// Checks if values are numbers only
public static boolean NumbersOnly()
{
// Variables
String Year;
String amount;

char Yearchar;
char Amountchar;


// For loop for Year
for (int i = 0; i < Year.length() ; i++)
{

if (Character.isDigit(Yearchar))
{ System.out.println(Yearchar + " is numeric.");
  return true;
} else
{ System.out.println(Yearchar + " is a letter.");
  return false;

}
}

for (int i = 0; i < amount.length() ; i++)
{

if (Character.isDigit(Amountchar))
{ System.out.println(Amountchar + " is numeric.");
  return true;
} else
{ System.out.println(Amountchar + " is a letter.");
  return false;

}
}


} //end of NumbersOnly method


// 'get' Input amount method
public static boolean InputAmount()
{
Scanner keyboard = new Scanner(System.in);
// Variables
char amountchar;
String Amount;

System.out.print("Enter the amount(9999): ");
Amount = keyboard.nextLine();
amountchar = Amount.charAt(0);


while (NumbersOnly(String Amount) = true)
{
System.out.println("Error!");


}
}// End of InputAmount