1. IntroductionIn this quick tutorial, we're going to learn how to clean up the duplicate elements from a List. First, we'll use plain Java, then Guava, and finally, a Java 8 Lambda-based solution. Show
This tutorial is part of the “Java – Back to Basic” series here on Baeldung. 1. Remove duplicate elements in arraylist using LinkedHashSetThe LinkedHashSet is the best approach for removing duplicate elements in an arraylist. LinkedHashSet does two things internally :
Java example to remove duplicates in arraylist using LinkedHashSet. In given example, numbersList is an arraylist containing integers and some of them are duplicate numbers e.g. 1, 3 and 5. We add the list to LinkedHashSet, and then get back the content back into the list. The result arraylist does not have duplicate integers. Program Output. [1, 1, 2, 3, 3, 3, 4, 5, 6, 6, 6, 7, 8] [1, 2, 3, 4, 5, 6, 7, 8]How to remove duplicates from ArrayList in Java?To remove dupliates from ArrayList, we can convert it into Set. Since Set doesn't contain duplicate elements, it will have only unique elements. Let's see an example to remove duplicates from ArrayList: Output: Before converting to set
[Mango, Banana, Mango, Apple]
After converting to set
[Mango, Banana, Apple]
Next TopicJava Collections Interview Questions ← prev next → OverviewJava Lists are not distinct collections and they can contain duplicates. In this quick tutorial we will learn to remove duplicate elements from a Java List. First, we will use Java Streams to deduplicate java list. Next, we will use a Set to remove duplicates. Remove Duplicates using Java StreamWe can use the distinct method of Streams to remove the duplicate elements from an ArrayList. List<Integer> list = List.of(2, 3, 4, 2, 4, 5, 6, 3);
List<Integer> output = list.stream()
.distinct()
.collect(Collectors.toList()); Code language: Java (java)First, we created an ArrayList with duplicate elements. Next, we created a stream of elements and called distinct method on the stream. Finally, we collect the elements into a new ArrayList. The the collected list is deduplicated and it looks like this. [2, 3, 4, 5, 6]Note that we are creating a new list here. Thus the original list with duplicate remains unchanged. “remove duplicates from a list of lists python” Code Answer’spython remove duplicates from list python by 41 python - remove duplicate items from the list python by Important Iguana on May 26 2020 Comment 8 remove duplicates from a list of lists python typescript by Glorious Giraffe on Aug 26 2020 Comment 2 Source: stackoverflow.com Add a Grepper Answer Python answers related to “remove duplicates from a list of lists python”
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“delete duplicate nested list in list java” Code Answerremove duplicates from list java java by Distinct Deer on May 17 2021 Comment 1 Add a Grepper Answer Java answers related to “delete duplicate nested list in list java”
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