public class Test
{
public static void main(String[] args) throws MyException{
Scanner sc=new Scanner(System.in);
System.out.println("請輸入壹串字符'a'-'z'");
String str=sc.nextLine();
if(str.matches("^[a-z]+$")){
System.out.println("您輸入的字符串是："+str);
}else{
throw new MyException("請輸入正確的英文字母!");
}
}
}
class MyException extends Exception{
public MyException(String e){
super(e);
System.out.println(e);
}
public MyException(){}
}