Question

I want to replace substringin string.
For example:

localStringBuilder is for example "[sender] is xxxx xxxx xxx".

and when I run

localStringBuilder.toString().replaceAll("[sender]", callerName);

not working correctly. Prblem is with [] characters. How to solve this?

Answer 1

Just use replace in place of replaceAll

replaceAll take REGEX as input, not a String, but regex. [] are important parts of regexes using to group expressions.

localStringBuilder.toString().replace("[sender]", callerName); will work exaclty as you expect, because it takes normal Strings as both parameters.

is the same. Works when is no [] characters in string – @mbrc 1 min ago

not true, I’ve tested it:

public static void main(String[] args) {
    String s = "asd[something]123";
    String replace = s.replace("[something]", "new1");
    System.out.println(replace);
}

output: asdnew1123