Java 8 remove duplicates from two lists

1. Introduction

In 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.

This tutorial is part of the “Java – Back to Basic” series here on Baeldung.

1. Overview

In this tutorial, We'll learn how to find the unique values from two lists and how to find all common or duplicates values from two lists.

We'll demonstrate using two ArrayList's to find out unique and duplicates objects in it.

To achieve our requirement, we must compare values in both list. Either we can run the loop through each list or we can use list api built in methods. We'll explore using built in api methods such as contains(), retailAll() and removeAll() methods.

Consider input two lists.

List 1:

List winterFruits = new ArrayList<>(); winterFruits.add("Clementine"); winterFruits.add("Plums"); winterFruits.add("Dates"); winterFruits.add("Grapefruit"); winterFruits.add("Kiwi");

List 2:

List summerFruits = new ArrayList<>(); summerFruits.add("Mango"); summerFruits.add("Plums"); summerFruits.add("Watermelon"); summerFruits.add("Papaya"); summerFruits.add("Grapefruit");

1. Remove duplicate elements in arraylist using LinkedHashSet

The LinkedHashSet is the best approach for removing duplicate elements in an arraylist. LinkedHashSet does two things internally :

• Remove duplicate elements
• Maintain the order of elements added to it

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.

import java.util.ArrayList; import java.util.Arrays; import java.util.LinkedHashSet; public class ArrayListExample { public static void main(String[] args) { // ArrayList with duplicate elements ArrayList<Integer> numbersList = new ArrayList<>(Arrays.asList(1, 1, 2, 3, 3, 3, 4, 5, 6, 6, 6, 7, 8)); System.out.println(numbersList); LinkedHashSet<Integer> hashSet = new LinkedHashSet<>(numbersList); ArrayList<Integer> listWithoutDuplicates = new ArrayList<>(hashSet); System.out.println(listWithoutDuplicates); } }

Program Output.

[1, 1, 2, 3, 3, 3, 4, 5, 6, 6, 6, 7, 8] [1, 2, 3, 4, 5, 6, 7, 8]

1. Stream.distinct() – To Remove Duplicates

1.1. Remove Duplicate Strings

The distinct() method returns a Stream consisting of the distinct elements of the given stream. The object equality is checked according to the object’s equals() method.

List<String> list = Arrays.asList("A", "B", "C", "D", "A", "B", "C"); // Get list without duplicates List<String> distinctItems = list.stream() .distinct() .collect(Collectors.toList()); // Let's verify distinct elements System.out.println(distinctItems);

Program output:

[1, 2, 3, 4, 5, 6, 7, 8]

1.2. Remove Duplicate Custom Objects

The same syntax can be used to remove the duplicate objects from List. To do so, we need to be very careful about the object’s equals() method, because it will decide if an object is duplicate or unique.

Consider the below example where two Person instances are considered equal if both have the same id value.

public class Person { public Person(Integer id, String fname, String lname) { super(); this.id = id; this.fname = fname; this.lname = lname; } private Integer id; private String fname; private String lname; //Getters and Setters are hidden for brevity @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; Person other = (Person) obj; return Objects.equals(id, other.id); } @Override public String toString() { return "Person [id=" + id + ", fname=" + fname + ", lname=" + lname + "]"; } }

Let us see an example of how we can remove duplicate Person objects from a List.

//Add some random persons Collection<Person> list = Arrays.asList(p1, p2, p3, p4, p5, p6); // Get distinct people by id List<Person> distinctElements = list.stream() .distinct() .collect( Collectors.toList() );

To find all unique objects using a different equality condition, we can take the help of the following distinctByKey() method. For example, we are finding all unique objects by Person’s full name.

//Add some random persons List<Person> list = Arrays.asList(p1, p2, p3, p4, p5, p6); // Get distinct people by full name List<Person> distinctPeople = list.stream() .filter( distinctByKey(p -> p.getFname() + " " + p.getLname()) ) .collect( Collectors.toList() ); //********The distinctByKey() method need to be created********** public static <T> Predicate<T> distinctByKey(Function<? super T, Object> keyExtractor) { Map<Object, Boolean> map = new ConcurrentHashMap<>(); return t -> map.putIfAbsent(keyExtractor.apply(t), Boolean.TRUE) == null; }

