How to remove single and multi-line comments from a string in Salesforce apex?

Hello Madhulika,
Try using this regex (Single line comments only):

String src ="How are things today /* this is comment */ and is your code /* this is another comment */ working?";
String result=src.replaceAll("/\\*.*?\\*/","");//single line comments
System.out.println(result);

Here is regex for single and multi-line comments by adding (?s):

//note the added \n which won't work with previous regex
String src ="How are things today /* this\n is comment */ and is your code /* this is another comment */ working?";
String result=src.replaceAll("(?s)/\\*.*?\\*/","");
System.out.println(result);

Thanks.

May be use this to remove:

.replace(///.*?/?*.+?(?=n|r|$)|/*[sS]*?//[sS]*?*//g, ”)

Thanks