`How to compare two ArrayList`s by their contents
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<div class="content__item-top-div"> <a class="content__item-top-name" href="#!">student_1</a><span class="content__item-top-p">2021-10-27 05:54:16</span></div>
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<div class="content__item-row dn"> <a href="#!"><b>student_1</b>,</a> 2021-10-27 05:54:16</div>
<p class="content__item-title large">How to compare two ArrayList`s by their contents?</p>
<p class="content__item-detail sm">
There are two sheets:<br>
<blockquote> private List rbsList;</blockquote><br>
and <blockquote>private List partnerList;</blockquote><br>
I want to compare two sheets by their content in an object. <br>
But my code is not working. <br>
Question: What is wrong here and how to implement it correctly? <br>
the code:<br>
<pre><code class="java hljs"><span class="hljs-keyword">private</span> List<PaymentRBS> rbsList;
<span class="hljs-keyword">private</span> List<PaymentPartner> partnerList;
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">compare</span><span class="hljs-params">()</span> </span>{
List<PaymentPartner> found = <span class="hljs-keyword">new</span> ArrayList<>();
<span class="hljs-keyword">for</span> (PaymentRBS rbs : rbsList) {
found = partnerList.stream()
.filter(paymentPartner ->
paymentPartner.getAccount().equals(rbs.getAccount()) && paymentPartner.getSum() == rbs.getSum())
.collect(Collectors.toList());
}
found.forEach(System.out::println);
}</code></pre>
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<div class="content__item-img large name-color-D"><span>D</span></div><span class="answer__name"><a href="#!">Dmitry Roo</a>, 2021-10-27 <br/> @student_1</span>
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<p class="answer__detail">I would do this: <br>
1. Make a map from both sheets, where the key is the number, accounts, and the value is the object itself. <br>
2. By this key, I would combine both maps into one, but the value would be <code class="hljs">Tupple2<PaymentRBS, PaymentPartner></code>. That. in one tapple there would be both objects with the same account number. <br>
3. According to the values in the final collection, it will be possible to perform all the operations of interest.</p>
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