hey there,
I am trying to test strings using regex to make sure that the string may represent a monomial.
that is, it must be 123123213x^213123.
I am having difficulties to find any helpful information on how to test for ^.
I am trying this: [+|-][0-9]*[.][0-9]*[x\^]? but I get a complaint that ^ is not a valid escape sequence (I am using eclipse).
in case you wonder what that [.] is, it is to make sure doubles are matched for.
anyone any idea please.
thank you.
Jump to PostHi, Try this..and let me know ..whether u are looking for same
public class RegExp { public static void main(String[]args) { String test = "123123213x^213123."; System.out.println("Testing " + test); boolean b = test.matches("^[0-9]*[x][\\^][0-9]*[\\.]"); System.out.println(b); } }
\^ isn't an escape sequence, I think what you are looking for is a char literal? i.e. '^'
Hey Ricky116,
this is what I got right now:
[+|-]?[0-9]*[.]?[0-9]*[x]?[\\\\\\^]?[0-9]*[.]?[0-9]*
however, this has a loop because it allows to input 123^3 when a user should actually input 123x^3. I know I can add another if and add the x if no x is there, but can you make that regular expression any better man? It is supposed to test strings to see if they can be monomials.
Hi, Try this..and let me know ..whether u are looking for same
public class RegExp {
public static void main(String[]args)
{
String test = "123123213x^213123.";
System.out.println("Testing " + test);
boolean b = test.matches("^[0-9]*[x][\\^][0-9]*[\\.]");
System.out.println(b);
}
}msvinaykumar,
with minor modifications. pretty much works. thank you man.
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