Why String.replaceAll() don't work on this String?

Question

    //This source is a line read from a file 
    String src = \"23570006,music,**,wu(),1,exam,\\\"Monday9,10(H2-301)\\\",1-10,score,\";

    //This sohuld be from a mat         


        

Answer 1

( and ) are regex metacharacter; they need to be escaped if you want to match it literally.

String group = "\"Monday9,10\\(H2-301\\)\"";
                            ^        ^

The reason why you need two slashes is that because \ in a string literal is itself an escape character, so "\\" is a string of length 1 containing a slash.