/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		List<Integer> list= new LinkedList<>();
		list.add(5);
		list.add(2);
		list.add(5);
 
		reomveDuplicates(list);
	}
 
	public static void reomveDuplicates(List<Integer> list) {
		LinkedHashSet<Integer> setWithoutDuplicates = new LinkedHashSet<Integer>();
		for(Integer elem: list) {
			setWithoutDuplicates.add(elem);
		}
		list.clear();
 
		for(Integer elem: setWithoutDuplicates) {
			list.add(elem);
		}
	}
}

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