“compare two lists and remove duplicates java” Code Answer

compare two lists and remove duplicates java

typescript by Fragile Falcon on Feb 21 2020 Comment

0

Source: stackoverflow.com

Add a Grepper Answer

TypeScript answers related to “compare two lists and remove duplicates java”

• remove duplicates from a list of lists python

TypeScript queries related to “compare two lists and remove duplicates java”

• compare two lists and remove duplicates java
• remove duplicates from list java
• how to remove duplicates from list in java
• remove repeated elements in list java
• remove duplicated items list java
• list remove duplicate in java
• combine two lists and remove duplicates java
• does list allow duplicates in java
• compare two list and remove duplicates in java 8
• delete duplicate elements in two arrays in java
• java filter duplicates between lists
• remove duplicate from list by value java
• how to remove duplicate elemetn dfrom the list in java
• compare 2 list and remove duplicates
• how to remove duplicates in list in java
• list string remove duplicates java
• list filter duplicates java
• java union list without duplicates
• java list remove if duplicates
• remove duplicates from unsorted array list java
• java list no duplicate
• remove duplicates list java
• removing duplicate from sorted list java
• how to remove duplicated element from list java
• remove duplicate values from a list in java
• remove duplicates from list in java
• remove duplicated elements from list java
• how to filter out duplicate values in a list java
• how to remove duplicate in list java
• how to compare two arrays in java
• remove duplicates of list java
• java no duplicate list
• remove duplicates in list using java 8
• remove duplicate entry from list in java

• java remove duplicates from list
• list without duplicates java
• remove dublicates from list of lists java
• list remove duplicates java
• remove duplicates from two list java
• remove duplicate elements from list in java
• non duplicate list java
• remove redundant elements from list java
• a list with no duplicates java
• remove duplicate elements from two arrays java
• how to remove duplicate arrays from a list of arrays java
• how to compare two chars in javascript
• remove duplicate items from list java
• 82. remove duplicates from sorted list ii java
• compare two arraylist and remove duplicates in java
• java list without repeated elements
• merge two lists and remove duplicates java
• java 8 merge two lists and remove duplicates
• java 8 remove duplicates from list comparator
• java remove duplicates from integer list
• java compare two arrays and remove duplicates
• remove duplicate from list java
• how to remove duplicate elements from list in java
• how to remove duplicates from array list java
• remove duplicate value in list in java
• how to remove duplicates from array list in java
• how to remove duplicate elements from two arrays in java
• how to combined three list and remove duplicates in java 8
• combine two custom lists and remove duplicates java 8
• remove duplicates from list java 8
• how to remove duplicate list string in java
• remove duplicate values in array list java
• how to remove duplicates in a list java

• java list remove duplicates
• java list without duplicates
• remove duplicates in list java
• java list no duplicates
• how to remove duplicates from a list in java
• remove duplicates from nested list java
• remove duplicate object from list java
• compare two list obect and remove duplicates in java 8
• java remove difference between two lists
• check duplicates in list and remove java
• java remove duplicates from two lists
• remove duplicates in array list java
• how to remove repeated elements in a list java
• java list string remove duplicates
• how to remove duplicates from array in java without using collections
• java 8 list remove duplicate
• compare two list and remove duplicates online
• java merge two lists and remove duplicates
• java 8 list remove duplicate mergefunction
• how to remove duplicates from three different lists? java 8
• remove duplicates java list
• remove duplicates from list string java
• remove consective duplicate element from list java 8
• java remove duplicates from list java
• how to remove the duplicates from the list in java
• find duplicates in two lists java
• compare three list and remove duplicates in java 8
• how to clear duplicates from array list java
• java 8 list eliminate duplicates
• how to remove string list duplicates java
• java list without duplicate
• remove duplicates of a list java
• no duplicates list java

“java 8 list eliminate duplicates” Code Answer’s

java remove duplicates

java by Shy Snail on Jun 12 2020 Comment

5

Source: devqa.io

compare two lists and remove duplicates java

typescript by Fragile Falcon on Feb 21 2020 Comment

0

Source: stackoverflow.com

Add a Grepper Answer

Java answers related to “java 8 list eliminate duplicates”

• java 8 retrieve all list from object into single list and ignore duplicates
• java remove duplicates
• remove duplicates from sorted array
• how to remove duplicate elements from char array in java
• remove duplicates from arraylist in android

• remove duplicates from list
• remove duplicates from list java
• java program to remove duplicate words in a string
• String remove duplicate in java
• array remove duplicate in java

• String remove duplicate method in java
• remove duplicate string collection in java
• does set automatically get rid of duplicates in java
• java remove duplicates from list by property

Java queries related to “java 8 list eliminate duplicates”

• remove duplicates from array java
• java list remove duplicates
• remove duplicates in list java
• how are duplicates removed from a given array in java?
• remove duplicates in array java
• remove duplicates from sorted array java
• how to remove duplicate elements from array in java
• remove duplicates list java
• remove duplicate elements in array in java
• get distinct data from list java
• remove duplicates function in java
• remove duplicate elements in an array in java
• remove duplicates from list java 8
• how to remove duplicates in a list java
• filter duplicates java
• list without duplicates java
• java remove all duplicates from arraylist
• how to remove duplicates in java
• remove duplicates from array in java using for loop
• delete duplicate values in arraylist android
• how to remove duplicates in array in java
• arraylist remove duplicates java
• remove duplicates from string java
• remove duplicate words from string java
• remove dublicates from list of lists java
• how to remove duplicates in array java
• remove duplicates from string array java
• how are duplicates removed from a given array in java
• java how to remove duplicates from array
• remove duplicates from list string java
• remove duplicated array java
• how to make arraylist only remove one thing and leave the duplicates
• removing duplicates from arraylist in java
• java arraylist remove duplicates
• remove duplicate string collection in java
• how to remove duplicate from array in java
• remove duplicate array in java
• eliminate duplicates list java
• how to make sure there are no duplicatesin arraylist and sorted
• remove string duplicates java
• remove duplicate characters in a string java
• remove duplicates in list jaa
• write a program to remove elements from an array list in one iteration. also try removing duplicates
• remove duplicate elements from unsorted array in java
• remove duplicates in java from string
• remove duplicates array java
• java program to remove duplicate elements from an array
• remove duplicates from sorted array in java
• how to remove duplicates from array in java using loop
• java list string remove duplicates
• remove duplicates from int array in java
• how to use bubble sort to remove duplicates from an array in java
• remove duplicate from array java
• how to remove duplicate in array java
• remove duplicates of a list java
• java delete duplicates in list
• java list no duplicates
• remove duplicates from sorted array solution in java
• remove duplicate elements from arraylist
• how to remove duplicates from a list in java
• remove duplicate arraylist from array of arraylist java
• remove duplicates java list
• combine two lists and remove duplicates java
• how to remove duplicates in a arraylist
• java 8 arraylist of integer remove duplicates
• remove duplicates from java list
• java list duplicate
• from array list remove duplicat string java
• java arraylist delete duplicates
• remove all duplicate value from list in java
• create new array remove duplicates java
• best way to remove duplicates from an array java explanation
• java stream to remove duplicates
• remove duplicate number java
• remove duplicate enteries from array java
• how to remove repeated values in string java
• best way to remove duplicates from an array java
• duplicate remove in java
• java remove dulpicate
• java code to remove duplicates from string
• removing duplicates from java array primitive
• remove duplicate elements from string array in java
• remove duplicates using stream java
• removing duplicates from array java
• java two arrays remove dublicates
• android java remove duplicates
• remove duplicated in lists java
• java int array remove duplicates
• how to eliminate duplicate in array java
• how to remove duplicate words in java
• delete repeated elements in array java
• java stream remove duplicates
• write a java program to remove duplicate values in a static array.
• remove duplicates in string array java
• how to remove duplicate in array in java
• java stream remove duplicates with specific
• remove duplicates more than 2 java
• delete duplicates string java
• how do i remove duplicate words from a list in java
• write program to remove duplicate in an array java
• remove duplicates from unsorted array in place java
• compare 2 list and remove duplicates
• remove duplicate value in list in java
• remove consective duplicate element from list java 8
• remove duplicated elements from list java
• how to remove duplicate elements from two arrays in java
• remove duplicate values in array list java
• how to remove duplicate elemetn dfrom the list in java
• how to remove duplicate node in java
• get rid of duplicates in java
• remove duplicates while sorting java
• how to remove duplicates from string in java 8
• how to compare two chars in javascript
• java remove duplicates from integer list
• remove duplicate object from list java
• delete duplicate elements in two arrays in java
