输出：

Current list of months: [Month, Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sept, Oct, Nov, Dec]
Unique months: [Jul, Oct, Feb, Apr, Jun, Dec, May, Month, Sept, Aug, Nov, Jan, Mar]
Duplicated months: [Month, Feb, Dec]

如何验证Facebook上的月份下拉列表是否包含重复项？

1 个答案: