java traditional method to remove duplicate String

I just saw a post in dev someone solved same problem using collections in java. so i thought let me try the same problem to solve in traditional way`

1. public class Main
   {
   public static void main(String[] args) {
   String s="abbvcddgtttt";
   char c[]=s.toCharArray();
   char cc[]=new char[c.length];
   int index=0;
   char same=' ';
   for(int i=0;i<c.length;i++)
   {
   for(int j=i+1;j<c.length;j++)
   {
   if(c[i]==c[j])
   {
   c[i]=' ';
   }
   }
   if(c[i]!=' ')
   {
   cc[index]=c[i];
   index++;
   }

   }
   for(char i:cc)
   {
   

   System.out.println(i);
   }
   }
   }