Java StringtoUpperCase and addExclamationPoint

public class MyJava { //create the class
    public static void main(String[] args) { //start the script
        String sentence = "I learnt this script from watching a 10-minute video lol"; //a string
        System.out.println(sentence.toUpperCase()); //prints I LEARNT THIS SCRIPT FROM WATCHING A 10-MINUTE VIDEO LOL
    }
    public static void addExclamationPoint(String sentence) { //create the method
        System.out.println(sentence + "!") //prints I LEARNT THIS SCRIPT FROM WATCHING A 10-MINUTE VIDEO LOL!
        }
} //ends the script