Check out example codes for "java arraylist to string". It will help you in understanding the concepts better.

Code Example 1

ArrayList<String> al = new ArrayList<String>();
      al.add("Hello");
      al.add("Wor");
      al.add("ld");
      StringBuffer sb = new StringBuffer();
      
      for (String s : al) {
         sb.append(s);
         sb.append(" ");
      }
      String str = sb.toString();
      System.out.println(str);//"Hello wor ld"

Code Example 2

String[] arr = list.toArray(new String[list.size()]);

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