• java 8 remove duplicates from list comparator
• java 8 merge two lists and remove duplicates
• merge two lists and remove duplicates java
• compare two list and remove duplicates in java 8
• how to remove duplicate in list java
• compare three list and remove duplicates in java 8
• java remove duplicates from two lists
• java filter duplicates between lists
• remove redundant elements from list java
• how to remove duplicates using only one for loop in java
• how to remove duplicates in an array java
• how to remove duplicate value in array java
• how to delete duplicate element from array in java
• remove duplicate from sorted array java
• int[] sort java and remove duplicates
• how to remove repeated elements in a list java
• java stream eliminate duplicates
• delete duplicates java
• java get rid of dupolicates
• remove duplicate items from list java
• how to remove duplicates from list in java 8
• write a java program to remove the duplicate elements
• sort array and remove duplicates java
• remove duplicate elements in an array in java using class
• remove duplicate string in java
• remove duplicate from unsorted array java
• remove repeated number java manually
• java remove duplicates in list
• remove duplicate lines java
• how to remove duplicates in array using java
• java remove array duplicates
• how to remove duplicate elements in array in java
• java remove duplicates and preserve order
• how to remove duplicates occurrences in java array
• remove duplicates in javas
• how to remove duplicates in a arraylist java
• remove duplicates in an arraylist java
• will arraylist .remove remove the duplicate elements
• finding duplicates java
• duplicates in list java
• how to remove duplicate data from list in java
• methods to remove duplcated values in arraylist
• remove duplicates from arraliits
• arraylist duplicates
• how to find duplicates from an arraylist
• how to remove duplicate strings from a list in java
• java+remove duplicates from a list
• java array eliminate duplicates
• remove duplicate value from string in java
• how to remove all duplicates from a given string in java
• remove duplicates and sort array java
• how to get al the duplicate values of an arraylist
• arraylist eliminate equal strings
• remove the duplicates from the list in java
• set java duplicates
• arraylist no duplicate
• java arraylist with no duplicates
• how to remove duplicate value in arraylist in java
• remove duplicates from a sorted arraylist
• list duplicate in java
• how to remove duplicate elements from a list in java
• java list remove duplicate
• how to remove duplicate values in list in java
• how to remove duplicate values fronm list
• list java functions duplicate
• java remove duplicates from string list
• remove duplicates java arraylist
• java get not duplicate elements of arraylist
• removing duplicates java list
• java arraylist duplicates remove
• repetirion of item in arraylist java
• erase duplicate from arraylist java
• declaring an arraylist of a class that contain duplicate elements in java
• java list delete duplicates
• remove duplicate in java
• remove both duplicates in list java
• algorithim to duplicate arraylist java
• java arraylist duplicate elements
• java fill list with no duplicates
• avoid duplicates in arraylist java
• how to remove duplicates from list java
• remove duplicates in java list
• java remove duplicate array element
• remove duplicate values string function in java
• how to remove duplicate code in java
• java remove duplicates more than double
• how to delete duplicates in java calling method
• remove duplicates from stack java
• remove duplicate from array in java
• remove duplicates from array java in place
• does array sort remove duplicates java
• how to remove duplicate values from array in java
• remove duplicate elementes from array java
• removing duplicate element from unsorted array in java
• remove duplicates from the list java
• list method to delete duplicates java
• remove duplicate java easy
• how to remove dupllicates from an array in ajva
• remove duplicates from a string in java
• remove duplicate words in java
• sort in java while removing duplicates
• remove duplicates from list<string> java
• removing duplicate words java
• eliminate duplicate elements from array in java
• remove duplicates number java program
• java remove duplicates from collection
• how to remove list duplicates java
• remove repeated values from array java
• remove list duplicates java 8
• remove duplicates from sorted arrayjava
• remove duplicates in aray in java
• java remove duplicates from unsorted array
• remove duplicates from a sorted array java
• remove duplciate java
• remove duplicates from ilst java
• remove duplicate values in java array
• removing duplicate values from array in java
• remove duplicates from array in java without using inbuilt function
• java delete duplicate list
• remove duplicate elements in unsorted array in java
• java two list remove duplicates
• remove duplicate names from array java
• remove all duplicates from list java
• remove duplicates from array using java
• remove duplicate from sorted array java
• remove duplicate java
• java remove duplicates from string
• remove duplicates from array string java

