Java - 必须抛出异常,但如何？

public class MyClass {
    public static void main(String[] args) {
        try {
            if (args.length == 0) {
                throw new IllegalArgumentException("No arguments provided");
            }
            System.out.println("Hello, " + args[0]);
        } catch (IllegalArgumentException e) {
            System.err.println("Error: " + e.getMessage());
        }
    }
}

public class MyCustomException extends Exception {
    public MyCustomException(String message) {
        super(message);
    }
}

public class MyClass {
    public static void main(String[] args) {
        try {
            if (args.length == 0) {
                throw new MyCustomException("No arguments provided");
            }
            System.out.println("Hello, " + args[0]);
        } catch (MyCustomException e) {
            System.err.println("Error: " + e.getMessage());
        }
    }
}