How to split a string before calling another constructor

wutzebaer :

I try to reuse my constructor like this:

    public final long x;
    public final long y;
    public final int level;
    private final int hash;
    public final Point tileCenter;

    public TileCoordinate(long x, long y, int level) {
        this.x = x;
        this.y = y;
        this.level = level;
        this.hash = Objects.hash(x, y, level);
        this.tileCenter = getTileCenter();
    }

    public TileCoordinate(String key) {
        String[] bits = key.split("-");
//      this.level = Integer.parseInt(bits[0]);
//      this.x = Long.parseLong(bits[1]);
//      this.y = Long.parseLong(bits[2]);
        this(Long.parseInt(bits[0]),Long.parseLong(bits[1]),Integer.parseLong(bits[2]));
        this.hash = Objects.hash(x, y, level);
        this.tileCenter = getTileCenter();
    }

Since I don't want to write this(Integer.parseInt(key.split("-")[0]),Long.parseLong(key.split("-")[1]),Long.parseLong(key.split("-")));, what are my options?

Karol Dowbecki :

The call to this() or super() must be the first statement in the constructor. One way to fix it would be to convert the second constructor into a Factory Method:

public static TileCoordinate parseTitleCoordinate(String key) {
  String[] bits = key.split("-");
  long x = Long.parseLong(bits[0]);
  long y = Long.parseLong(bits[1]);
  long level = Long.parseLong(bits[2]);
  return new TitleCoordinate(x, y, level);
}

This would allow to keep the fields final.