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Regexps in Java

Backslash problem

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To use the backslash \ as a simple character in a Java regex, I need to ...

Here's the explanation: first, two backslashes \\ are needed for regex language to match a single backslash \ in the string. Second, for the regex to look this way, Java requires each of these two backslashes to be escaped with another backslash.

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put another backslash before it: the result is "\\"

put two backslashes before it: the result is "\\\"

just type it as it is: the result is "\"

put three backslashes before it: the result is "\\\\"

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