Error: java.lang.NullPointerException – Unexpected Error Exit Code -1

You have just encountered an error: java.lang.NullPointerException: unexpected error exit code: -1. You should follow some best practices to avoid this type of error in the future. First, structure your code in a way that prevents NullPointerException from arising. Second, avoid explicitly throwing NullPointerException because it makes it difficult to distinguish between null values. Instead, use an @NotNull annotation to indicate that the parameter is null.