• remove duplicates from list java
• remove duplicate elements from array in java
• java remove duplicates from array
• list remove duplicates java
• remove duplicates java
• arraylist remove duplicates android
• remove duplicates from string list java
• remove duplicates from string java without using collections
• how to remove duplicates from deque in java
• how to remove duplicate in arraylist and add in another
• remove duplicates from unsorted array java
• java remove duplicates from list algorithm
• java remove duplicates from arraylist of objects
• remove duplicate element in an array in java
• remove duplicates in java
• java list without duplicates
• remove duplicates from string in java
• remove duplicates from arraylist in java
• how to remove duplicates in arraylist of objects in java
• remove duplicate java
• remove duplicate from list java
• java remove duplicates from arraylist of objects
• how to remove duplicate elements from array in java android
• remove duplicates from an array java
• how to remove repeated elements in an array in java
• java remove duplicates from arraylist
• printing non duplicate items in arraylist java
• how to remove repreating elemetns in a array list in java
• java 8 remove duplicates from list
• java list without duplicate
• how to remove duplicates in arraylist in java
• how to remove a duplicate value from an array java
• how to remove duplicates in list in java
• remove duplicates of arraylist
• remove duplicates number from array java
• string remove duplicate in java
• 82. remove duplicates from sorted list ii java
• how to delete duplicate number in array in java
• string remove duplicate method in java
• java remove duplicate elements in an array
• remove the duplicates from the array in java
• remove duplicates from lists java
• how to remove dublicates in the array java
• java 8 list eliminate duplicates
• how to remove duplicates from array in java without using collections
• write a program to remove duplicates from array in java
• how to remove string list duplicates java
• how to get rid of duplicates in an array java
• how to remove duplicate elements from list in java
• java remove duplicates from list java
• how to remove duplicate number from array in java
• remove duplicates from java array
• remove duplicates java array
• remove duplicate data in java
• remove duplicates from array using for loop in java
• . write the following method that returns a new arraylist. the new list contains the non-duplicate elements from the original list. also, write a test program to test this method. public static <e> arraylist<e> removeduplicates(arraylist<e> list)
• remove duplicate elements in an array java
• massiv remove duuplicate element in java
• how to remove duplicate string from arraylist in java
• list remove duplicate in java
• remove duplicates from two list java
• how to remove duplicates in bst in java
• how to remove duplicates from arraylist in java
• remove duplicates from unsorted array? - java
• java delete duplicates from list
• remove duplicates method java
• delete duplicates from array java
• java 11 remove duplicates from list
• java how to remove duplicates from list
• array remove duplicates java
• how to remove repeated values in array java
• java program remove duplicates from array
• stream java remove duplicates
• removing duplicate in java
• how to remove duplicate elements from sorted array in java
• how to remove duplicacy in java
• delete all duplicate elements java android
• remove duplicate value from array in java
• array remove repeated data java
• how set avoid duplicates in java
• remove duplicate elements in array java
• removing duplicates from java array
• how to get rid of duplicates in java
• how to remove repeated values from array java
• java collections sort remove duplicates
• eliminate duplicates java array
• remove repeated elements in array java data type long
• remove duplicates from list java string
• remove duplicates library from array in java
• remove duplicates from sorted list in java
• comparator java remove duplicate
• remove duplicate substr in java
• delete all the duplicates java strng
• eliminate duplicates in java
• remove duplicates string java
• remove duplicates method in java
• remove duplicates with most 2 java
• how to remove duplicate string in java
• i want to remove specific duplicates from array java
• removing consecutive duplicates java
• remove duplicates from string in java without string method
• java program for remove duplicates from array
• remove duplicate values from a list in java
• java list no duplicate
• how to remove duplicates from array list in java
• no duplicates list java
• java no duplicate list
• how to filter out duplicate values in a list java
• remove duplicates in an array with command line java
• java remove duplicates from array easy
• find duplicates in two lists java
• remove duplicates from a list java 8
• how to compare two arrays in java
• how can we remove duplicate no in array java
• non duplicate list java
• remove duplicates in array list java
• compare two list obect and remove duplicates in java 8
• java union list without duplicates
• java list without repeated elements
• combine two custom lists and remove duplicates java 8
