IntelliJ使用 $ strong 用于替换反向引用。

IntelliJ uses $1 for replacement backreferences.

来自IntelliJ的帮助：

From IntelliJ's help:

有关正则表达式及其语法的更多信息，请参阅 java.util.regex 后引用应该是$ n，而不是\ n格式。

For more information on regular expressions and their syntax, refer to documentation for java.util.regex Back references should have $n, rather than \n format.