Parsing string to double - java

Question

For a project I have a program that is like a bank. The "bank" reads in a file with accounts in it that look like this:
Miller
William
00001
891692 06 <----string that needs to be converted to double
The last string has to be converted to a double so that the program can perform calculations on it like addition and subtraction, etc.
And also I have to print it out in monetary format, i.e. $891692.06

I have this so far:

 public class Account { private String firstName, lastName; private int accountID; private String currentBalance; private static int maxAccountID; public Account(String fN, String lN, int acct, String bal) { firstName = fN; lastName = lN; accountID = acct; currentBalance = bal; if(accountID > Account.maxAccountID) Account.maxAccountID = accountID; } public double getBalance(){ String [] s = currentBalance.split(" "); String balStr = "$"+s[0]+"."+s[1]; double currentBalance = Double.parseDouble(balStr); return currentBalance; } }

Thanks in advance!

What exactly is your question? In your code already you convert a String to a double with Double.parseDouble(balStr) — adchilds
– adchilds, Commented Oct 31, 2012 at 19:50

Sergey Kalinichenko · Accepted Answer · 2012-10-31 19:52:04Z

14

If your string representing double uses space ' ' instead of a decimal point, you can fix it by replacing the space with a dot, like this:

String currentBalanceStr = "891692 06"; double currentBalanceDbl = Double.parseDouble(currentBalanceStr.replaceAll(" ","."));

Link to ideone.

answered Oct 31, 2012 at 19:52

Sergey Kalinichenko

729k85 gold badges1.2k silver badges1.6k bronze badges

Sign up to request clarification or add additional context in comments.

8 Comments

Gcap Over a year ago

With this it's returning the amounts as '0.0'

Sergey Kalinichenko Over a year ago

@Gcap That is strange. Did you follow the link to see if your code does the same thing as mine?

Gcap Over a year ago

Yes it looked at that.. the thing is that I have a string being inputted through currentBalanceStr from another class

Sergey Kalinichenko Over a year ago

@Gcap You should print currentBalanceStr to see its value before calling parseDouble then.

Gcap Over a year ago

Nvmd its working lol but when the String is say "891692 60" it cuts off the 0 at the end, do you know of any way I can keep it?

|

tokhi · Accepted Answer · 2012-10-31 20:09:42Z

Using Double for balance calculation is not a good idea, it makes more sense to use the BigDecimal because it is more precise.

You can also add the currency using the class bellow:

Locale enUSLocale = new Locale.Builder().setLanguage("en").setRegion("US").build(); Currency currencyInstance = Currency.getInstance(enUSLocale); System.out.println( "Symbol for US Dollar, en-US locale: " + currencyInstance.getSymbol(enUSLocale));

please go through this link for more details.

Suganthan Madhavan Pillai · Accepted Answer · 2014-01-24 10:51:12Z

3

It seems like you are doing some currency calculation, so always use BigDecimal

BigDecimal balStr = new BigDecimal(String.replaceAll(" ",".");

answered Jan 24, 2014 at 10:51

Suganthan Madhavan Pillai

5,64510 gold badges59 silver badges86 bronze badges

1 Comment

hyperneutrino Over a year ago

Good idea to use BigDecimal for precision calculations

soz · Accepted Answer · 2020-03-04 22:34:03Z

String s="891692 06"; Double.parseDouble(s.replace(" ", ".")); would do the trick

You can use NumberFormatClass from the API to get the monetary information.

Collectives™ on Stack Overflow

Parsing string to double - java

4 Answers 4

8 Comments

1 Comment

1 Comment

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

8 Comments

1 Comment

1 Comment

Comments

Linked

Related