• how to clear duplicates from array list java
• how to remove duplicates from three different lists? java 8
• a list with no duplicates java
• check duplicates in list and remove java
• java remove difference between two lists
• java program to remove duplicate values from string
• list duplicate remover java
• how to delete all duplicates in from an array java
• java remove duplicate from array
• eliminate duplicates from list java
• list filter duplicates java
• java delete duplicates from array
• how to remove duplicate number in array java
• if duplicate element delete java
• java collection to remove duplicates
• remove duplicated in java
• howt to remove duplicates array java
• how to use set to remove duplicates in java
• removing duplicate elements from array java
• write a java program to remove duplicate from an array
• java util list remove duplicates
• 26. remove duplicates from sorted array java
• remove all duplicates in an array java
• 39. to remove duplicates in a an array java
• how to remove duplicate values in an array java
• collection java remove duplicates
• java remove duplicates in set
• java program to remove duplicates from integer array
• java removeif duplicate
• sort method in java remove duplicates
• remove duplicate records from arraylist in java
• how to remove duplicates from an array list java
• remove object from list on the basis of buplicate name in java
• arraylist.remove() with duplicates java
• duplicating elements in an arraylist java
• java remove duplictes
• remove duplicaets using a jav list
• remove duplicates in a string java
• remove duplicate values from list java
• how to remove duplicate from a list in java
• remove duplicates in list in java
• remove duplicate from array list using collection class
• remove duplicates from string sorted java
• remove duplicates from string java 8
• how to remove duplicates in java bag
• java list stram duplicate remove
• remove duplicates from array? - java
• how can we remove duplicates from two string using collection java
• java 8 remove duplicates from string list
• java arraylist without duplicates
• remove duplicate characters in a string java in java
• java remove duplicate list values
• remove duplicate objects from array java
• remove all duplicates from the string
• removing duplicates from arraylist of arraylist in java
• how to make arraylist.remove() removes one value from the duplicates
• java remove arraylist duplicates
• java remove duplicates from list of file
• how to remove duplicate items from list in android
• java arraylist duplicates
• add objects into collection without duplicates
• dedupe list java
• how to remove duplicates in arraylist
• arraylist unique elements java programs
• how to remove duplicates in a list in java
• duplicate arraylist in java
• java arraylist duplicate entries
• remove repeated values in list java
• how to remove duplicate values from an arraylist in java
• get duplicates in arraylist java
• how to remove duplicate integer values in list java
• algorithm for removing duplicates from arraylist
• remove fuplicates from java list
• how to remove duplicates in object arraylist java
• how to delete repeated element in list in java
• how to delete duplicates from list in java
• remove duplicates using sum method java
• remove the duplicate elements in sorted array java
• remove the dublicate java
• java solution for removing duplicates from integer array:
• remove all duplicate elements in array java
• how to remove duplicate elements in a collection java
• remove duplicate value list java
• remove duplicates from array list in java
• how to remove non repeated elements in an array in java
• remove duplicates from array java inbuilt function
• removing duplicate words from string in java
• remove duplicate number in array java
• how to remove duplicates arrays in java
• removing duplicates from list in java
• remove duplicate number from string java
• java algorithm remove duplicates from array
• java remove duplicated numbers from beginning
• java remove duplicate values from array
• remove duplicates program in java
• java 8 eliminate list duplicates
• java progrma to remove duplicates from ana rray
• collection remove duplicates java
• remove duplicate values array java
• eliminate duplicate elements from string in java
• java function to remove duplicates in array
• how to remove repeated numbers in array java
• remove duplicate element in array java
• how to remove duplicate params in java
• how to remove duplicate strings in java
• removing duplicate string in java
• how to remove duplicate data in javaa
• how to eliminate duplicates in java
• how to remove duplicate numbers in java
• how to remove dublicate from array java
• remove duplicates from 2 arrays java
• java array dulicate remove
• java remove duplicate words from array
• how to remove duplicates in string array java
• java remove all duplicate values from array
• remove duplicate code in java
• how to eliminate duplicates in list java
• remove duplicate words from array java
• java function to remove repeated values
• delete string [] duplicates java
• remove duplicates from string array in java
• remove duplicates from sets java
• java remove duplicate words from string
• how to remove repeated values i array java

