如何按字母顺序排列名字

Question

我有3个元素，他们有名字和姓氏的一个按钮。我需要检查他们是否按字母排序，然后按姓氏排序。元素的页面对象是ListV_Sorted。我想我只是按名字排序。 0元素=杰克丹尼尔斯，1元素=约翰费拉，2元素=麦克杜罗夫。 ListV是元素的页面对象。我得到一个错误它说预计真实但发现错误。

@SuppressWarnings("unchecked") 
public void sortingOrder() { 

    Log.log(driver).info("About to Alphebetically Sort"); 
    List<MobileElement> products_MobileElements = new LinkedList<MobileElement>(); 
    products_MobileElements = (List<MobileElement>) TicketPassesNames; 
    LinkedList<String> product_names = new LinkedList<String>(); 

    for(int i=0;i<products_MobileElements.size();i++){ 

     String s = products_MobileElements.get(i).getAttribute("checked"); 
     String[] tokens = s.split(""); 
     String firstName = ""; 
     String lastName = ""; 
     if(tokens.length > 0) { 
      firstName = tokens[0]; 
      lastName = tokens[tokens.length -1]; 
      product_names.add(s); 
      product_names.add(firstName); 
      product_names.add(lastName); 
     } 
    } 
    boolean result = checkAlphabeticalOrder(product_names); 

    Assert.assertEquals(checkAlphabeticalOrder(product_names), true); 
    Log.log(driver).info("Tickest Passes names are in alphabetical order."); 
    System.out.println(result); 
} 

//Method takes a String to Sort AlphabeticalLy 
public static boolean checkAlphabeticalOrder(LinkedList<String> product_names){ 

    String previous = ""; // empty string 

    for (final String current: product_names) { 
     if (current.compareTo(previous) < 0) 
      return false; 
     previous = current; 
    } 

    return true; 
} 

Answer 1

取而代之的是java.util.LinkedList你应该使用java.util.TreeSet排序使用的数据结构中的输入。

我已经创建了一个稍微改变的代码版本，在程序执行后打印出“true”。主要区别在于使用java.util.TreeSet和Collection接口。

这里是改变的版本：

import java.text.ParseException; 
import java.util.Arrays; 
import java.util.Collection; 
import java.util.List; 
import java.util.TreeSet; 

public class SimpleTests2 { 

    public static void main(String[] args) throws ParseException { 

     sortingOrder(); 
    } 

    //Method takes a String to Sort AlphabeticalLy 
    public static boolean checkAlphabeticalOrder(Collection<String> product_names) { 

     String previous = ""; // empty string 

     for (final String current : product_names) { 
      if (current.compareTo(previous) < 0) 
       return false; 
      previous = current; 
     } 

     return true; 
    } 

    @SuppressWarnings("unchecked") 
    public static void sortingOrder() { 

//  Log.log(driver).info("About to Alphebetically Sort"); 
     List<MobileElement> products_MobileElements; 
     products_MobileElements = Arrays.asList(
       new MobileElement("Mike Durov"), new MobileElement("Jack Daniels"), new MobileElement("John Fera")); 
     // Here is the main change to your code! 
     Collection<String> product_names = new TreeSet<>(); 

     for (int i = 0; i < products_MobileElements.size(); i++) { 

      String s = products_MobileElements.get(i).getAttribute("checked"); 
      String[] tokens = s.split(" "); 
      String firstName = ""; 
      String lastName = ""; 
      if (tokens.length > 0) { 
       firstName = tokens[0]; 
       lastName = tokens[tokens.length - 1]; 
       product_names.add(s); 
       product_names.add(firstName); 
       product_names.add(lastName); 
      } 
     } 
     boolean result = checkAlphabeticalOrder(product_names); 

//  Assert.assertEquals(checkAlphabeticalOrder(product_names), true); 
//  Log.log(driver).info("Tickest Passes names are in alphabetical order."); 
     System.out.println(result); 
     System.out.println(product_names); 
    } 


    private static class MobileElement { 

     private String name; 

     public MobileElement(String name) { 
      this.name = name; 
     } 

     public String getAttribute(String checked) { 
      return name; 
     } 
    } 
}