c#string.format

字符串的數(shù)字格式

stringstr1 =string.Format("{0:N1}",56789);  //result: 56,789.0
stringstr2 =string.Format("{0:N2}",56789);  //result: 56,789.00
stringstr3 =string.Format("{0:N3}",56789);  //result: 56,789.000
stringstr8 =string.Format("{0:F1}",56789);  //result: 56789.0
stringstr9 =string.Format("{0:F2}",56789);  //result: 56789.00
stringstr11 =(56789 / 100.0).ToString("#.##");  //result: 567.89
stringstr12 =(56789 / 100).ToString("#.##");  //result: 567

C 或 c

貨幣

Console.Write("{0:C}", 2.5); / 2.50
Console.Write("{0:C}", -2.5); //($2.50)

D 或 d

十進(jìn)制數(shù)

Console.Write("{0:D5}", 25); //00025

E 或 e

科學(xué)型

Console.Write("{0:E}", 250000); //2.500000E+005

F 或 f

固定點(diǎn)

Console.Write("{0:F2}", 25); //25.00
Console.Write("{0:F0}", 25); //25

G 或 g

常規(guī)

Console.Write("{0:G}", 2.5); //2.5

N 或 n

數(shù)字

Console.Write("{0:N}", 2500000); //2,500,000.00

X 或 x

十六進(jìn)制

Console.Write("{0:X}", 250); //FA
Console.Write("{0:X}", 0xffff); //FFFF

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C#格式化數(shù)值結(jié)果表

Strings

There really isn't any formatting within a strong, beyond it's alignment. Alignment works for any argument being printed in a String.Format call.

Numbers

Basic number formatting specifiers:

Custom number formatting:

Dates

Note that date formatting is especially dependant on the system's regional settings; the example strings here are from my local locale.

Custom date formatting:

Enumerations

Some Useful Examples

String.Format("{0:＄#,##0.00;(＄#,##0.00);Zero}", value);

This will output "＄1,240.00" if passed 1243.50. It will output the same format but in parentheses if the number is negative, and will output the string "Zero" if the number is zero.

String.Format("{0:(###) ###-####}", 18005551212);

This will output "(800) 555-1212".

變量.ToString()

字符型轉(zhuǎn)換 轉(zhuǎn)為字符串
12345.ToString("n"); //生成 12,345.00
12345.ToString("C"); //生成 ￥12,345.00
12345.ToString("e"); //生成 1.234500e+004
12345.ToString("f4"); //生成 12345.0000
12345.ToString("x"); //生成 3039 (16進(jìn)制)
12345.ToString("p"); //生成 1,234,500.00%

java字符串格式化：String.format()方法的使用大全

字符型轉(zhuǎn)換 轉(zhuǎn)為字符串

12345.ToString("n"); //生成 12,345.00

12345.ToString("C"); //生成 ￥12,345.00

12345.ToString("e"); //生成 1.234500e+004

12345.ToString("f4"); //生成 12345.0000

12345.ToString("x"); //生成 3039 (16進(jìn)制)

12345.ToString("p"); //生成 1,234,500.00%

java字符串格式化：String.format()方法的使用大全

字符串格式化，即按照你想要的字符串格式輸出，如時(shí)間顯示格式等，下面這個(gè)網(wǎng)站介紹的相當(dāng)全面。

參考網(wǎng)站：http://kgd1120.iteye.com/blog/1293633：

鏈接點(diǎn)擊： String.format()方法的使用大全

實(shí)例：在android系統(tǒng)里面進(jìn)行文件操作時(shí)，有時(shí)會(huì)使用當(dāng)前時(shí)間，作為要保存數(shù)據(jù)的文件名，以便區(qū)別文件及日后對(duì)此文件進(jìn)行操作。就如錄像文件，當(dāng)日保存下來(lái)的錄像肯定會(huì)用當(dāng)日的時(shí)間作為文件名稱(chēng)的一部分，方便以后查看。

如：

Time t = new Time();
t.setToNow(); 
String filename = String.format("/record%04d%02d%02d%02d%02d%02d.avi",
   t.year, t.month+1 , t.monthDay, t.hour, t.minute, t.second);

音視頻項(xiàng)目中經(jīng)常會(huì)用此文件命名方式。