How can I remove " ' " from a String

Question

I tried:

mystring.replace("'","");

and also

mystring.replaceAll("[']","");

But none of them work, please show me how to remove that ' from my string.

Answer 1

Are you assinging the result of this method? You should be calling it like this :

mystring = mystring.replace("'","");

Strings in Java are immutable - when you call replace, it doesn't change the contents of the existing string - it returns a new string with the modifications. So you want:

This is why you have to assign the return value to a string.

As a note, this also applies to all methods in String. Methods like toUpperCase() return the new string. It does not change the existing.

Answer 2

First, for better help faster please post an MCVE. Next, Java String is immutable, so you must update the mystring reference. Something like,

String mystring = "Papa John's";
mystring = mystring.replace("'","");
System.out.println(mystring);

Output is (as requested) without '

Papa Johns