cannot convert from element type object to string

Question

ArrayList display = new ArrayList();
for (Player p : game.getAllPlayers())
  display.add(new StringBuilder().append(game.isPlayerActive(p) ? ChatColor.BLACK : ChatColor.GRAY).append(NameUtil.stylize(p.getName(), true, !game.isPlayerActive(p))).toString()); int no;
  int line;
  try {
    no = 2;
    line = 0;
    for (String s : display) {
      ((Sign)this.signs.get(no)).setLine(line, s);
      line++;
      if (line >= 4) {
        line = 0;
        no++;
      }
    }
  } catch (Exception e) {  }

  for (Sign s : this.signs)
    s.update();

Can someone Help me??. when i write "for (String s : display) {" it gives me a DISPLAY error

You are using raw type ArrayList while you should be using parameterized type. — Rohit Jain
– Rohit Jain, Commented Nov 15, 2013 at 16:17

RamonBoza · Accepted Answer · 2013-11-15 16:17:40Z

1

change

ArrayList display = new ArrayList();

to

ArrayList<String> display = new ArrayList<String>();

but as a best practice, left element must be an interface, so it is better to set:

List<String> display = new ArrayList<String>();

or, even better

Collection<String> display = new ArrayList<String>();

answered Nov 15, 2013 at 16:17

RamonBoza

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1 Comment

Zong Over a year ago

I disagree with "must be an interface" and your assumptions about OP's usage. If you only need it as a Collection, then of course you can declare as such, but what if he/she needs random access and ordering? Just declare it as whatever is appropriate.

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