how to call a different class from within an if/else statement?

I am creating a banking application for my assignment, I would like to know if it's possible to call another class from an if/else statement? if so, where have I gone wrong? as when before compiling I get no errors, but many errors when trying to run. I would like to call the 'public void currentAccountCreate in the currentAccount.java class. I also have a main menu page. many thanks

import java.util.Scanner;

public class Account {

Scanner keyboard = new Scanner(System.in);

currentAccount currentAccountCreating = new currentAccount();
//savingsAccount savingsAccountCreating = new savingsAccount();


public void accountCreation(){
    String createOption = "";
    boolean valid = false;
    while(!valid){
        System.out.println("What account would you like to create?");
        System.out.println("Current or savings?");
        createOption = keyboard.nextLine();
    if (createOption.equalsIgnoreCase("current")){
        currentAccountCreating.currentAccountCreate();
    }
        else  {
            System.out.println("Invalid account type selected. Please enter checking or savings");

         }
    }

    }
}

Here's what I'm trying to call

public class currentAccount extends Account {

public void currentAccountCreate(){