public class Main {
    public static void main(String[] args) {
        User user = null;
        System.out.println(user.name); // Exception in thread "main" java.lang.NullPointerException at Main.main(Main.java:3)
    }
}

class User {
    String name;
}
	public class Main {
	public static void main(String[] args) {
	User user = null;
	System.out.println(user.name); // Exception in thread "main" java.lang.NullPointerException at Main.main(Main.java:3)
	}
	}

	class User {
	String name;
	}