double类型的转换，在线等候

Question

同意 eagle1111(魔族的祭坛) 好像没有相关的函数吧

Answer 1

简单，用java.text.MessageFormat, 就可以了。

Answer 2

java.text.MessageFormat怎么用啊，谢谢

Answer 3

这个是转换成这样形式的：
-------------
1.2E12testString is 1,200,000,000,000
import java.text.*;
public class showDouble
{  public showDouble()
  {
    double testNumber=1.2E12;
    System.out.println(testNumber);
    String testString=this.convertDouble(testNumber);
    System.out.println("testString is "+testString);
  }  public String convertDouble(double number)
  {
    String backString="";
    NumberFormat nf=NumberFormat.getInstance();
    backString=nf.format(number);
    return backString;
  }
  public static void main(String[] args)
  {
    showDouble showDouble1 = new showDouble();
  }
}

Answer 4

/**
  * Method to replace the double group separator with the null
  * <pre>example: double:1,110,025.1234------->>1110025.1234
  *             : double:1.3546456546453E8---->>454654654,345
  * </pre>
  * @param   d  the double number
  * @return  the string that be replaced
  */
  public static String replaceDoubleSeparator(double d,Locale loc)
  {
    if (loc==null)
      loc = Locale.getDefault();
    NumberFormat nf=NumberFormat.getNumberInstance(loc);
    String s=nf.format(d);
    //get the locale of current cuntry
    DecimalFormatSymbols dfs=new DecimalFormatSymbols(loc);
    System.out.println(dfs.getGroupingSeparator());
    //get the group separator of current cuntry
    //example: china: ","; Germany: "."
    String groupSeparator=new Character(dfs.getGroupingSeparator()).toString();
    String newString=s.replaceAll(groupSeparator,"");
    return newString;
  }  public static void main(String[] args)
  {
    double i=454654654.345;
    double k=1.3546456546453E8;    Locale[] locales =
    {
        new Locale("en","US"),
        new Locale("zh","CN"),
        new Locale("fr","FR"),
        new Locale("de","DE")
    };
    for (int j = 0;j < locales.length;j ++ )
    {
      System.out.println(replaceDoubleSeparator(i,locales[j]));
      System.out.println(replaceDoubleSeparator(k,locales[j]));
    }
  }