Design an algorithm and write code to remove the duplicate characters in a string

RemoveDuplicates.java

import java.io.*;
import java.util.*;

public class RemoveDuplicates{

     public static void main(String []args){
        String s = "aabnsbsbsssbbsbsbs";
        
        char[] characters = s.toCharArray();
        Set<Character> newSet = new LinkedHashSet<Character>();
        
        for(char c: characters){
            newSet.add(c);
        }
        
        StringBuilder sb = new StringBuilder();
        for(Character charac: newSet){
            sb.append(charac);
        }
        
        String newString = sb.toString();
        
        System.out.println(newString);
        
     }
}