• java remove duplicates from list
• compare two lists and remove duplicates java
• removing duplicates from array in java
• remove duplicates from arraylist
• java remove duplicates
• arraylist remove duplicates
• remove duplicates from array in java
• remove duplicate in array java
• how to remove duplicates from array in java
• remove duplicate elements from array java
• write a program to remove duplicates from array in java?
• java remove duplicate from list
• remove duplicates from int array java
• java array remove duplicates
• remove the duplicate elements in array in java
• how to remove duplicates from an array in java
• how to remove duplicates from list in java
• remove duplicate in java
• java arraylist remove duplicate
• remove duplicate values in array java
• remove duplicate words from string in java
• remove duplicates arraylist java
• how to remove duplicate in arraylist
• how to delete duplicate value from list in android
• check duplicates and remove in arraylist java
• remove duplicates from string array java without using collections
• java program to remove duplicates from array
• java input arraylist delete duplicates
• remove duplicates from list in java
• how to remove duplicate elements of an array in java
• remove duplicate number from array java
• how to read a list and remove duplicates in java
• remove repeated elements in list java
• remove dublicates from array java
• remove duplicate in arraylist java
• collection java remove duplicates and sorted array
• arraylist dublicates
• array remove duplicate in java
• remove duplicates in array in java
• remove duplicates in arraylist java
• how to remove duplicates in an array in java
• java remove duplicates from sorted array
• java removing duplicates from an array
• java program to remove duplicate element in an array
• remove duplicates from primitive array java
• list string remove duplicates java
• how to delete duplicates in array java
• how to eliminate the elements that duplicate in java
• java array duplicate remove
• add item repeat to set list java
• remove duplicates from arraylist java
• remove duplicates of list java
• array duplicate remove in java
• java list of strings remove duplicates
• java program to remove duplicate elements in an array
• remove duplicates from stringjava
• remove duplicates in an array java
• remove duplicated items list java
• how to remove duplicate element from arraylist using java8
• remove duplicate elements from list in java
• remove duplicate values in list java
• remove duplicates from nested list java
• how to remove duplicates in an arraylist
• java remove all duplicates from list
• how to make arraylist.remove() remove one value from the duplicates
• how to remove duplicate value from arraylist in java
• delete duplicates in list java
• arraylist delete duplicates java
• how to remove duplicates in a string java
• removing duplicate element from array in java
• how to remove all duplicates from an int array java
• how to remove duplicates from the list java
• removing duplicates from string in java
• remove duplicate entries in a list java
• function to remove duplicates in java
• java string remove duplicates
• write a method to remove duplicate elements from an array in kava
• remove duplicaes java array
• remove duplicate elements from array jafva
• how to remove duplicates in list in java 8
• remove duplicates from array with occurrences java
• remove only consecutive duplicates java
• remove duplicates from a list java
• remove duplicates in set java
• filter duplicates java [] int
• method to remove duplicates in a list java
• program to remove duplicates from an array in java
• how to remove duplicates in boolean java
• remove the duplicate elements in array java
• how to remove duplicate in an array java
• java remove duplicates form list
• how to remove duplicates space in string java
• list java remove duplicate
• java remove duplicates froma line
• how to remove duplicates based on equals method java
• java array remove duplicate elements
• java remove repeated elements array
• how to delete duplicates in java
• how to remove duplicate element from array in java
• remove duplicates later in java
• what will be the best approach to remove the duplicate from a string in java
• java compare two arrays and remove duplicates
• how to remove duplicates from array list java
• removing duplicate from sorted list java
• how to remove duplicated element from list java
• remove duplicates in list using java 8
• how to remove the duplicates from the list in java
• remove duplicates in the array in java
• primitive way of removing duplicates from java array
• java streams remove duplicates
• how to remove duplicates in java array
• how to delete repeated elements in array in java
• how to remove duplicate list string in java
• java 8 list remove duplicate mergefunction
• remove duplicate from list by value java
• java 8 list remove duplicate
• java merge two lists and remove duplicates
• compare two list and remove duplicates online
• does list allow duplicates in java
• remove duplicates from unsorted array list java
• how to combined three list and remove duplicates in java 8
• java list remove if duplicates
• how to remove duplicate arrays from a list of arrays java
• remove duplicate elements from two arrays java
• how can we remove duplicate number in array simple java
• how are duplicates removed from an array without using any library in java
• java remove duplicated from list
• if 2 data duplicates then delete 1 java
• remove duplicates from array java explained
• list of long remove duplicates java
• how to remove duplicates in map in java
