Question

在点1和点2下面是我的输入，在下面的代码中，我试图比较Arraylist以获取匹配和不匹配的元素，但是我仅获取不匹配的记录。

arraylist1 = [检查文档等于，文档日期如等于，基金编号如等于，帐号如等于，锡如等于，公司编号如等于，经销商编号如等于，会员编号如等于，，组ID像等于，帐户类型像等于，文档类型代码像等于，打印等于，测试两个]
arraylist2 = [文档日期类似等于两者之间，基金数量相等喜欢，帐号喜欢等于在，锡等于像，公司编号等于喜欢，经销商编号喜欢等于]

3。当我试图从空间“ arrayList2”中删除多余内容时 [文档日期LikeEqualsBetween，资金编号EqualsLike，帐号LikeEqualsIn，锡EqualsLike，

我的代码从这里开始

      HashSet<String> hs1 = new HashSet<String>();
       HashSet<String> hs2 = new HashSet<String>();
        for (String match : arraylist2 ) {
         hs1.add(match);
      }
          for (String match : arraylist1) {
        hs2.add(match);
      }
      for (String match : hs2) {
     boolean b = hs1.add(match);
     if (b == false) {
         matchingFields = match;
         System.out.println("-----------------matching Elements--------------------- =  " + 
          matchingFields);

     } else {
         nonMatchingFields = match;
         System.out.println("-----------------Not matching elements---------------------  =  " + 
       nonMatchingFields);
     }
 }

4。下面是我得到的输出，您可以看到我只得到不匹配的值，没有匹配的值。

    --------Not matching elements---------------------  =  Document Type Code Like Equals In
    ---------Not matching elements---------------------  =  Test  two 
   --------Not matching elements---------------------  =  Document Date Like Equals Between
   -----------------Not matching elements---------------------  =  Check Document  Equals 
   -----------------Not matching elements---------------------  =  Member Id Like Equals In
  -----------------Not matching elements---------------------  =  Dealer Number Like Equals In
    -----------------Not matching elements---------------------  =  Print  Equals 
   -----------------Not matching elements---------------------  =  Group Id Like Equals In
-----------------Not matching elements---------------------  =  Fund Number Like Equals 
-----------------Not matching elements---------------------  =  Tin Like Equals 
-----------------Not matching elements---------------------  =  Account Type Like Equals In

-----------------不匹配的元素--------------------- =帐号等于 -----------------不匹配元素--------------------- =公司编号等于

Answer 1

我用一个简单的main方法设置了它，这似乎对我有用。您可能想通过像我这样的简单示例进行尝试。

package test;

import java.util.ArrayList;
import java.util.HashSet;

class Test{
    public static void main(String[] args) {
        ArrayList<String> a1 = new ArrayList<String>();
        a1.add("a");
        a1.add("b");

        ArrayList<String> a2 = new ArrayList<String>();
        a2.add("c");
        a2.add("a");
        checkMatch(a1, a2);
    }


    public static void checkMatch(ArrayList<String> arraylist1, ArrayList<String> arraylist2 ) {
        HashSet<String> hs1 = new HashSet<String>();
        HashSet<String> hs2 = new HashSet<String>();
        for (String match : arraylist2 ) {
            hs1.add(match);
        }
        for (String match : arraylist1) {
            hs2.add(match);
        }
        for (String match : hs2) {
            boolean b = hs1.add(match);
            if (b == false) {
                String matchingFields = match;
                System.out.println("-----------------matching Elements--------------------- =  " + 
                        matchingFields);

            } else {
                String nonMatchingFields = match;
                System.out.println("-----------------Not matching elements---------------------  =  " + 
                        nonMatchingFields);
            }
        }
    }
}

输出：

-----------------匹配元素--------------------- = a

-----------------不匹配的元素--------------------- = b

Answer 2

您可以通过使用单个哈希图来达到相同的结果。

import java.util.*;

public class Practice {
    
    public static void main(String[] args) {
         
        ArrayList<String> arraylist1 = new ArrayList<>(Arrays.asList("Check Document Equals" , "Document Date Like Equals Between", "Fund Number Like Equals" , "Account Number Like Equals In", "Tin Like Equals" , "Company Number Like Equals" , "Dealer Number Like Equals In", "Member Id Like Equals In", "Group Id Like Equals In", "Account Type Like Equals In", "Document Type Code Like Equals In", "Print Equals" , "Test two" ));
        ArrayList<String> arraylist2 = new ArrayList<>(Arrays.asList("Document Date Like Equals Between", "Fund Number Equals Like", "Account Number Like Equals In", "Tin Equals Like", "Company Number Equals Like", "Dealer Number Like Equals"));

        HashSet<String> hs = new HashSet<String>(arraylist1);

        for (String match : arraylist2) {
            
            if (hs.contains(match)) {
                System.out.println("-----------------matching Elements--------------------- =  " + match);
            }
            else {                
                System.out.println("-----------------Not matching elements---------------------  =  " + match);
            }
        }

    }
}

如何比较两个列表以获取匹配元素和不匹配元素

2 个答案: