how to return filled array item in user defined class toString method?

Question

the method should return all filled items from the array but instead, it returns the last item from the array.

public String toString() {

String result = "";

      for( int i = 0; i < list.length; i++ )
      {
         result =  String.format("%d. %s\n", i+1, list[i]);  
      }
      return result; 
   }

replace `=` by `+=` maybe! – Youcef LAIDANI Dec 10 '19 at 18:02 — Youcef LAIDANI, Dec 10 '19 at 18:02

score 0 · Accepted Answer · answered Dec 10 '19 at 18:01

Because you are always replacing the value in result string with latest

result =  String.format("%d. %s\n", i+1, list[i]);  // replaces the value always with latest

So use use StringBuilder to append all values and then return it

public String toString() {

 StringBuilder builder = new StringBuilder();

  for( int i = 0; i < list.length; i++ )
  {
     builder.append(String.format("%d. %s\n", i+1, list[i]));  
  }
  return builder.toString(); 
}

how to return filled array item in user defined class toString method?

1 Answers1