我正在制作一个从用户那里获取双倍价值的Android Java程序。如果我在计算机上运行该程序,它可以很好地工作,因为我的计算机的区域设置EN_UK。但是当我在带有FI_FI语言环境的手机上运行时,它将无法正常工作。我知道原因:在英国人使用点作为十进制分隔符,但在芬兰这里的十进制分隔符是逗号。
DecimanFormat df = new DecimalFormat("#.#");
Double returnValue = Double.valueOf(df.format(doublenumber));
当我使用逗号时,它会显示java.lang.NumberFormatException: Invalid double: "1234,5"
。
如何让它们兼具逗号和点?
答案 0 :(得分:32)
使用DecimalFormat的其他构造函数之一:
new DecimalFormat("#.#", new DecimalFormatSymbols(Locale.US))
然后尝试使用两个分隔符解析它。
答案 1 :(得分:4)
使用DecimalFormatSymbols.getInstance()
将生成默认语言环境的正确符号,因此您可以在运行的任何平台上使用它。
DecimalFormat df = new DecimalFormat("#.#", DecimalFormatSymbols.getInstance());
答案 2 :(得分:2)
这应该适用于Java(已测试)以及android:)
班级名称:In18Helper.java
package com.akmeher.app.utils;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;
public class In18Helper {
private final static In18Helper mHelper = new In18Helper();
public static final In18Helper getInstance() {
return mHelper;
}
public double getDouble(String sValue, Locale locale) {
NumberFormat numberFormat = NumberFormat.getInstance(locale);
Number parse = null;
try {
parse = numberFormat.parse(sValue);
} catch (ParseException e) {
e.printStackTrace();
}
return parse == null ? 0 : parse.doubleValue();
}
}
班级名称:Application.java
package com.akmeher.app;
import java.util.Locale;
import com.akmeher.app.utils.In18Helper;
public class Application {
static DataModel[] testData = new DataModel[] {
new DataModel("1.034567", Locale.ENGLISH),
new DataModel("1,0345.67", Locale.ENGLISH),
new DataModel("1.0345,67", Locale.GERMANY),
new DataModel("1,034,567", Locale.CANADA),
new DataModel("1.034567", Locale.KOREA),
new DataModel("1,03.4567", Locale.ITALY) };
/**
* @param args
*/
public static void main(String[] args) {
for (int i = 0; i < testData.length; i++) {
double d = In18Helper.getInstance().getDouble(testData[i].mValue,
testData[i].mLocale);
System.out.println("Trial Value: "+testData[i].mValue+" for Locale: "+testData[i].mLocale+" converted to: "+d);
}
}
private static class DataModel {
String mValue;
Locale mLocale;
public DataModel(String value, Locale locale) {
this.mLocale = locale;
this.mValue = value;
}
}
}
输出:
Trial Value: 1.034567 for Locale: en converted to: 1.034567
Trial Value: 1,0345.67 for Locale: en converted to: 10345.67
Trial Value: 1.0345,67 for Locale: de_DE converted to: 10345.67
Trial Value: 1,034,567 for Locale: en_CA converted to: 1034567.0
Trial Value: 1.034567 for Locale: ko_KR converted to: 1.034567
Trial Value: 1,03.4567 for Locale: it_IT converted to: 1.03
希望这会有助于某人使用。
答案 3 :(得分:1)
public static Double parseDoubleTL(String value){
DecimalFormat df = new DecimalFormat("#.#", new DecimalFormatSymbols(new Locale("tr_TR")));
Double doublePrice = 0.0;
try {
doublePrice = df.parse(value).doubleValue();
} catch (ParseException e) {
Log.w(MainActivity.TAG,"Couldnt parse TL. Error is "+e.toString());
}
return doublePrice;
}
答案 4 :(得分:0)
不是最好的方式,但为我工作;
Double val=null;
try{
val=Double.valueOf(value);
}catch(Exception e){
val=Double.valueOf(value.replace(',','.'));
}
Double val=null;
try{
val=Double.valueOf(value);
}catch(Exception e){
val=Double.valueOf(value.replace(',','.'));
}
return val;
答案 5 :(得分:-1)
我错误:
java.lang.NumberFormatException: Invalid float: "1,683.88"
......这对我有用
replace(",", "")
答案 6 :(得分:-2)
DecimanFormat df = new DecimalFormat("#.#");