Question

I am having a String str = 12,12 I want to replace the ,(comma) with .(Dot) for decimal number calculation, Currently i am trying this :

 if( str.indexOf(",") != -1 )
 {
     str.replaceAll(",","\.");
 }

帮助

Answer 1

你的问题不是对应的/替代的,但努力是不可改变的,你需要分配结果:

str = str.replaceAll(",","."); // or "\.", it doesn t matter...

Answer 2

Just use replace und replace all (预计:regex):

str = str.replace(",", ".");

or

str = str.replace( , ,  . );

(replace) 输入:char/code>或CharSequence,该接口由String实施。



又注意到你应重新分配结果

Answer 3

str = str.replace( , ,  . )

.。

Answer 4

if(str.indexOf(",")!=-1) { str = str.replaceAll(",","."); }

甚至更好

str = str.replace( , ,  . );

Answer 5

Just use str.replace( , , , ) - it is both air and effective when a one nature is to be amended. 如果 com子确实存在,它就没有。

Answer 6

对于你提供的现有信息来说,用这一简单办法替代:

str.replaceAll(",", ".");

Answer 7

<>strong>in java src, You can Add a new tool such:

public static String remplaceVirguleParpoint(String chaine) {
       return chaine.replaceAll(",", "\.");
}

Answer 8

使用:

String str = " 12,12"
str = str.replaceAll("(\d+)\,(\d+)", "$1.$2");
System.out.println("str:"+str); //-> str:12.12

希望帮助你们。

Answer 9

如果你想要改变这个概念,是因为你来自欧洲,希望使用警棍,而不是用mas子阅读用扫描器读成的,那么你可以这样做:

Scanner sc = new Scanner(System.in);
sc.useLocale(Locale.US);
System.out.println(sc.locale().getDisplayCountry());