public class strings {
  public static void main(String[] args) {
    String str= new String("Hallo");    
    System.out.println(toStringBuilder(str));
    
    StringBuilder strB1= new StringBuilder("Tschüß");    
    System.out.println(toString(strB1));    
    
  }
  
  public static String toString(StringBuilder s) {    
   return s.toString();    
  }
  public static StringBuilder toStringBuilder(String s) {  
    StringBuilder sb= new StringBuilder();
    for(int i = 0;i<=s.length()-1;i++)
      sb.append(s.charAt(i));
    return sb;    
   }

}