Knocks out an error in Java classes, what should I change or read for the future?

Question

Java

You need to display the MyAccount variables in the console, and by analogy the following

Answer 1

Read any Java book.
You can start with G. Schildt - A Beginner's Guide to Java.
And about the error:
you have 2 public classes in one java file (Main.java)

public class Main{} 
public class BANKACCOUT{}

Also note the Java naming convention. Instead of class name BANKACCOUT should be BankAccount

Answer 2

the file name must match the name of the public class
Main.java and public class BANKACCOUT