remove duplicate word from string

package practice;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

public class rough2
{
	public static void main(String args[]) 
	{	
		Scanner sc = new Scanner(System.in);
		
		String string = sc.nextLine();

        string = Arrays.stream(string.split("\\s+")).distinct().collect(Collectors.joining(" "));

        System.out.println(string);
	}
}