I want to get all the numerical constants from a line of java statement. Numerical constants here refer to
1. int
2. float
3.double
For a example,
by running the method on the statement
"i = 232; f = 23.123f; c= f2h; int aa_2, b$99 ",
we should get 232, 23.123f and f2h but not 2 and 99.
How can I do that?
It seems to me that pattern match will not do the job well, am I right?
Thanks for the reply, Drclap.
Could you please give me an example? I have no idea about how to use a java parser to do this job.
By the way, I assume the input java statement is correct, so " 2 =27; int 227" wil never be considerred.
Thanks again.
Message was edited by:
since81
> It seems to me that pattern match will not do the job
> well, am I right?
It looks ugly but
String line = "i = 232; f = 23.123f; c= f2h; int aa_2, b$99 ";
Pattern pattern = Pattern.compile("((?<=i ?= ?)\\d+|(?<=f ?= ?)\\d*(\\.\\d*)f|(?<=c ?= ?)[0-9a-f]+h)");
Matcher matcher = pattern.matcher(line);
while (matcher.find())
{
System.out.println(matcher.group(1));
}
and as DrClap points out there is room for ambiguity.
I bet "uncle_alice" could do better.