What will be the Regex for my required pattern

Question

I have a pattern like -

public static void myMethod(int Val , String Val){}

so public\static\void\myMethod(int\sVal\s,\sString\sVal)

but if my method have more space than one like public static it fails. So how to make a concrete pattern .

Moreover the part inside the bracket is not working, suggest me the way to resolve.

score 4 · Accepted Answer · edited May 23 '17 at 10:08

4

Use \s+ to match one or more occurrence, and \s* to match zero or more occurrences. Escape the parentheses so that they are not interpreted as grouping operators.

public\s+static\s+void\s+myMethod\s*\(\s*int\s+Val\s*,\s*String\s+Val\s*\)

That said, it looks like you are trying to parse Java code with a regular expression. This is not possible since Java (like the infamous [X]HTML) is not a regular language.

edited May 23 '17 at 10:08

Community

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answered Jun 22 '11 at 05:01

Matt Ball

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I would just change the + with a * before the comma – jclozano Jun 22 '11 at 05:03
Actually I just want to read the methods from java , I got JavaParser for the same , so now I am doing the assembling job of all parameters , return type and method name to make a complete method and then to revalidate. – Abhishek Choudhary Jun 22 '11 at 05:11
Thanks , that worked :) , can you suggest me the importance of a* as when I changed it I found it was accepting only 1 space between the word blocks. – Abhishek Choudhary Jun 22 '11 at 05:15

score 1 · Answer 2 · answered Jun 22 '11 at 05:00

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use \s+ instead

answered Jun 22 '11 at 05:00

OscarRyz

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`\s*` allows no whitespace, and `privatestaticvoid` is not legit – Ben Roux Jun 22 '11 at 05:01
@Ben so true, I was typing too fast :P – OscarRyz Jun 22 '11 at 05:02

score 1 · Answer 3 · answered Jun 22 '11 at 05:00

A few things, but you are on the right track. Replace your \s with \s+ to indicate 1 or more whitespace characters.

Also, your parens are not working because they are reserved regex characters. You must escape them to have them be literally interpreted

/public\s+static\s+void\s+myMethod\s*\(\s*int\s+Val\s*,\s*String\s+Val\s*\)/

score 1 · Answer 4 · answered Jun 22 '11 at 05:00

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Try using the "one or more" modifier (+) to match multiple occurrences:

public\s+static\s+void\s+myMethod...

answered Jun 22 '11 at 05:00

maerics

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What will be the Regex for my required pattern

4 Answers4