• java remove duplicates list
• remove duplicate entries from a list java
• arrays remove duplicates java
• remove duplicate item from array java
• remove duplicates from string in java
• list of string remove duplicates best java
• remove duplicates fron string java
• how remove duplicate values in java
• remove dublicate array java
• remove duplicate keep first occurence java
• remove repeated number java
• remove duplicate value of a list java
• compare two arraylist and remove duplicates in java
• remove duplicates function java
• method used to remove duplicate in java
• remove array duplicates java
• removing duplicates java
• java removeif duplicate foreach
• remove duplicates from array java using loop
• remove duplicate strings in a list java
• removeduplicates method in java
• remove duplicate data from list in java
• how to remove from arraylist when there same values
• java remove duplicate strings from arraylist
• java program to remove duplicates from email list in java
• get unique values from stringlist java
• remove duplicates from email list in java
• remove duplicates from arraylist using one list
• remove duplicate from array list
• remove duplicate data from arraylist in java
• remove duplicate element from array java
• remove duplicate elements from an array in java
• remove repeated elements in an array java
• how to remove duplicates from array java
• java remove all duplicates from string
• eliminate duplicates in array java
• how to remove duplicates from an arraylist
• delete duplicates in a list java
• drop duplicate in arraylist
• how to remove arraylist duplicates
• dumplicates arraylist elements
• remove duplicates items from list in android
• how to remove duplicate elements in arraylist
• how to avoid duplicates in list java
• removeduplicates java
• java code to remove duplicates from list
• arraylist of type string in java how to remove duplicates
• remove duplicate values from array list android
• how to remove duplicate elements from the list in java
• arraylist remove duplicate elements
• how to eliminate duplicates in a list in java
• how to remove duplicates in the arraylist
• how to remove duplicate values from arraylist without use distinct function in java
• clear duplicates arraylist
• removing duplicate from an array using collections
• how to remove repeated elements in an arraylist in java
• remove repeated elements in arraylist java
• method which removes duplicates java
• what are the two ways to remove duplicates from arraylist?
• remove same arraylist from list of arraylist java
• how delete same integer inside list java
• android how to remove the redundant entries from arraylist
• algorithms to remove duplicates from object array java
• how to delete duplicate elements in list java
• how to delete duplicates from arraylist in java
• removing duplicates in an array in java
• remove dublicate in java
• remove duplicate value from array java
• java remove duplicates from string array
• java remove duplicates but only keep double
• remove all duplicate elements array java
• java list eliminate duplicates
• how to remove duplicate elements from the array in java
• remove duplicates int array java
• remove duplicate code definition java
• removing duplicates from an array java
• how to delete duplicates using set in java
• compare 2 arrays and remove duplicates java
• how to remove duplicate data in java
• how to remove duplicate elements from the array in java?
• java program to remove duplicate numbers in an array
• remove duplicates string from array java
• remove duplicated from array in java
• eliminate duplicates from list java 8
• best way to remove duplicates from a list in java
• how to remove duplicates from list in java without using inbuilt function
• remove duplicate in array in java
• remove duplicates elements from list java
• array remove duplicates from array java
• remove repeated elements in array java
• how to remove duplicates in string in java
• how to remove duplicate elements in java
• remove duplicate and sort elements from array in java
• remove duplicates in an array injva
• how to remove duplicates values in an array in java
• java code to remove duplicate elements in an array
• java collection remove duplicates
• remove duplicates that already in a string java
• how to remove duplicate elements java
• remove duplicates from two arrays java
• remove a duplicates from array in java
• remove all duplicate from list java
• java stream java remove duplicates
• java remove duplicate number values from array
• remove duplicates word from string java
• unsorted array remove duplicates in java
• java remove duplicated values in list
• how to remove duplicate words in a sentence using java
• remove duplicate in an array java
• remove repeated elements in string java
• java remove duplicate from int[]
• how to remove duplicate number in java
• remove duplicate entry from list in java

Join Two List In Java & Remove Duplicates

By admin | October 27, 2013 | Updated : April 28, 2016 java, list, No Comments

Join Two List In Java & Remove Duplicates explains about how to merge two lists into a single list and removing duplicate entries using java api.

We have some situation where we need to join two or more Lists (ArrayList,LinkedList etc) into a single List.

There are lot of different ways, we can do this

In this post, we show 2 different examples to join two lists in Java.

1) List.addAll() method of java.util.Collection class
2) Apache Common ListUtils.union()
3) Join two List & Remove Duplicates

Required Libraries

You need to download

1. Apache Commons Collections 3.2