Replace single quotation marks in a string with double quotes in Java

String regexp = "\";
String str = "' Good '";
System.out.println ("Pre-replacement:" + str);
str = Str.replaceall (regexp, "\" ");

Note that this must be written in str = Str.replaceall (regexp, "\");

cannot be written as Str.replaceall (RegExp, "\"); This will result in a result or ' good ', and single quotes are not replaced because the string class is final decorated and immutable. Therefore, any action on a string object does not alter its contents. and Str.replaceall (RegExp, ""); The equivalent of creating a new string object with a double-quoted string. Then modify the string to refer to str pointing to the new string, and now print the string after the single quote is removed.

System.out.println ("After replacement:" + str);

Replace single quotation marks in a string with double quotes in Java