How to replace exact string containing characters @ and # in java

Question

Hi I am getting trouble in replacing the exact string containing # and @ characters. I tried mytext.replaceAll('\\\\b('+text+')\\\\b',"testtest"); also but it also didn't helped. Exact string means the exact word.

String myStr = "test1 test";
                    myStr= myStr.replaceAll('\\b('+ Pattern.quote("test") +')\\b',"notest")//out put string "test1 notest"
                    //Exact word means only "test" is getting replace not "test" from "test1" word to notest1
                    String myStr1 = "test1 #test";
                    myStr1 = myStr1.replaceAll('\\b('+Pattern.quote("#test") +')\\b',"notest")//out put string "test1 #test", #test is not replaced

Can some one please help me. Thanks in advance

Answer 1

You have several compilation errors.

This piece of code is working for me:

String myStr = "test1 test";
    myStr= myStr.replaceAll("\\b("+ Pattern.quote("test") +")\\b","notest");
    System.out.println(myStr);
    String myStr1 = "test1 #test";
    myStr1 = myStr1.replaceAll("\\b("+Pattern.quote("#test") +")\\b","notest");
    System.out.println(myStr);

Answer 2

I think what you want is:

mytext.replaceAll("(^|\\W)("+text+")($|\\W)", "$1"+replacement+"$3"))

The problem with \\b in your solution is that it only matches [a-zA-Z0-9_] and # as well as @ separate your words instead of being included.