Can anyone help me here? Why doesnt hi 5 doesnt get executed

Question

https://code.sololearn.com/c2k3Yl0qTrgV/?ref=app

Answer 1

public class Program
{
static int balance = 1500;

static void showBalance(){
System.out.println(balance);
}

static void depositAmount(int addB){
balance += addB;
System.out.println(balance);
}

public static void main(String[] args) {
showBalance();
depositAmount(300);
}
}

Answer 2

ref2.depositamount(9); // to execute it "hi 5"

Answer 3

Thank you and I wish to correct you I think that was a static method and now the present code is right
Thanks for the insights