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Editorial Team
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Asked: 2026-06-05T03:18:49+00:00

I’m trying to use a Scanner to read in lines of code from a

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I’m trying to use a Scanner to read in lines of code from a string of the form “p.addPoint(x,y);”

The regex format I’m after is:

*anything*.addPoint(*spaces or nothing* OR ,*spaces or nothing*

What I’ve tried so far isn’t working: [[.]+\\.addPoint(&&[\\s]*[,[\\s]*]]

Any ideas what I’m doing wrong?

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1 Answer

  1. Editorial Team

    I tested this in Python, but the regexp should be transferable to Java:

    >>> regex = '(\w+\.addPoint\(\s*|\s*,\s*|\s*\)\s*)'
>>> re.split(regex, 'poly.addPoint(3, 7)')
['', 'poly.addPoint(', '3', ', ', '7', ')', '']

    Your regexp seems seriously malformed. Even if it wasn’t, matching infinitely many repetitions of the . wildcard character at the beginning of the string would probably result in huge swaths of text matching that aren’t actually relevant/desired.

    Edit: Misunderstood the original spec., current regexp should be correct.

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