remove duplicates from list java 8 code example
Example 1: java remove duplicates
import java.util.*;
public class RemoveDuplicatesFromArrayList {
public static void main(String[] args) {
List<Integer> numbers = Arrays.asList(1,2,2,2,3,5);
System.out.println(numbers);
Set<Integer> hashSet = new LinkedHashSet(numbers);
ArrayList<Integer> removedDuplicates = new ArrayList(hashSet);
System.out.println(removedDuplicates);
}
}
Example 2: java remove duplicates
public static <T> ArrayList<T> removeDuplicates(ArrayList<T> list){
Set<T> set = new LinkedHashSet<>(list);
return new ArrayList<T>(set);
}
Example 3: compare two lists and remove duplicates java
listA.removeAll(new HashSet(listB));
Example 4: remove duplicates from list java
ArrayList<Object> withDuplicateValues;
HashSet<Object> withUniqueValue = new HashSet<>(withDuplicateValues);
withDuplicateValues.clear();
withDuplicateValues.addAll(withUniqueValue);