Can you parse a specific index of a String Array to a double number?

Question

I have an array of Strings where one index specifically the 7th one, needs to be a double number so I could use a conditional on it.

while (s.hasNextLine()) {
                    String customer = s.nextLine();
                    String[] fields = customer.split("\\|");

double score = Double.parseDouble(fields[7]);
}

Also gave this a try, but no luck. Still the same error.

while (s.hasNextLine()) {
                String customer = s.nextLine();
                String[] fields = customer.split("\\|");
                if (Double.parseDouble(fields[7]) > 5.00) {

The fields[7] contains all the numbers in my input file but how do I make them double values in order to use a conditional on them in an if statement. All the other indexes must stay at strings however.

Doing this causes this error:

Exception in thread "main" java.lang.NumberFormatException: For input string: "$280.80"
    at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)
    at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
    at java.lang.Double.parseDouble(Double.java:538)
    at CollectionLetter.main(CollectionLetter.java:13)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

SOLUTION: THE ANSWER WAS THAT I HAD CURRENCY SYMBOLS AND I WAS TRYING TO PARSE IT STILL, I SIMPLY USED:

            if (Double.parseDouble(fields[7].replace("$","")) > 5.00) {

THANK YOU EVERYONE!

[`Double#parseDouble`](http://docs.oracle.com/javase/7/docs/api/java/lang/Double.html#parseDouble(java.lang.String)) — RaminS, Mar 27 '17 at 17:57
You need to remove the first character in the string - `'$'`, before using it as input. — RaminS, Mar 27 '17 at 18:03
OMG, I hadn't thought about that! Thank you so much @Gendarme — Lubeular, Mar 27 '17 at 18:04
Doubles don't contain currency symbols. Remove it before you try parsing it. — Ken White, Mar 27 '17 at 18:04

score 0 · Answer 1 · answered Mar 27 '17 at 17:59

0

If I am understanding your question correctly, you must be trying to check for a double value from a string.

In this case, Double.parseDouble is needed.

if(Double.parseDouble(fields[7]) ... )

answered Mar 27 '17 at 17:59

Trivaxy

41
1
5

I tried it but got the error that I included onto the edit of my post – Lubeular Mar 27 '17 at 18:01

score 0 · Accepted Answer · edited May 23 '17 at 12:02

0

Please handle parsing currencies correctly. Although your string is "$123456.78", in other parts of the world "₹3,00,00,000" or "R$ 399,00" are valid amounts.

Use NumberFormat to avoid things blowing up when your friend in Japan runs your code.

If you don't think all that is really needed, here is Boris' shortcut: https://stackoverflow.com/a/23991368/3430807

edited May 23 '17 at 12:02

Community

1
1

answered Mar 27 '17 at 18:24

Andreas

4,937
2
25
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Yeah I am truly a fool for not thinking about the currency marks were the reasoning behind the error in parsing it as a double. You are answer is more correct than the only other one, so I give it to you. – Lubeular Mar 27 '17 at 18:41

Can you parse a specific index of a String Array to a double number?

2 Answers2