simple-java-regex-tester's Introduction

simple-java-regex-tester

A tool for testing Java regular expressions.
Matches are higlighted in green at the top pane. Match positions as well as matched regex groups are displayed in the bottom pane.

NOTE: The source contains a GUI form created using NetBeans GUI Builder.

Open from commandline:

java -cp * com.tilde.simpleregextester.UserForm

java -jar SimpleRegexTester-1.0.jar

Application window example

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simple-java-regex-tester's Issues

Highlight offset due to newline characters in the input string

Incorrect order of matched groups and matching positions

If a match for a group that has an asterisk quantifier is null, start and end positions of such matches are displayed in a reverse order (or has a length of -1).

Test example:
Input:

ASV sāka spēlēt aktīvāk, tomēr Somijas izlases aizsardzība bija pārāka. Tad 47. minūte Somijas hokejistiem izdevās pretuzbrukums divi pret vienu un pēc Juhamati Altonena piespēles ar rezultatīvu metienu izcēlās Jonass Kempainens, panākot divu vārtu pārsvaru. ASV izlasei spēles pavedienu tā arī neizdevās atrast, un amerikāņi neguva "golu".

Regex:

([。．.！!?？…])([\u0002"'\p{Pe}\p{Pf}¹²³]*)(\s+)

Result:

Match 1
   Group0 (p.70-71): ([。．.！!?？…])([\u0002"'\p{Pe}\p{Pf}¹²³]*)(\s+)   =>   '. '
   Group1 (p.70): (\s+)   =>   '.'
   Group2 (p.71-70): ([\u0002"'\p{Pe}\p{Pf}¹²³]*)   =>   ''
   Group3 (p.71): ([。．.！!?？…])   =>   ' '
- - - - -
Match 2
   Group0 (p.78-79): ([。．.！!?？…])([\u0002"'\p{Pe}\p{Pf}¹²³]*)(\s+)   =>   '. '
   Group1 (p.78): (\s+)   =>   '.'
   Group2 (p.79-78): ([\u0002"'\p{Pe}\p{Pf}¹²³]*)   =>   ''
   Group3 (p.79): ([。．.！!?？…])   =>   ' '
- - - - -
Match 3
   Group0 (p.257-258): ([。．.！!?？…])([\u0002"'\p{Pe}\p{Pf}¹²³]*)(\s+)   =>   '. '
   Group1 (p.257): (\s+)   =>   '.'
   Group2 (p.258-257): ([\u0002"'\p{Pe}\p{Pf}¹²³]*)   =>   ''
   Group3 (p.258): ([。．.！!?？…])   =>   ' '
- - - - -

Suggestion: Match end positions may be omitted in results. May be display a match length instead.