2. UsingStream.distinct()to Remove Duplicate Elements and Get a New List We can use the Java 8Stream.distinct()method which returns a stream consisting of the distinct elements compared by the object’sequals()method. Finally, collect all district elements asListusingCollectors.toList(). Array...
Stream distinct() with custom objects Let’s look at a simple example of using distinct() to remove duplicate elements from alist. package com.journaldev.java; import java.util.ArrayList; import java.util.List; import java.util.stream.Collectors; public class JavaStreamDistinct { public static ...
Few simple examples to find or count the duplicates in stream and remove the duplicates from stream in Java 8. We will use ArrayList to provide stream of elements including duplicates. Few simple examples to find and count the duplicates in aStreamand remove those duplicates sinceJava 8. We w...
https://leetcode.com/problems/remove-duplicates-from-sorted-array/ 题目 Given a sorted array nums, remove the duplicates in-place such that each element appear only once and return the new length. Do not allocate extra space for another array, you must do this by modifying the i...
Approach 2 (Using Constant Extra space) For Remove Duplicate Elements From Array In this method, we won’t use any extra space; instead, we’ll just change the provided array so that the first k elements are the unique ones and the rest are duplicates. Then, we’ll return the value of...
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In the following example, we are using the distinct() method ofStream API. This method removes the duplicates from the input stream and returns a new stream after removing duplicate elements. importjava.util.ArrayList;importjava.util.Arrays;importjava.util.List;importjava.util.stream.Collectors;publ...
output.forEach(System.out::print);//prints://12456Code language:Java(java) When we create aLinkedHashSetinstance using theList, it removes all the duplicates from theListand maintains the order of the elements. We then used theLinkedHashSetinstance in theArrayListconstructor to build a newList...
In this tutorial, you will learn how to remove duplicates from ArrayList. Example 1: Removing duplicates from ArrayList using LinkedHashSet In the following example, we are removing the duplicate elements from ArrayList using LinkedHashSet. The steps fol