java - Javaで、「[」ではない文字を照合する方法は？

Answer 1

Escape the [ within the negated character class. Although this shouldn't be necessary inside of a character class, clearly Java is having an issue with it, and it does not change the meaning of the character class to escape characters that shouldn't have a special meaning within a character class.

Try the following:

(\[.+?\][^\[]+)

Or for the Java code:

Pattern pattern = Pattern.compile(“(\\[.+?\\][^\\[]+)”);

Answer 2

You need to escape the square bracket it just like you escaped them earlier:

(\\[.+?\\][^\\[]+)

The runtime exception is being caused because the RegEx parser sees [^[] as having an unclosed bracket.

Answer 3

You need to excape the bracket, this should work :

[^\\[]

Answer 4

The Java implementation seems to have a bug.

Normally, regex does not require you to escape it, but try escaping it anyway.

(\[.+?\][^\[]+)
"(\\[.+?\\][^\\[]+)"

It could be considered good practice to escape special characters, even if they don't need to be. It also helps avoid bugs like this.