java - 通过堆叠 if 语句进行优化的可能性？

Question

private String formatPrice(int price) {
    String p = "";
    if (price > 10000000) {
        p = " (" + ((double) Math.round(price / 100000) / 10) + "m)";
    } else if (price > 100000) {
        p = " (" + (price / 1000) + "k)";
    } else if (price > 1000) {
        p = " (" + ((double) Math.round(price / 100) / 10) + "k)";
    } else if (price > 0) {
        p = " (" + price + "gp)";
    }
    return p;
}

是否可以简化这段代码而不过多降低性能？看起来做得不太好。

Answer 1

Is it possible to simplify this piece of code without slowing down performance too much?

如果我理解你的问题，是的!您可以将该方法设为静态。您还可以使用 String.format() 显着缩短它

private static String formatPrice(int price) {
  if (price < 0) {
    return "";
  }
  if (price > 1000 * 1000) {
    return String.format("(%.1fm)", ((double) price) / (1000 * 1000));
  } else if (price > 1000) {
    return String.format("(%dk)", price / 1000);
  }
  return String.format("(%dgp)", price);
}