如何向逗號中添加逗號？

我有下面的代碼，如何向逗號中添加逗號？

Scanner cin = new Scanner(System.in); 

System.out.print("Part-1- Enter the amount inout ($ 1,567.00):"); 
String amountStr = cin.nextLine(); 

String amountStr2 = amountStr.replace("$" , ""); 
String amountStr3 = amountStr2.replace("," , ""); 
double amountDouble = Double.parseDouble(amountStr3); 

double quarters = (amountDouble/.25); 
double quarters2 = Math.floor(quarters); 

int quartersFinal = (int) quarters2;

我想返回數字結果爲6,269的結果。現在，代碼返回6269.我將如何添加逗號？

來源

2014-10-02 Avery Smith

你試過什麼......？ – Ali786 2014-10-02 05:14:31

在API文檔中查找'DecimalFormat'。 – vanza 2014-10-02 05:15:05

http://joda-money.sourceforge.net/userguide.html – Ali786 2014-10-02 05:16:15

您可以使用DecimalFormat

Scanner cin = new Scanner(System.in); 
System.out.print("Part-1- Enter the amount inout ($ 1,567.00):"); 
String amountStr = cin.nextLine(); 
String amountStr2 = amountStr.replace("$" , ""); 
String amountStr3 = amountStr2.replace("," , ""); 
double amountDouble = Double.parseDouble(amountStr3); 
double quarters = (amountDouble/.25); 
double quarters2 = Math.floor(quarters); 
DecimalFormat df = new DecimalFormat("#,###"); 
System.out.println(df.format(quarters2));

輸出地說：

6,268

來源

2014-10-02 05:18:52

詳細試試這個

DecimalFormat df = new DecimalFormat("#,###.##"); 
String amountStr2 = amountStr.replace("$" , ""); 
String amountStr3 = amountStr2.replace("," , ""); 
double amountDouble = Double.parseDouble(amountStr3); 
df.format(amountDouble);

來源

2014-10-02 07:42:26 Jaydeep

的String.format（...）的閱讀文檔。將來你會多次需要它。

來源

2014-10-02 08:19:01 i486

如何向逗號中添加逗號？

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