Trimming new line character from a string in java

Question

The output of below program:

public class TestClass {

    public static void main(final String[] args){
        String token = \"null\\n\";
        token.tr         


        

Answer 1

Strings are immutable. Change

token.trim();

to

token = token.trim();

Answer 2

Since String is immutable

token.trim();

doesn't change the underlying value, it returns a new String without the leading and ending whitespace characters. You need to replace your reference

token = token.trim();