Translate php regex to java

Question

I have trouble to translate this php regex /^([-\.\w]+)$/ to java regex.

I try ^([-\\.\\w]+)$ but don't work.

The regex is used to validate a string used for a name of file.

in PHP is not allowed têst.ext, but in JAVA it's.

can you define but don't work can you share some inputs that not works ok please — Youcef LAIDANI
– Youcef LAIDANI, Commented May 15, 2018 at 17:33
Why doesn't it work? What is your input? Which method are you using? Please post a minimal reproducible example — Yassin Hajaj
– Yassin Hajaj, Commented May 15, 2018 at 17:34
The error is no in the input, the error is in the regex java syntax, the question is Why its happening only in it? I write wrong or PHP and JAVA have different manipulation? — user2022323
– user2022323, Commented May 15, 2018 at 18:22

Bohemian · Accepted Answer · 2018-05-15 17:33:43Z

2

In java, it would be:

str.matches("[-.\\w]+")

There is no need to escape the dot in a character class in any language/tool.
There is no need to use ^ or $ with java's String#matches() because it's implied (the whole string must match)
There is no need to create a group (the brackets)

answered May 15, 2018 at 17:33

Bohemian♦

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1 Comment

There's no need for them, but they shouldn't cause it to fail, should it?