java 8 get duplicates in list
List<Integer> numbers = Arrays.asList(1, 2, 1, 3, 4, 4); Set<Integer> nbrRemovedSet = new HashSet<>(); // Set.add() returns false if the element was already in the set. Set<Integer> nbrSet = numbers .stream() .filter(n -> !nbrRemovedSet.add(n)) .collect(Collectors.toSet()); // also, we can use Collections.frequency: Set<Integer> nbrSet = numbers .stream() .filter(i -> Collections.frequency(numbers, i) >1) collect(Collectors.toSet());
find repeated elements in array java
for (String name : names) { if (set.add(name) == false) { // your duplicate element } }
java 8 get duplicates in list
List<Integer> numbers = Arrays.asList(1, 2, 1, 3, 4, 4); Set<Integer> nbrRemovedSet = new HashSet<>(); // Set.add() returns false if the element was already in the set. Set<Integer> nbrSet = numbers .stream() .filter(n -> !nbrRemovedSet.add(n)) .collect(Collectors.toSet()); // also, we can use Collections.frequency: Set<Integer> nbrSet = numbers .stream() .filter(i -> Collections.frequency(numbers, i) >1) collect(Collectors.toSet());
find repeated elements in array java
for (String name : names) { if (set.add(name) == false) { // your duplicate element } }
Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
