我想改变“，”为“。”在priceString中

Question

在Android Studio中使用Android应用

但是在replaceAll上有一个弹出窗口，上面写着：“结果会被忽略”

 String priceString = mPriceEditText.getText().toString().trim();

if(priceString.contains(",")){
    priceString.replaceAll(",",".");
}

我该如何修复此代码？

Answer 1

字符串在Java中是不可变的，因此priceString.replaceAll(",",".")无法更改priceString。相反，它会返回您忽略的新字符串。

您需要将返回的字符串分配给某些内容，例如：

priceString = priceString.replaceAll(",",".");

Answer 2

只是priceString.replace(",",".")为我工作

Answer 3

try above code

String priceString = mPriceEditText.getText().toString().trim();
final String newPriceString;

  if(priceString.contains(",")){
      newPriceString = priceString.replaceAll(",",".");
  }