Thank you, everyone, I fixed it, and it now works!

Ok , u did what Six and Coder said. Just so you know, there can only be 1 public static void main(String[] args). If you wanna fix this, change the public static void main(String[] args) in SammysMotto2 to public SammysMotto2

Have you tried:

Main.java

class Main {
  public static void main(String[] args) {
    SammysMotto2.main();
  }
}

and then for SammysMotto2.java:

class SammysMotto2 {
  public static void main() {
    System.out.println("SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS");
    System.out.println("S Sammy's makes it fun in the sun S");
    System.out.println("SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS");
  }
}

Replace Line 3 of Main.java to SammysMotto2.main(args);