Mainjava1 error class Round is public should be declared in a file named Roundjavapublic class Round ^1 error

This error message is indicating that the class "Round" should be declared in a file named "Round.java". This is because in Java, the name of the file should match the name of the public class declared in that file.

To fix this error, you should create a new file named "Round.java" and move the "Round" class definition into that file. Alternatively, you could rename the existing file to "Round.java" if it is currently named something different.