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Index › Programming Questions & Help › Syntax Questions › converting a string into a number
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converting a string into a number (Read 1473 times)
4dplane
converting a string into a number
Feb 24th, 2006, 9:02am  
Hi,

I have dealt with this before in java but I can't seem to get it to work in processing.

I have:

String digitStr = "384762387642736842734"
int i = Integer.parseInt(digitStr);

I get an error that says Number Format Exception: for input string: "384762387642736842734"

What am I missing?

Thanks,

4dplane
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rexguo
Re: converting a string into a number
Reply #1 - Feb 24th, 2006, 9:45am  
That number is bigger than what Integer
allows: -2147483648 to 2147483647.
The Integer is a signed 32-bit number.

.rex
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toxi
Re: converting a string into a number
Reply #2 - Feb 24th, 2006, 5:38pm  
in that case you'll have to use Long or Float:

Code:
long x=Long.parseLong("384762387642736842734"); // or
float x=Float.parseFloat("384762387642736842734");


hth!
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4dplane
Re: converting a string into a number
Reply #3 - Feb 24th, 2006, 9:15pm  
Thanks for the help, but I am still having problems!

I cannot use the float because the number is not a decimial and when I try the long I get this error:

java.lang.NumberFormatException: For input string: "384762387642736842734"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Long.parseLong(Unknown Source)

etc ...


4dplane
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JohnG
Re: converting a string into a number
Reply #4 - Feb 25th, 2006, 11:09am  
Unfortunately, your number is bigger than a long as well.

Long is limited to +/- 9223372036854775808(ish), and your number is about 40 times bigger than that.

You can treat it as a float/double without a decimal in it.(double is to float what long is to int). You'd lose some information, but you'd at least be able to load it, e.g.
Code:
String a="384762387642736842734" ;
float f=Float.parseFloat(a);
double d=Double.parseDouble(a);
println("float="+f);
println("double="+d);

Gives
Code:
float=3.847624E20
double=3.8476238764273684E20



                 
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