用正则表达式 java 替换字符串

Question

I want to replace a sw version from a string like this: " XSYS: 3.5.0 " with something like this: " XSYS: 3.10.0 ". Only that i want a method that uses regex that can change whatever is after "XSYS: ", whether the are xx.yy.zz or x.yyy.zz characters after that or combinations like these. It has to be something generic, so that if the version will become eventualy 5.100.23 (it's just an example) it will keep working. I don't know if I was right in phrasing.

Answer 1

I suggest you take a look at this site, as it helped me understand regex better: https://regex101.com/ else if a piece of code is what you want, please consider that i didn't test it:

String regex = "^XSYS: \\d{1,3}.\\d{1,3}.\\d{1,3}$"
Boolean matches = yourString.matches(regex);

Hope it helped:)