Removing the comments from a string

Question

I\'d like to do a function which gets a string and in case it has inline comments it removes it.

public class sample {

    public static void main(String[] arg         


        

Answer 1

Try

replaceAll("(?s)/\\*.*?\\*/", "")

Example:

String code = "/**THIS IS SAMPLE CODE */ public class TestFormatter{public static void main(String[] args){int i =2; String s= \"name\";\\\\u give give change the values System.out.println(\"Hello World\");//sample}}";
System.out.println(code.replaceAll("(?s)/\\*.*?\\*/", ""));

Output:

public class TestFormatter{public static void main(String[] args){int i =2; String s= "name";\\u give give change the values System.out.println("Hello World");//sample}}

---

PS.

if you also want to remove last comments //sample}}

Then use split()

System.out.println(code.replaceAll("(?s)/\\*.*?\\*/", "").split("//")[0]);
// keep in Mind it will also Remove  }} from //sample}} 

Output:

 public class TestFormatter{public static void main(String[] args){int i =2; String s= "name";\u give give change the values System.out.println("Hello World");

Answer 2

replaceAll("((/\\*)[^/]+(\\*/))|(//.*)", "")

This will remove single line, multi-line or doc comments.

The JavaScript compatible regex is ((/\*)[^/]+(\*/))|(//.*), which you can try with regexpal.com.