import java.util.Scanner;

public class ValidateInput{

public static void main(String[] args){

Scanner scanner = new Scanner(System.in);

int lineNum = 0;

while(true){

System.out.printf("%nEnter the employee info: ");

String entry = scanner.nextLine();

System.out.println("nextline() value: " + entry); // for debug puporse

entry = entry.trim(); // remove the possible leading and trailing spaces.

if(entry.matches("(?i)quit")){ // Use embedded flag expression to ignore the case

break;

}

if(entry.matches("\\w+\\s+\\d+")){

// legal entry

String[] items = entry.split("\\s+");

System.out.printf("%1$d. Name: %2$s, Age: %3$s%n", ++lineNum, items[0], items[1]);

}else if(entry.matches("\\D+")){

System.out.println("age field missing.");

}else if(entry.matches("\\d+")){

System.out.println("name field missing.");

}else{

System.out.println("Violate format rule: name age");

}

}

scanner.close();

}

}