There are following way to Remove duplicates from the LinkedList in java.

• First convert Arrays to list using Arrays.asList() method.
• Now create the LinkedList object and pass the list to here.
• Now get the Stream data from linkedlist using linkedlist.stream() method.
• After call the distinct() method to remove duplicates elements.
• Now call the Collectors.toList() to store all number inside list.
• print the number.

import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.stream.Collectors;

public class RemoveDuplicates {
	public static void main(String[] args) {
		List<Integer> list = Arrays.asList(1, 2, 3, 5, 6, 1, 2, 3);
		LinkedList<Integer> linkedlist = new LinkedList<Integer>(list);
		List<Integer> number = linkedlist.stream().distinct().collect(Collectors.toList());
		System.out.println("number list " + number);
	}
}

Output :-

number list :- [1, 2, 3, 5, 6]