I'm doing an java activity that if Name start with letter A-G and Ends with Letter H-z the output is invalid heres my code:

System.out.print("Enter your name: ");
String str = in.readLine();
 if(str.startsWith("a" )){
            System.out.print("INVALID!");
        }  if(str.endsWith("h")){
            System.out.print("INVALID!");
        }

This works but how can i implement letter a to g and h to z i already try this [a-g] and it not WORK!